Parry Sound District County, Ontario · Water Quality Report Card
Blackwater Lake
Blackwater Lake in Parry Sound District, Ontario received a water quality grade of B (Good). Water clarity: 2.4 m visibility. Phosphorus: 10 µg/L.
- Clarity
- 2.4 m
- Type
- Mesotrophic
Blackwater Lake is a mesotrophic lake in Parry Sound District County, Ontario. Water quality is graded B based on 2 sampling years through 2024. Compared to the 230 other monitored lakes in Parry Sound District County, Blackwater Lake ranks #141 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2024-08-26. Grade methodology: LakeGrade methodology.
Watch Blackwater Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 7.9 ft. Phosphorus level: 10 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.4 m | C |
| Phosphorus | 10 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Blackwater Lake
Compare lakeside cabins, hotels, and vacation rentals near Blackwater Lake in Parry Sound 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 Blackwater 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 Blackwater Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Blackwater Lake — straight to your inbox. No spam, unsubscribe anytime.
Fishing Blackwater Lake
Location
County Ranking
Ranked #141 of 231 lakes in Parry Sound District
Cleaner Lakes Within 30 Miles
Blackwater Lake holds Grade B. 3 nearby lakes hold higher grades.
- AMaple LakeParry Sound District · 2.9 mi · Higher grade (B → A)
- AMartin LakeParry Sound District · 3.5 mi · Higher grade (B → A)
- ASugar LakeParry Sound District · 3.6 mi · Higher grade (B → A)
Nearby Lakes in Parry Sound District
Explore Blackwater Lake across LakeGrade
More Ontario Lake Rankings
Other Grade B Lakes in Ontario
Mesotrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Blackwater 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: 2024-08-26
Monitoring stations: