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
7.0
Latest
19.6
Average
Water temperature
°C
6.0
Latest
17.9
Average
Alkalinity
mg/L
80
Latest
119
Average
Hardness
mg/L
100
Latest
125
Average
Dissolved oxygen
mg/L
10.0
Latest
9.2
Average
Conductivity
μS/cm
266
Latest
275
Average
Secchi depth
m
0.0
Latest
0.0
Average
Water depth
m
0.4
Latest
0.4
Average
pH (0-14)
6.4
Latest
7.3
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
- 2024-11-27
- 2024-11-26
- 2024-11-14