Chain Lake
Similkameen River, British ColumbiaView mapDirections
No A–F letter for this lake. The letter is scored against EPA reference conditions for a lake’s ecoregion, and those stop at the US border. Here is what has been measured.
- Limited data
Chain Lake in Similkameen River, British Columbia has water-quality measurements published by ENV and no A–F letter. The letter's EPA reference conditions stop at the US border. Water clarity: 2.7 m visibility. Phosphorus: 25.2 µg/L. Chlorophyll-a (algae): 9.1 µg/L.
- Clarity
- 2.7 m
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Why Chain Lake has no A–F letter
The LakeQuality letter is scored against EPA National Lakes Assessment reference conditions for a lake’s ecoregion, and those stop at the US border. There is no reference condition for British Columbia, so the scale cannot be applied to Chain Lake at any level of sampling. Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
This is not a gap in the monitoring record. ENV publishes these measurements directly, and everything below that has been measured is reported on this page as ENV reports it.
Monitoring: the British Columbia Ministry of Environment and Parks. Read the full grading methodology.
Chain Lake is a lake in Similkameen River County, British Columbia.
Source: the British Columbia Ministry of Environment and Parks — not the EPA Water Quality Portal, last sampled 2024-10-01. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Chain Lake
These are the measurements ENV publishes for Chain Lake. No A–F letter applies here: see why.
Moderate clarity, visible to about 8.9 ft. Phosphorus 25.2 µg/L. Chlorophyll-a 9.1 µg/L. TSI 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.72 m | Measured, not scored |
| Phosphorus | 25.2 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | 9.1 µg/L | Measured, not scored |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Chain Lake
Nearby Lakes in Similkameen River
Frequently asked questions about Chain Lake
Where is Chain Lake?
- Chain Lake is a lake in Similkameen River, British Columbia. Its water-quality measurements are published by ENV, and it carries no A–F letter, because no reference condition exists for lakes in this region, so the assessment thresholds behind the A–F scale cannot be applied here.
What is the water quality grade for Chain Lake?
- Chain Lake in Similkameen River, British Columbia has water-quality measurements published by ENV and no A–F letter. The letter's EPA reference conditions stop at the US border. Water clarity: 2.7 m visibility. Phosphorus: 25.2 µg/L. Chlorophyll-a (algae): 9.1 µg/L.
Is Chain Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Chain Lake across LakeQuality
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Where this data comes from
80 measurements from 1 monitoring station, 2022–2024. Retrieved from British Columbia EnMoDS (not the EPA Water Quality Portal) on 2026-09-06.
Collected and reported by
- British Columbia Ministry of Environment and Parks
enmods-bc80 samples · 2022–2024
Monitoring station identifiers (1)
E328252
Canadian lakes are published with the measurements their provincial programme reports, and without a LakeQuality A–F letter. The letter is scored against EPA reference conditions for a lake’s ecoregion, and the EPA does not survey these lakes. See how grades are calculated and data sources.