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St.Lawrence River
Ontario, Canada
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Location created by
Julia McDiarmid
- Group: River Rapport & Education : River Institute
- Lat: 45.0168
- Lng: -74.6998999
- Waterbody Type: River
- Timezone: America/Toronto
Latest photos
View all photosObservations summary
Observation tests summary
Air temperature
°C
27.0
Latest
19.0
Average
Water temperature
°C
24.8
Latest
18.1
Average
Alkalinity
mg/L
8
Latest
128
Average
Hardness
mg/L
200
Latest
180
Average
pH (0-14)
7.2
Latest
8.9
Average
Chlorine
ppm
0.0
Latest
0.5
Average
Secchi depth
m
0.0
Latest
0.3
Average
Water depth
m
0.3
Latest
0.5
Average
Conductivity
μS/cm
307
Latest
228
Average
Dissolved oxygen
mg/L
9.0
Latest
9.0
Average