Rainy River District County, Ontario · Water Quality Report Card
Heron Lake
Heron Lake in Rainy River District, Ontario received a water quality grade of B (Good). Water clarity: 1.5 m visibility. Phosphorus: 12.5 µg/L.
- Clarity
- 1.5 m
- Type
- Mesotrophic
Heron Lake is a mesotrophic lake in Rainy River District County, Ontario. Water quality is graded B based on 2 sampling years through 2017. Compared to the 79 other monitored lakes in Rainy River District County, Heron Lake ranks #66 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2017-05-08. Grade methodology: LakeGrade methodology.
Watch Heron 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
Murky, only visible to about 4.9 ft. Phosphorus level: 12.5 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.5 m | D |
| Phosphorus | 12.5 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Heron Lake
Compare lakeside cabins, hotels, and vacation rentals near Heron Lake in Rainy River 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 Heron 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 Heron Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Heron Lake — straight to your inbox. No spam, unsubscribe anytime.
Fishing Heron Lake
Location
County Ranking
Ranked #66 of 80 lakes in Rainy River District
Cleaner Lakes Within 30 Miles
Heron Lake holds Grade B. 4 nearby lakes hold higher grades.
- AEntwine LakeKenora District · 15.4 mi · Higher grade (B → A)
- ABad Vermilion LakeRainy River District · 14.5 mi · Higher grade (B → A)
- APettit LakeRainy River District · 17.6 mi · Higher grade (B → A)
- BOtukamamoan LakeRainy River District · 8.5 mi · Higher overall water quality score
Nearby Lakes in Rainy River District
Explore Heron 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 Heron 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: 2017-05-08
Monitoring stations: