John Lake
Hastings, OntarioView mapDirections
Ontario MECP publishes the water-quality measurements for John Lake. Here is what has been measured.
- 28 ft max depth
- Limited data
John Lake in Hastings, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Phosphorus: 10.5 µg/L.
Stays via Stay22
Stays near John Lake
Compare lakeside cabins, hotels, and vacation rentals near John Lake in Hastings, 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 John Lake
Prices for Sep 18–20, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow John Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
John Lake is a lake in Hastings County, Ontario with an estimated average depth of about 28 feet.
Source: Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring) — not the EPA Water Quality Portal, last sampled 2024-05-16. Grade methodology: LakeQuality methodology.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether John Lake is safe to swim in today is a call for the Ontario Ministry of the Environment, Conservation and Parks and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for John Lake
These are the measurements Ontario MECP publishes for John Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 10.5 µg/L. TSI 38.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 10.5 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 38 | Oligotrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~8.5 m est. |
| Average Depth | ~4.3 m est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Ontario has not published bathymetry for John Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing John Lake
Nearby Lakes in Hastings
Frequently asked questions about John Lake
Ask about John Lake
Answers come straight from the public measurements and survey records on this page.
Where is John Lake?
- John Lake is a lake in Hastings, Ontario. Its water-quality measurements are published by Ontario MECP and shown on this page as reported.
What is the water quality of John Lake?
- John Lake in Hastings, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Phosphorus: 10.5 µg/L.
Is John Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is John Lake?
- No published bathymetric survey covers John Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 28 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore John Lake across LakeQuality
More lakes in Ontario
Other Lakes in Ontario
Oligotrophic Lakes in Ontario
Where this data comes from
Measurements for John Lake come from Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring), not the EPA Water Quality Portal. Per-sample source details are not recorded for this lake. Contains information licensed under the Open Government Licence – Ontario. See data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)