Montreal Rd. Culvert outflow : St. Lawrence River

Cornwall, Ontario, Canada

Observed by
Katherine Tieman

Observed on: Fri, 25 Jul 2025 10:30:00 -0400
Testers Katherine Tieman
Associated with:
River Institute : Upper St. Lawrence River Volunteer Monitoring
Lat: 45.0178305
Lng: -74.7007442

Observation report

Pending Quality Check from Water Rangers What's this?

pH (0-14) 8.0

Dissolved oxygen mg/L 8.0

Secchi depth m bottom visible

Chlorine ppm 0.0

Hardness mg/L 180.0

Alkalinity mg/L 85.0

Water depth m 0.53

Conductivity μS/cm 764.0

Air temperature °C 22.0

Water temperature °C 21.1

Insect

Current weather

Both sun and cloud, had just finished raining directly prior

Weather in previous 24 hours

Big thunderstorm overnight and smaller showers most of the morning

No photos uploaded.

Foam on surface, was slowly dissipating outside of pool but did not disappear immediately and is not normal, construction on road