Big Rideau Lake

Portland, Ontario, Canada

Observed by
Ann White

Water Quality Tests

pH (0-14) What's this? 8.4
Dissolved Oxygen (mg/L) What's this? 6.0
Secchi Depth (m) What's this? 1.0
Chlorine (ppm) What's this? 3.0
Hardness (mg/L) What's this? 100.0
Alkalinity (mg/L) What's this? 120.0
Water Depth (m) What's this? 1.2
Conductivity (uS/cm) What's this? 237.0
Air Temperature ℃ What's this? 35.0
Water Temperature ℃ What's this? 30.4


Current Weather What's this?
  • sunny
Hot, humid, clouds forming, light wind
Weather in previous 24 hours What's this?
  • sunny
Hot, humid, clouds forming

Latest Photos


Water brown, muddy, smell of gas and gas film on the water. Two 2-inch minnows near the surface. Redwing blackbirds in bullrushes across the channel.

The resident informed me that seaweed removal boat had cleaned the channel out of algae and weeds which was almost grown over. They made about three passes up and down the channel to complete the task, he said.

Now there is a clear channel from the dock location where the test was done out to the water area by the Bayview marina.