![](https://cdn.waterrangers.ca/attachments/1d2f92f53d55294080ef9bd577facb811c5e0ac5/store/fill/300/300/52f454ee7b479f1d7c7e721a5a3e781d6299104b01ab1659f433cd98f175/image_354974192.jpg)
Big Rideau Lake
Portland, Ontario, Canada
![](https://cdn.waterrangers.ca/attachments/abc97dc93d563304ba86462f36edc7508a29e235/store/fill/150/150/2a69476a26315ed1e54dea9a44b745befb28120962fb3061453fbd693d2f/IMG_6822.jpg)
Location created by
Doris Albert
- Group: Big Rideau Lake Association : Big Rideau Lake Water Quality
- Lat: 44.6992266
- Lng: -76.1923058
- Waterbody Type: Lake
- Timezone: America/Toronto
Latest photos
View all photosObservation tests summary
Air temperature
°C
19.5
Latest
25.5
Average
Water temperature
°C
20.3
Latest
21.5
Average
Alkalinity
mg/L
60
Latest
85
Average
Hardness
mg/L
10
Latest
35
Average
Dissolved oxygen
mg/L
10.0
Latest
7.2
Average
Chlorine
ppm
0.0
Latest
0.0
Average
Conductivity
μS/cm
197
Latest
193
Average
pH (0-14)
8.0
Latest
7.8
Average
Secchi depth
m
2.3
Latest
3.0
Average
Water depth
m
2.3
Latest
3.0
Average
Ice On
Ice Off
- 2022-09-25
- 2022-09-03
- 2022-07-30
- 2022-06-24
- 2022-05-30