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
13.5
Latest
20.9
Average
Water temperature
°C
12.0
Latest
19.1
Average
Alkalinity
mg/L
120
Latest
119
Average
Hardness
mg/L
150
Latest
126
Average
Dissolved oxygen
mg/L
10.0
Latest
9.1
Average
Conductivity
μS/cm
270
Latest
276
Average
Secchi depth
m
0.0
Latest
0.0
Average
Water depth
m
0.4
Latest
0.4
Average
pH (0-14)
7.2
Latest
7.4
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
Ice On
Ice Off
- 2024-11-14