Lennox and Addington County, Ontario · Water Quality Report Card
Mocassin Lake
Mocassin Lake in Lennox and Addington, Ontario received a water quality grade of A (Excellent). Phosphorus: 8.8 µg/L.
- Type
- Oligotrophic
Mocassin Lake is a cold, clear oligotrophic lake in Lennox and Addington County, Ontario. Water quality is graded A based on 1 sampling years through 2003. Compared to the 17 other monitored lakes in Lennox and Addington County, Mocassin Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2003-05-31. Grade methodology: LakeGrade methodology.
Watch Mocassin 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
No clarity data. Phosphorus level: 8.8 µg/L. Trophic State Index: 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 8.8 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Mocassin Lake
Compare lakeside cabins, hotels, and vacation rentals near Mocassin Lake in Lennox and Addington, 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 Mocassin 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 Mocassin Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Mocassin Lake — straight to your inbox. No spam, unsubscribe anytime.
Fishing Mocassin Lake
Location
County Ranking
Ranked #6 of 18 lakes in Lennox and Addington
Nearby Lakes in Lennox and Addington
Explore Mocassin 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 Mocassin 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: 2003-05-31
Monitoring stations: