Astonish Lake
Algoma District, OntarioView mapDirections
Ontario MECP publishes the water-quality measurements for Astonish Lake. Here is what has been measured.
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Astonish Lake in Algoma District, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 5.9 m visibility. Phosphorus: 2.9 µg/L.
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Astonish Lake is a lake in Algoma District County, Ontario.
Source: Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring) — not the EPA Water Quality Portal, last sampled 2019-05-27. Grade methodology: LakeQuality methodology.
What Astonish Lake is good for
From access and monitoring records, not editorial picks.
- Clear water19.4 ft of visibility
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Astonish 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 Astonish Lake
These are the measurements Ontario MECP publishes for Astonish Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 19.4 ft down. Phosphorus 2.9 µg/L. TSI 27.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.9 m | Measured, not scored |
| Phosphorus | 2.9 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 27 | Oligotrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Fishing Astonish Lake
Nearby Lakes in Algoma District
Frequently asked questions about Astonish Lake
Where is Astonish Lake?
- Astonish Lake is a lake in Algoma District, Ontario. Its water-quality measurements are published by Ontario MECP and shown on this page as reported.
What is the water quality of Astonish Lake?
- Astonish Lake in Algoma District, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 5.9 m visibility. Phosphorus: 2.9 µg/L.
Is Astonish 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 Astonish 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.