Cochrane District County, Ontario · Water Quality Report Card
Night Hawk Lake
Night Hawk Lake in Cochrane District, Ontario received a water quality grade of D (Poor). Water clarity: 0.3 m visibility. Phosphorus: 32.9 µg/L.
- Clarity
- 0.3 m
- Type
- Eutrophic
Night Hawk Lake is a productive, nutrient-rich eutrophic lake in Cochrane District County, Ontario. Water quality is graded D based on 2 sampling years through 2015. Compared to the 134 other monitored lakes in Cochrane District County, Night Hawk Lake ranks #133 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2015-05-13. Grade methodology: LakeGrade methodology.
Watch Night Hawk Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 1 ft of visibility. Phosphorus level: 32.9 µg/L. Trophic State Index: 66.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.3 m | F |
| Phosphorus | 32.9 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 66 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Night Hawk Lake
Compare lakeside cabins, hotels, and vacation rentals near Night Hawk Lake in Cochrane District, Ontario — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Night Hawk Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Night Hawk Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Night Hawk Lake — straight to your inbox. No spam, unsubscribe anytime.
Fishing Night Hawk Lake
Location
County Ranking
Ranked #133 of 135 lakes in Cochrane District
Cleaner Lakes Within 30 Miles
Night Hawk Lake holds Grade D. 2 nearby lakes hold higher grades.
- AGibson LakeCochrane District · 8.5 mi · Two grade letters higher (D → A)
- BBarber'S Bay LakeCochrane District · 9.2 mi · Two grade letters higher (D → B)
Nearby Lakes in Cochrane District
Explore Night Hawk Lake across LakeGrade
More Ontario Lake Rankings
Other Grade D Lakes in Ontario
Eutrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Night Hawk Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2015-05-13
Monitoring stations: