Len's Cove Marina, Portland, on the Big Rideau

Big Rideau Lake

Portland, Ontario, Canada

Location created by
Martin Lalumière

Group: Big Rideau Lake Association : Big Rideau Lake Water Quality
Lat: 44.6980006
Lng: -76.1936992
Waterbody Type: Lake
Timezone: America/Toronto

Want to download this data? Login or Sign Up.

Latest photos

View all photos

Observation tests summary

Total kjeldahl nitrogen μS/cm

950 Latest

414 Average

2005-06-09 -> 2017-06-21

Total phosphorus ppm

0.1 Latest

17.2 Average

2005-06-09 -> 2017-06-21

Water temperature °C

26.0 Latest

21.5 Average

2008-07-23 -> 2025-07-27

Air temperature °C

27.0 Latest

24.9 Average

2010-06-08 -> 2025-07-27

Dissolved oxygen mg/L

8.0 Latest

8.4 Average

2010-06-08 -> 2025-07-27

pH (0-14)

7.7 Latest

8.0 Average

2010-08-11 -> 2025-07-27

E.coli cfu per 100mL

14 Latest

28 Average

2016-07-19 -> 2017-06-21

Conductivity μS/cm

239 Latest

226 Average

2017-06-21 -> 2025-07-27

Dissolved oxygen %

6.0 Latest

52.5 Average

2017-06-21 -> 2019-07-20

Alkalinity mg/L

50 Latest

102 Average

2018-06-02 -> 2025-07-27

Hardness mg/L

13 Latest

91 Average

2018-06-02 -> 2025-07-27

Secchi depth m

0.8 Latest

1.4 Average

2018-06-02 -> 2025-07-27

Water depth m

1.2 Latest

1.4 Average

2018-06-17 -> 2025-07-27

Chlorine ppm

0.0 Latest

0.1 Average

2019-07-20 -> 2023-09-23

Ice On

Ice Off

2022-06-24
2022-05-30