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WATER QUALITY IN OTTAWA’S

RIVERS AND STREAMS

 

Text Box:

 

 

 
 
City of Ottawa
Water Environment Protection Program

JUNE 2007

 

 

 

 

 

 

 

 

 

DISCLAIMER

 

This document has been prepared by the City of Ottawa, Water Environment Protection Program, Environmental Programs and Technical Support Division. It is intended to communicate the results of the Baseline Water Quality Monitoring Program from 1998 to 2004. Every attempt has been made to ensure that it accurately reflects the Program. Questions regarding technical findings should be directed to the Water Environment Protection Program.

 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


City of Ottawa, 2006. Water Quality in Ottawa’s Rivers and Streams. Prepared by the Water Environment Protection Program, Environmental Programs and Technical Support Division, Utility Services Branch, Public Works and Services, City of Ottawa.

 

 

 

 

Copyright City of Ottawa, 2006

 

 

 

 City of Ottawa

Public Works and Services

Water Environment Protection Program

655 Shefford Road, 2nd Floor

Gloucester (Ottawa), ON, K1J 8G8

 
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Executive Summary

 

The City of Ottawa is blessed with an extensive network of rivers and streams. These provide many benefits. They provide us with water for farms, industries, institutions and homes. They recharge groundwater and support complex communities of wildlife. They provide beauty, unparalleled vistas and a host of recreational opportunities for residents and visitors alike.

 

Water Quality in Ottawa’s Rivers and Streams was prepared by the City of Ottawa’s Water Environment Protection Program (WEPP) to provide up-to-date information on the condition of Ottawa’s surface water resources. It describes the City’s network of rivers and streams and WEPP’s role in maintaining them in a healthy state. It outlines the City’s ongoing Program to monitor water quality -- the Baseline Water Quality Monitoring Program – and explains why we monitor, what we monitor and how we do it. The document presents key findings from seven years of extensive water quality monitoring representing some 6,000 samples taken from 6 rivers, 29 creeks, and 3 lakes. The report focuses on four key pollutants – phosphorus, E. coli bacteria, copper and zinc.

 

The WEPP also carries out a Biological Assessment Program that looks at the biological health of our surface waters. In this Program, our staff identify the number of fish species present in Ottawa’s streams and rivers, monitor their health and determine the levels of contaminants present. Staff also look at other factors that are critical to the health of aquatic communities such as stream temperature, the diversity of benthic invertebrates (bottom-dwelling aquatic insects) and the levels of dissolved oxygen, suspended solids, phosphorus and key metals in surface waters.

 

The Baseline Water Quality Monitoring Program, complemented by the Biological Assessment Program, has given valuable insight into the current water quality in Ottawa’s rivers and streams. The major conclusions drawn from the analysis of the monitoring data include the following:

 

u      Water quality in the City’s major rivers is generally good to excellent. This is good news for City residents in general and for swimmers, boaters and anglers in particular.

 

u      Water quality tends to degrade as tributaries get smaller. This reflects the lesser ability of small streams to tolerate pollution. Since these ultimately impact all receiving water, we need to remember that it is important to protect water quality in the smallest of streams if we want to continue to enjoy good water quality in our rivers.

 

u      Phosphorus levels are a concern City-wide except for in the main channels of the Ottawa and Mississippi Rivers. This reflects the large number of point and non-point sources of this universal pollutant. We need to continue to tackle the phosphorus issue in order to keep our watercourses aesthetically pleasing, free of algae blooms and healthy for fish.

 

u      With the exception of a few localized areas, E. coli levels, on average, are not a concern in the major rivers for body contact recreation. Average concentrations in urban creeks exceed Federal and Provincial water quality targets. The majority of rural creeks meet the targets.

 

Metals (especially copper) tend to be a concern in smaller tributaries in urban areas, reflecting the inputs from roads, parking lots, and other potential pollution sources. With few exceptions, the smaller tributaries in rural areas meet Federal and Provincial targets.

 

u      Surrounding land uses can have significant impacts on water quality. While many people link poor water quality to urbanization, our data show that poor water quality can be found in both urban and rural streams.

 

u      Nine areas of concern were identified during the analysis of the data, mostly on particular small tributaries.

 

Detailed, ongoing monitoring is necessary to understand interactions between the environment and the waterways.  This is the first step in improving and protecting their health. The City’s Water Environment Protection Program has had a number of notable successes in terms of protecting and enhancing the health of our rivers and streams. To build on these successes, WEPP plans to:

 

u      continue the Baseline Monitoring Program across the City to provide an ongoing assessment of the health of the aquatic environment and identify areas of concern for further investigation or rehabilitation;

 

u      investigate expanding the Baseline Monitoring Program to assess the bioaccumulation of toxins such as heavy metals, to provide early identification of waterways that are subject to this type of pollution;

 

u      enhance the water quality monitoring programs currently in place to provide information on existing pollution sources in order that they may be targeted for elimination;

 

u      assess the impact of new developments, rehabilitative measures and changes to open spaces on our waterways so that the information can be used for better watershed management and decision making;

 

u      continue supporting the Public Health Branch in the investigation and elimination of sources of contamination in an effort to minimize the number of beach closures;

 

u      use existing stream assessment data to provide the foundation for determining a stream rehabilitation strategy for all City watersheds;

 

u      report regularly on water quality results and continue to make data available on request to external agencies, organizations and individuals;

 

u      investigate the use of Web-based applications to make water quality information such as beach survey results and fisheries assessments more accessible to the public; and

 

u      continue working with water quality partners to protect fish habitat and the fisheries community.

 

 

 

 

 


OUR RIVERS ARE IMPORTANT

 
 

 

 


Text Box:  The history of the City of Ottawa is inextricably linked to its rivers. The first inhabitants of the area, the aboriginal people, used the Ottawa River as a transportation route. The first European explorer, Samuel de Champlain paddled up the Ottawa River in 1611 to explore the vast interior of New France and opened the door to all those who followed. In his wake came other explorers, adventurers, fur traders, and later the loggers who sent vast rafts of logs down the river to the mills of Bytown and the ships of Montreal. The settlement of Bytown (now Ottawa) was established at the place where the Rideau and Ottawa Rivers meet. The building of the Rideau Canal between 1826 and 1832 – an extraordinary feat of construction for its time -- was a defining event in the City’s history.

 

The Ottawa of today is still very much influenced by the rivers and streams that run through it. The City is blessed with an extensive network of watercourses that includes the Mississippi, South Nation, Rideau and Ottawa Rivers and their tributaries. These watercourses -- all 4,500 km of them -- are invaluable and irreplaceable resources. Like the arteries and veins in our bodies, they sustain life in the City. They provide us with water for farms, industries, institutions and homes. They recharge groundwater and support complex communities of wildlife. They provide beauty, unparalleled vistas and a host of recreational opportunities for residents and visitors alike.

 

The City’s Goal of Clean Water

Text Box: Why Should We Care about Rivers?

Healthy rivers provide a wide range of benefits to society. They:

·	sustain wetlands and provide habitat for aquatic communities;
·	provide clean water for drinking,  agricultural and industrial use;
·	support recreational activities such as angling, swimming, boating and cottaging;
·	provide economic benefits from water-related investment, tax dollars and visitor spending; and
·	provide aesthetic enjoyment.


A healthy environment is vital for quality of life and the long term sustainability of communities. The new City of Ottawa Growth Management Plan (Ottawa 20/20) recognizes and endorses this idea. One of Ottawa 20/20’s seven guiding principles is “A Green and Environmentally Sensitive City” and one of the goals under this principle is the goal of clean water. In the City’s Environmental Strategy this goal is defined as:

 

·         drinking water that is safe to consume;

·         healthy groundwater aquifers; and

·         rivers, creeks and lakes that support healthy aquatic environments.

 

The Water Environment Protection Program is one of the key internal departments charged with helping to achieve the City’s goal of clean water.  This document explains how we do this.
Text Box: Surface Water Facts

Did You Know…

The City of Ottawa has more than 4,500 km of rivers, streams and creeks. 

Large rivers make up only 3% of the 4,500 km of watercourses in the City.

47 different species of fish have been identified by City staff in our waterways.

Three of our streams are classified as coldwater streams, which means they support brown trout and other sensitive species.  

Muskie, pike, smallmouth bass, largemouth bass and walleye can be found right in the heart of Ottawa in the Rideau River.

Ottawa now has four lifeguard-supported urban swimming beaches.

The Rideau River is designated as a Canadian Heritage River because of its historical and ecological values.

Every year, some 90,000 boats pass through the locks on the Rideau Canal.

The Rideau Canal is the oldest continuously operated canal in North America. Many of its hand-operated locks use the original mechanisms installed in 1832.

Ottawa’s lakes, streams and rivers generate many millions of dollars in economic benefits from tourism, cottaging and angling.

About this Document

This document has been prepared by the City of Ottawa’s Water Environment Protection Program (WEPP) to provide up-to-date information on the condition of Ottawa’s surface water resources. It describes the City’s network of rivers and streams and WEPP’s role in maintaining them in a healthy state. It also outlines the City’s ongoing program to monitor water quality -- the Baseline Water Quality Monitoring Program – and explains why we monitor, what we monitor and how we do it. The document presents key findings from seven years of extensive water quality monitoring representing some 6,000 samples taken from 3 rivers and 29 creeks. From these results, we draw conclusions about the health of our rivers and streams, and we identify key issues and problem areas that need to be addressed. The document’s Appendix provides links to additional resources for those interested in getting more information on water quality or helping to protect our rivers and streams. We invite you to join us on a tour of Ottawa’s rivers and streams!

 

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THE WATER ENVIRONMENT PROTECTION PROGRAM

 

 

 

 


Text Box:  Who Are We?

The Water Environment Protection Program was established in 1992 by the former Regional Municipality of Ottawa-Carleton to protect Ottawa’s streams and rivers and to ensure that they remain healthy for future generations. It does this by assessing the state of the City’s surface waters and coordinating actions to protect and improve their health. WEPP carries out comprehensive water quality monitoring and tracks changes in water quality over time. When sources of pollution are identified, City staff initiate corrective action and coordinate action plans with conservation authorities and Provincial and Federal agencies.

 

A key component of WEPP’s work is our Baseline Water Quality Monitoring Program that provides ongoing information on the condition of surface waters. The Program tracks water quality in 3 rivers and 29 creeks. The information gathered in the Program is used in three ways. It provides reference information that is used for ongoing municipal planning and design purposes; it is also used to track water quality changes over time, identify pollution threats and water quality problems; and it is used to evaluate the success of rehabilitation or restoration efforts to make sure resources are used wisely. This document reports on the results of water quality monitoring for the seven years between 1998 and 2004. More detailed information on the Baseline Water Quality Monitoring Program can be obtained from WEPP staff.

 

Text Box:  The WEPP also carries out a Biological Assessment Program that looks at the biological health of our surface waters. In this Program, our staff identify the number of fish species present in Ottawa’s streams and rivers, monitor their health and determine the levels of contaminants present. Staff also look at other factors that are critical to the health of aquatic communities such as stream temperature, the diversity of benthic invertebrates (bottom-dwelling aquatic insects) and the levels of dissolved oxygen, suspended solids, phosphorus and key metals in surface waters.

 

The WEPP is also involved in long term planning through the development of subwatershed studies, such as those done for the Carp River, Shields Creek, Jock River Reaches 1 and 2 and Mud Creek.  Subwatershed studies are developed to protect, enhance and restore natural resources in a subwatershed over time.

 

 


Text Box:  Why Do We Monitor?

Water quality monitoring is important for many reasons. It can help answer questions about the condition of a body of water (i.e., the levels of pollutants). It can also tell us about the stresses on water (the loadings of pollutants) and our responses (the effectiveness of our protection, mitigation and restoration programs). The data collected over time in monitoring program locations can shed light on trends, relating both to space and time. Baseline information – such as that reported on here -- can also be used as a yardstick against which the condition of other water bodies can be measured. 

 

Water quality is both a fundamental component of a healthy natural environment and an indicator of health.  Understanding the health of our rivers and streams is a vital part of taking action to protect the natural environment. The water quality data and information collected by the WEPP is used by internal City departments to focus investigations, inform planning, and guide restoration and remediation efforts where it is most needed. It is also used by external agencies, such as the Ministry of Natural Resources (MNR), the Department of Fisheries and Oceans (DFO) and the three Conservation Authorities in the area. The data and information collected by the WEPP augments that collected by the Conservation Authorities, which is collected for different reasons and at a different scale (watershed-wide rather than City-wide).

 

Good information is the cornerstone of good planning. Having a databank of good water quality information allows WEPP to apply “adaptive management” strategies for Ottawa’s rivers and streams. In simple terms, this means that through monitoring we can identify water quality problems, and then develop strategies to address them. Ongoing monitoring allows us to see if our efforts have been successful, and then adjust or adapt them if necessary to achieve our objectives.

 

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What Have We Achieved?

The City’s Water Environment Protection Program has contributed greatly to the protection and enhancement of water quality in our rivers and streams. Information collected has been used to eliminate pollution sources and to help guide environmentally friendly development.  Some of our “success stories” include:

 

·         pinpointing and repairing hundreds of cross-connected sewers;

·         identifying and mitigating a wide range of pollution sources including illegal sewer connections and industrial discharges;

·         identifying gulls as a source of contamination, resulting in the installation of gull wires at Britannia and Mooney’s Bay beaches, reducing pollution from birds, improving water quality and reducing beach closures;

·         in partnership with Parks Canada, changing how the levels in the Rideau River are altered to reduce impacts on fish communities; and

·         monitoring stormwater management facilities after improvements are made to ensure that water quality is protected.

 

 

 

 

SPOTLIGHT ON THE BASELINE WATER QUALITY PROGRAM

 
 

 


How We Measure Water Quality

Text Box: Key Indicators of Water Quality

Phosphorus is a nutrient that is essential for life. However, in aquatic systems, too much phosphorus can lead to excessive growth of aquatic plants, the creation of unsightly mats of algae, and the depletion of oxygen, which limits the ability of fish to survive. Phosphorus comes from many sources including sewage treatment plants, stormwater, industrial wastes and fertilizers.

Escherichia coli (or E. coli)) is a bacterium that indicates the presence of human sewage and animal manure. It can enter rivers through direct discharge from mammals and birds, from agricultural and storm runoff carrying mammal wastes (manure), and from sewage leaked or deliberately discharged into the water. E. coli are also indicators of the possible presence of other disease causing organisms or pathogens.

Copper and zinc are naturally occurring metals that are essential for life in trace amounts. At high concentrations, they can be hazardous to both humans and aquatic life. Copper and zinc typically enter watercourses in stormwater, which picks up the metals from roads and parking lots or through atmospheric deposition.

In the City’s Baseline Water Quality Monitoring Program, water samples are evaluated against three sets of criteria – the Provincial Water Quality Objectives (PWQO), the Canadian Water Quality Guidelines (CWQG) for the Protection of Aquatic Life, and the Canadian Council of Ministers of the Environment (CCME) Water Quality Index. The Provincial objectives and Federal guidelines are set at levels that protect all forms of aquatic life and protect recreational uses based on public health and aesthetic considerations. The CCME Water Quality Index is a useful communications tool that translates complex water quality data into simple terms (e.g., excellent, good, poor) for reporting. Like the Provincial Air Quality Index, the Water Quality Index gives information on overall water quality without being specific.

 


How We Monitor Water Quality

The City’s Baseline Surface Water Quality Monitoring Program is designed to monitor water quality across the City and identify long term trends. The Program uses 91 sampling points that are sited to give coverage of the major rivers, major tributaries and smaller tributaries. Sampling is done monthly at each monitoring site unless conditions (such as ice cover) prohibit it. From 1998 to 2004, each monitoring site was sampled between 56 and 84 times.

 

Each sample is analysed for 43 different parameters or water quality attributes. The results for four key pollutants of concern – phosphorus, E. coli, copper and zinc – are provided in this report.

 

 

 

Text Box:

Text Box:  Text Box: Algae blooms on the Rideau River at the Black RapidsText Box:


Text Box:  Text Box: Figure 1: Major Watersheds and Tributaries

 

 

 

 


 

INTRODUCING OTTAWA’S RIVERS AND STREAMS

 

 
 


Major Rivers

Within its boundaries, the City of Ottawa has portions of four watersheds – the Ottawa, the Mississippi, the Rideau and the South Nation -- see Figure 1. Each of these watersheds has a distinct identity that is shaped by geology and land use. While these large rivers are highly visible and fairly well known, it is interesting to note that they make up only 3% of the 4,500 km of streams and rivers in the City. This underscores the importance of the 97% of stream length that is made up of a few large tributaries and hundreds of small streams.

 

Land Use in the Major Watersheds Within the City Limits

 

Watershed

Total Area

(km2)

Forest

%

Urban

%

Agriculture

%

Water

%

% within Ottawa

Ottawa

146,222

75

<1

10

13

2

Mississippi

4,059

70

<1

15

15

4

Rideau

3,935

44

4.5

38

16

23

South Nation

4,184

35

1

62

2

15

 

 

Text Box:  Ottawa River

The Ottawa River is over 1,200 km in length and drains a huge area (over 140,000 km2). Only 2% of the river lies within the City’s boundaries. From its source in Lake Capimitchigama in western Quebec, the Ottawa River flows to Lake Temiskaming and then southeast to empty into the St. Lawrence River at Montreal. The characteristics of the Ottawa River reflect the landscape through which it flows, which is dominated by the forested Canadian Shield, relatively little agricultural land use and less than 1% urbanization. This leads to river water that is generally of good quality, but which is relatively sensitive to pollutants.

 

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Mississippi River

The Mississippi River is about 160 km in length and drains an area of 4,059 km2. Only 4% of the river lies within the City’s boundaries. The source of the Mississippi is east of the Kawartha Lakes. From there it flows northeast to empty into the Ottawa River just east of Arnprior. Upstream of the City’s boundaries the Mississippi flows through a typical Canadian Shield landscape dominated by forests. There is relatively little agricultural land use in the watershed and only 1% urbanization. Similar to the Ottawa River, the water quality in the Mississippi is generally of good quality, and is relatively sensitive to pollutants.


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Rideau River

The Rideau River is 146 km in length and drains an area of 3,935 km2. About 23% of the watershed lies within the City boundaries. It originates in Upper Rideau Lake and empties into the Ottawa River at Rideau Falls. The Rideau River is distinctly different from Ottawa’s other large rivers, in that its water levels are regulated from May to October so that the canal can provide deep enough water for boat passage. During the navigation season, upstream of the Hog’s Back lock, this means that the river has more of the characteristics of a shallow reservoir than a river. Downstream of the Hog’s Back lock, where the canal is separate from the river, the Rideau reclaims its free-flowing identity. The upper third of the Rideau River watershed flows through the granite of the Canadian Shield, while the lower two-thirds flows through limestone. This geology affects water quality in the river, as does the land use, which is more urbanized and has more agriculture than either the Ottawa or the Mississippi Rivers. 

 

Text Box:  


South Nation River

The South Nation River is 175 km in length and drains an area of 4,184 km2. About 15% of the watershed lies within the City boundaries. From its headwaters north of Brockville, the South Nation River flows northeast and empties into the Ottawa River near Plantagenet. Water quality in the South Nation is influenced by the limestone geology through which it flows and the dominance of agricultural land use (62% of the watershed). The main branch of the South Nation River does not flow through the City of Ottawa, so for water quality monitoring purposes, it is addressed under its major tributaries (the Castor River and Bear Brook), which are introduced in the next section.

 

 

Major Tributaries

The City’s “major tributaries” are the smaller rivers and large streams that drain areas greater than 300 km2 in size and which empty into one of our major rivers. There are four of these within the City of Ottawa and their location is shown in Figure 1. These are:

 

·         the Carp River, the only major tributary that is wholly contained within the City of Ottawa, which drains directly into the Ottawa River;

 

·         the Jock River, which drains into the Rideau River;

 

·         the Castor River, which drains into the South Nation River; and

 

·         Bear Brook Creek, which drains into the South Nation River.

 


Smaller Tributaries

Text Box:  Text Box: The Importance of Small

Some ecologists use a tree as an analogy for a river system. In this analogy, the trunk is the river, the large branches are the major tributaries, and the small branches are the smaller tributaries. The small branches of a tree are where all the work
gets done, where 
photosynthesis takes
place. Without its 
small branches, a 
tree will die. The same
holds for river systems:
if the smallest streams 
are removed, the entire
river system will be 
affected.


The City of Ottawa contains hundreds of smaller tributaries including streams, brooks and intermittent watercourses. While these may seem to be less valuable than large rivers and major tributaries, they are fundamentally important to ecological health and in many cases are irreplaceable. These small tributaries provide drainage and vital aquatic habitat for a wide variety of aquatic organisms. Because of their size, however, small tributaries are more sensitive to pollution than larger watercourses.

 

Text Box:  Text Box:  Text Box:

WHAT DID WE FIND?

 

 
 


The monitoring results for the seven years between 1998 and 2004 have been summarized below with respect to the percentage of samples that meet the Provincial and Federal water quality targets. It should be noted that this is an overall assessment.  There are some exceptions to the overall assessment, for example, rural creeks where water quality is very good. The water quality results at each of the monitoring stations are mapped on Figure 2 (for phosphorus) and Figure 3 (for E. coli).

 

Rating System and Colour Coding

Rating

% Samples Meeting

Water Quality Targets

What it Means

Excellent

95 to 100

Rarely failed to meet targets

Good

80 to 94

 

Fair

65 to 79

Exceeded targets occasionally

Marginal

45 to 64

 

Poor

0 to 44

Exceeded targets often or significantly

 

Major Rivers

Water quality in the Ottawa, Mississippi and Rideau Rivers is generally good to excellent. This is largely due to the relatively low proportion of urban development and agriculture in their watersheds.

The exception to the overall “good to excellent” assessment of the City’s major rivers is the levels of phosphorus in the Rideau River, which is marginal. Only about 45% of samples taken from the Rideau met water quality targets for phosphorus. (By comparison, 100% of samples from the Ottawa and 86% of samples from the Mississippi met the water quality targets for phosphorus).

 

Major River

Phosphorus

E. coli

Copper

Zinc

Ottawa River

Excellent

Good

Good

Excellent

Mississippi River

Good

Good

Excellent

Excellent

Rideau River

Marginal

Good

Good

Excellent

 

Major Tributaries

Water quality in the City’s major tributaries varies from poor to excellent, depending on the pollutant.  Levels of metals are good to excellent, although copper is rated as marginal for Bear Brook. E. coli levels are fair in the Jock River and marginal in the other major tributaries. Phosphorus levels are marginal in the Jock River and poor for the other three major tributaries. Of the four major tributaries, Bear Brook has the poorest rating for all four pollutants.

 

Major Tributary

Phosphorus

E. coli

Copper

Zinc

Carp River

Poor

Marginal

Good

Excellent

Jock River

Marginal

Fair

Good

Excellent

Bear Brook

Poor

Marginal

Marginal

Good

Castor River

Poor

Marginal

Good

Excellent

 

Smaller Tributaries

Water quality in the City’s smaller tributaries varies from poor to excellent, depending on the pollutant. Phosphorus levels are rated as poor in both rural and urban areas, and E. coli levels are poor in urban creeks and marginal in rural creeks. In terms of the frequency of meeting water quality targets, urban creeks are worse than rural creeks. The higher levels of metals in urban creeks reflect the influence of urban runoff from roads and parking lots.

 

Small Tributary

Phosphorus

E. coli

Copper

Zinc

Urban Creeks

Poor

Poor

Fair

Good

Rural Creeks

Poor

Marginal

Good

Excellent

 

Areas of Concern

Dominant Upstream

Land Use

Area of Concern

Urban

Bilberry Creek

Green Creek at Montreal Road

Green Creek at Innes

Rural

Bear Brook at Boundary Road/RR#4

Becketts Creek

Cardinal Creek

Flowing Creek at Richmond

Mixed

Casey Creek at Dunrobin Road

Green Creek downstream of Ramsay Creek

Nine areas of concern were identified during the analysis of the data. These areas are monitoring stations on particular small tributaries in which high levels of phosphorus, E. coli and metals were found. Some of these tributaries drain urban areas, some drain rural areas, and some drain areas with mixed land use.

 

Trends Noted

With the exception of the main channels of the Ottawa and Mississippi Rivers, phosphorus is a concern in all the City’s rivers and streams. In all watercourses other than the Ottawa and Mississippi Rivers, phosphorus levels are rated as poor or marginal and average concentrations exceed water quality targets.

 

E. coli is not a concern in the major rivers. The Rideau River has the lowest average E. coli concentration of all the watercourses sampled. The highest average concentrations of E. coli are found in Bear Brook and in the urban creeks.

