St. Lawrence River
Ontario, Canada
Location created by
River Institute
- Group: River Rapport & Education : River Institute
- Lat: 45.0111657
- Lng: -74.7337608
- Waterbody Type: River
- Timezone: America/Toronto
Latest photos
Observations summary
Observation tests summary
Air temperature
°C
23.0
Latest
23.7
Average
Water temperature
°C
18.0
Latest
22.2
Average
Alkalinity
mg/L
150
Latest
121
Average
Hardness
mg/L
120
Latest
152
Average
Dissolved oxygen
mg/L
9.0
Latest
8.6
Average
Conductivity
μS/cm
266
Latest
276
Average
Secchi depth
m
0.0
Latest
0.0
Average
Water depth
m
0.4
Latest
0.4
Average
pH (0-14)
8.0
Latest
7.6
Average
Dissolved oxygen
%
94.7
Latest
94.7
Average
Turbidity
NTU
0.8
Latest
0.8
Average
Chlorine
ppm
0.0
Latest
0.0
Average