Cormorant Island

Big Rideau Lake

Portland, Ontario, Canada

Location created by
Gayle Mathe

Group: Big Rideau Lake Association : Big Rideau Lake Water Quality
Site ID: Cormorant Island BRLA
Lat: 44.727
Lng: -76.2298
Waterbody Type: Lake
Timezone: America/Toronto

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Latest photos

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Observations summary

Bird

Crustacean

Zebra Mussels

Observation tests summary

Air temperature °C

22.0 Latest

23.3 Average

2018-06-08 -> 2025-07-07

Water temperature °C

23.0 Latest

22.2 Average

2018-06-08 -> 2025-07-07

Alkalinity mg/L

40 Latest

90 Average

2018-06-08 -> 2025-07-07

Hardness mg/L

200 Latest

77 Average

2018-06-08 -> 2025-07-07

Dissolved oxygen mg/L

10.0 Latest

8.1 Average

2018-06-08 -> 2025-07-07

Conductivity μS/cm

233 Latest

209 Average

2018-06-08 -> 2025-07-07

Secchi depth m

0.0 Latest

2.1 Average

2018-06-08 -> 2025-07-07

Water depth m

3.5 Latest

3.9 Average

2018-06-08 -> 2025-07-07

pH (0-14)

6.4 Latest

7.5 Average

2018-06-08 -> 2025-07-07

Total dissolved solids ppm

105.0 Latest

103.5 Average

2018-08-27 -> 2020-07-25

Turbidity JTU

104 Latest

105 Average

2018-09-16 -> 2020-06-27

Chlorine ppm

0.0 Latest

0.2 Average

2019-06-28 -> 2025-07-07

Turbidity NTU

105.0 Latest

105.0 Average

2020-06-27 -> 2020-06-27

Ice On

Ice Off

2022-08-10
2022-06-20