 

In general, average concentrations of metals are not a concern. The exception to this is the average concentration of copper in Bear Brook, which exceed water quality targets. The highest average concentration of zinc is seen in urban creeks. As noted above, this reflects the extent of urban runoff from roads and parking lots.

 

Overall, water quality tends to decline as the size of waterbodies decreases.

 

Increasing levels of phosphorus and E. coli are seen on the Ottawa River downstream of the urban area. This is due to the influence of the Rideau and Gatineau Rivers, stormwater from the City of Ottawa, and the wastewater treatment plants that serve Ottawa and Gatineau.

 

Increasing levels of E. coli are seen in the Rideau River with distance downstream. However, the variability of levels suggests the influence of local sources rather than a cumulative effect. A significant increase in phosphorus levels is noted when the river reaches the Black Rapids. This is likely the influence of some rural tributaries, which empty into the Rideau upstream from the Black Rapids.

 

Increased levels of phosphorus and zinc are seen in the City’s tributaries during the spring melt, when runoff picks up pollutants from farms, yards, roads and parking lots.

 

A key question with monitoring is whether water quality conditions are getting better over time or worse.  Statistically, trends through time would not generally expect to be clearly evident until approximately ten years of data are available.  Therefore, continued monitoring is advisable in order to verify the trends that have emerged to date and note those that may not yet have become apparent.


 
Text Box: Figure 2: Phosphorus Levels at Monitoring Stations (1998 – 2004)

 


 
Text Box: Figure 3: E.coli Levels at Monitoring Stations (1998 – 2004)

 


 

WHAT DOES IT ALL MEAN?

 
 

 


The Baseline Water Quality Monitoring Program, complemented by the Biological Assessment Program, has given us valuable insight into the water quality of Ottawa’s rivers and streams. The major conclusions drawn from the analysis of the monitoring results are presented below.

 

u      Water quality in the City’s major rivers is generally good to excellent. This is good news for City residents in general and for swimmers, boaters and anglers in particular.

 

u      Water quality tends to degrade as tributaries get smaller. This reflects the lesser ability of small streams to tolerate pollution. Since these ultimately impact all receiving water, we need to remember that it is important to protect water quality in the smallest of streams if we want to continue to enjoy good water quality in our rivers.

 

u      Phosphorus levels are a concern City-wide except for in the main channels of the Ottawa and Mississippi Rivers. This reflects the large number of point and non-point sources of this universal pollutant. We need to continue to tackle this pollutant in order to keep our watercourses aesthetically pleasing, free of algae blooms and healthy for fish.

 

u      With the exception of a few localized areas, E. coli levels, on average, are not a concern in the major rivers for body contact recreation. Average concentrations in urban creeks exceed Federal and Provincial water quality targets. The majority of rural creeks meet the targets.

 

u      Metals (especially copper) tend to be a concern in smaller tributaries in urban areas, reflecting the inputs from roads, parking lots, and other potential pollution sources. With few exceptions, the smaller tributaries in rural areas meet Federal and Provincial targets.

 

u      Surrounding land uses can have significant impacts on water quality. While many people link poor water quality to urbanization, our data shows that poor water quality can be found in both urban and rural streams, usually for different reasons.

 

 

LOOKING FORWARD

 
 

 

 


Detailed, ongoing monitoring is necessary to understand interactions between the environment and the waterways.  This is the first step in improving and protecting their health. The City’s Water Environment Protection Program has had a number of notable successes in terms of protecting and enhancing the health of our rivers and streams. To build on these successes, WEPP plans to:

 

u      continue the Baseline Water Quality Monitoring Program across the City to provide an ongoing assessment of the health of the aquatic environment and identify areas of concern for further investigation or rehabilitation;

 

u      investigate expanding the Baseline Monitoring Program to assess the bioaccumulation of toxins such as heavy metals, to provide early identification of waterways that are subject to this type of pollution;

 

u      enhance the water quality monitoring programs currently in place to provide information on existing pollution sources and initiate corrective actions for their elimination;

 

u      assess the impact of new developments, rehabilitative measures and changes to open spaces on our waterways so that the information can be used for better watershed management and decision making;

 

u      continue supporting the Public Health Branch in the investigation and elimination of sources of contamination in an effort to minimize the number of beach closures;

 

u      use existing stream assessment data to provide the foundation for determining a stream rehabilitation strategy for all City watersheds;

 

u      report regularly on water quality results and continue to make data available on request to external agencies, organizations and individuals;

 

u      investigate the use of Web-based applications to make water quality information such as beach survey results and fisheries assessments more accessible to the public; and

 

u      continue working with water quality partners to protect fish habitat and the fisheries community.

