Four Wells Lake
Region of Waterloo, OntarioView mapDirections
Ontario MECP publishes the water-quality measurements for Four Wells Lake. Here is what has been measured.
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Four Wells Lake in Region of Waterloo, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 1 m visibility. Phosphorus: 24 µg/L.
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Four Wells Lake is a lake in Region of Waterloo County, Ontario.
Source: Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring) — not the EPA Water Quality Portal, last sampled 2025-10-10. Grade methodology: LakeQuality methodology.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Four Wells 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 Four Wells Lake
These are the measurements Ontario MECP publishes for Four Wells Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 3.3 ft of visibility. Phosphorus 24 µg/L. TSI 55.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 1 m | Measured, not scored |
| Phosphorus | 24 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Four Wells Lake
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Frequently asked questions about Four Wells Lake
Where is Four Wells Lake?
- Four Wells Lake is a lake in Region of Waterloo, Ontario. Its water-quality measurements are published by Ontario MECP and shown on this page as reported.
What is the water quality of Four Wells Lake?
- Four Wells Lake in Region of Waterloo, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 1 m visibility. Phosphorus: 24 µg/L.
Is Four Wells Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Four Wells 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.