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Health of the Rideau River

 

Water Quality at a Glance:
Hogs Back to the Rideau Falls

The Rideau River near Billings Bridge.
The Rideau River near Billings Bridge.

This table uses several indicators to give an overview of the water quality of the Rideau River between Hogs Back and the Rideau Falls. Data collected in 1999 is presented. These data are representative of data recorded during the three years of the Rideau River Biodiversity Project.


Map of the Rideau River between Hogs Back and the Rideau Falls. See a detailed map of the Rideau River between Hogs Back and the Rideau Falls.

 

  Hogs Back to Rideau Falls  
Arrow.  
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Bullet. 
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 Don't Overlook...  
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image Some Results from Water Quality Research Conducted in 1999 image
Indicator
Acceptable levela Average Minimum Maximum
Description
Nitrate and Nitrite (mg/l)
Value not established 0.04 0.00 0.18
Found neither in excess nor at levels limiting to plant growth.
Phosphorus
(mg/l) a
0.03 0.027 0.022 0.032
Levels are slightly below acceptable maximums, and can encourage plant growth.
Sodium
(mg/l)
value not established 14.56 10.50 18.70 Not found in excess.
Aluminium
(mg/l) a
0.005 to 0.100 (acceptable range) 0.0769 0.0673 0.0864 Levels do not exceed acceptable maximum.
Copper
(mg/l) a
0.002 to 0.004 (acceptable range) 0.0016 0.0012 0.0019 Levels do not exceed acceptable maximum.
Iron
(mg/l) a
0.3 0.0512 0.0501 0.0523 Levels do not exceed acceptable maximum.
Dissolved Oxygen
(mg/l) a
5 to 9.5 (acceptable range) 7.26 5.16 9.17 Levels fall within acceptable range. In areas where the water depth exceeds 6.5 m, the oxygen levels were often very low.
E. coli
(CFU/100 ml) b 
200 38.5 2.0 94.0 Average level does not exceed acceptable maximum. Maximum value recorded following rainstorm.
DDT
(µg/kg dry weight) c
1.19 not available not available not available Data not available for this section of the River.
PCB
(µg/kg dry weight) c
34.1 not available not available not available
Data not available for this section of the River.

a Established in the Canadian Water Quality Guidelines for Freshwater Aquatic Life. [11]
b Established in the Guidelines for Canadian Recreational Water Quality. [15]
c Established in the Canadian Sediment Quality Guidelines for the Protection of Aquatic Life. [12]

 

A Project of the Canadian Museum of Nature
  
 Images: Canadian Museum of Nature, Diane Pathy