 

 

 


APPENDIX A:  RESOURCES

 

 
 

 

 


There are many Web-based sources of information on the health of Ottawa’s surface water resources and programs that contribute to reducing pollution. Some are listed below, along with links for people who are interested in helping to improve the health of our lakes, streams and rivers.

 

Getting Information

 

¨           LandOwner Resource Centre: The LRC was established by the Rideau Valley Conservation Authority in 1993 to provide “one stop shopping” for rural landowners. The Centre, located in Manotick, provides information on issues relating to woodlot management, insects and pests, water, wildlife and conservation of wetlands. For more information, see http://www.lrconline.com/index.htm

 

¨           Water Efficiency:  Conserving water is good for the environment because it reduces the impact on water resources and reduces the energy required to treat and transport the water. It is also good for the economy because it is cheaper to conserve water than it is to build new treatment capacity. The City of Ottawa’s Web site has information on how residents can become more water efficient, both inside and outside the house. For more information, see http://ottawa.ca/City_services/water/efficiency/index_en.shtml

 

¨           Rideau Valley Conservation Authority:  The RVCA Web site provides data and information on the characteristics of the Rideau watershed and RVCA’s programs, publications and news. For more information, see http://www.rideauvalley.on.ca/

 

¨           Mississippi Valley Conservation Authority: The MVCA’s Web site provides information on water management, water planning and regulations, and conservation education programs. For more information, see http://www.mvc.on.ca/index.html

 

¨           South Nation Conservation: The SNC Web site provides information on the history of the South Nation watershed, SNC’s programs and services, recreational resources and news and events. For more information, see http://www.nation.on.ca/English/index.htm

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¨           The Nature of the Rideau River:  This Web site was established by the Canadian Museum of Nature. It provides information on the history and geography of the river, along with information on water quality and biodiversity. The Rideau River Biodiversity Project, carried out by the CMN and the former Regional Municipality of Ottawa-Carleton, identified the number of species of aquatic plants, aquatic birds, fish, mussels, invertebrates, amphibians and reptiles in various parts of the Rideau River. For more information, see http://www.nature.ca/rideau/index-e.html

 

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Getting Involved

 

¨           City Stream Watch: This is a partnership involving the Rideau Valley Conservation Authority, the City of Ottawa, and four other partners. The Program trains volunteers to monitor local streams for water temperature, fish habitat potential and other characteristics. Founded in 2003, the program now includes stream cleanup, shoreline rehabilitation, shoreline plantings and fish habitat improvements. For information, see http://www.rideauvalley.on.ca/programs/streamwatch/

 

¨           Friends of the Carp: Friends of the Carp is a group of volunteers that are dedicated to improving the quality of the Carp River. The group is focused on restoring shoreline vegetation along the river for the benefit of both human and wildlife communities. For more information, see http://www.friendsofthecarpriver.com/

 

¨           Rural Clean Water Program: This Program was developed by the City of Ottawa in cooperation with local farm and rural organizations and universities. Administered by the Conservation Authorities, the Program offers grants and technical assistance for rural projects to reduce pollution. These include improving manure storage, repairing septic systems, establishing buffers, reducing soil erosion and improving cropping practices. For more information, contact the Landowner Resource Centre at http://www.lrconline.com/index.htm

 

¨           Friends of Jock River: The Friends of the Jock River is a non-profit, charitable environmental organization managed by volunteers in the Jock River watershed. Its mandate is to protect the Jock River watershed ecosystem. For more information, see http://www.geocities.com/jockriver/

 

¨           Ottawa Riverkeeper: Ottawa Riverkeeper is a citizen-based organization that is aimed at achieving a healthy, ecologically sustainable Ottawa River. The organization is open to all individuals and groups with a commitment to and interest in the ecological welfare of the Ottawa River.  For more information, see http://www.ottawariverkeeper.ca/main.php

 

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