Frontenac County, Ontario · Water Quality Report Card
Blue Lake
Blue Lake in Frontenac, Ontario received a water quality grade of A (Excellent). Water clarity: 11.5 m visibility. Phosphorus: 8.1 µg/L.
- Clarity
- 11.5 m
- Type
- Oligotrophic
Blue Lake is a cold, clear oligotrophic lake in Frontenac County, Ontario. Water quality is graded A based on 2 sampling years through 2004. Compared to the 106 other monitored lakes in Frontenac County, Blue Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2004-05-14. Grade methodology: LakeGrade methodology.
Watch Blue Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 37.7 ft down. Phosphorus level: 8.1 µg/L. Trophic State Index: 30.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.5 m | A |
| Phosphorus | 8.1 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 30 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Blue Lake
Compare lakeside cabins, hotels, and vacation rentals near Blue Lake in Frontenac, 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 Blue 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 Blue Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Blue Lake — straight to your inbox. No spam, unsubscribe anytime.
Fishing Blue Lake
Location
County Ranking
Ranked #5 of 107 lakes in Frontenac
Nearby Lakes in Frontenac
Explore Blue Lake across LakeGrade
More Ontario Lake Rankings
Other Grade A Lakes in Ontario
Oligotrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Blue 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: 2004-05-14
Monitoring stations: