St. Lawrence River
Ontario, Canada
Location created by
River Institute
- Group: River Rapport & Education : River Institute
- Lat: 45.0108991
- Lng: -74.9418402
- Waterbody Type: River
- Timezone: America/Toronto
Latest photos
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Observation tests summary
Air temperature
°C
11.0
Latest
25.7
Average
Water temperature
°C
15.8
Latest
23.7
Average
Alkalinity
mg/L
80
Latest
128
Average
Hardness
mg/L
50
Latest
85
Average
Dissolved oxygen
mg/L
5.0
Latest
9.4
Average
Conductivity
μS/cm
275
Latest
287
Average
Secchi depth
m
0.0
Latest
0.2
Average
Water depth
m
0.3
Latest
0.7
Average
pH (0-14)
7.5
Latest
8.3
Average
Chlorine
ppm
0.0
Latest
0.0
Average
Nitrates
mg/L
0.2
Latest
0.2
Average