pH (0-14)
What's this?
8.4
Grays Creek Marina : St. Lawrence River
Cornwall, Ontario, Canada
Observed by
James Hardiment
- Observed on: Fri, 11 Jul 2025 14:30:00 +0000
- Lat: 45.0324967
- Lng: -74.6652589
Observation report
See trends at this locationWater quality tests
Pending Quality Check from Water Rangers What's this?
Dissolved oxygen mg/L
What's this?
7.0
Secchi depth m
What's this?
0.27
Chlorine ppm
What's this?
0.0
Hardness mg/L
What's this?
150.0
Alkalinity mg/L
What's this?
80.0
Water depth m
What's this?
0.27
Conductivity μS/cm
What's this?
446.0
Air temperature °C
What's this?
28.0
Water temperature °C
What's this?
25.9
Wildlife
Weather
Current weather What's this?
Weather in previous 24 hours What's this?
Latest photos
Notes
I see boats exiting the marina area. I see lillypads and algae. There is some natural debris, rocks, buoys and you can see people boating in the distance. Cars pass over the boats as they enter the river. Ducks are out swimming in groups. Lots of flowers, reeds on the shore. It looks like someone had burned a campfire. Water a little cloudy.