Mara Lake
Shuswap Lake, 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
Mara Lake in Shuswap Lake, 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: 7.5 m visibility. Phosphorus: 4.1 µg/L. Chlorophyll-a (algae): 1.7 µg/L.
- Clarity
- 7.5 m
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Why Mara 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 Mara 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.
Mara Lake is a lake in Shuswap Lake County, British Columbia.
Source: the British Columbia Ministry of Environment and Parks — not the EPA Water Quality Portal, last sampled 2025-08-25. Grade methodology: LakeQuality methodology.
What Mara Lake is good for
From access and monitoring records, not editorial picks.
- Clear water24.6 ft of visibility
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Mara Lake
These are the measurements ENV publishes for Mara Lake. No A–F letter applies here: see why.
Crystal clear, you can see 24.6 ft down. Phosphorus 4.1 µg/L. Chlorophyll-a 1.7 µg/L. TSI 30.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.5 m | Measured, not scored |
| Phosphorus | 4.1 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | 1.7 µg/L | Measured, not scored |
| Trophic State Index (TSI) | 30 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Fishing Mara Lake
Nearby Lakes in Shuswap Lake
Frequently asked questions about Mara Lake
Where is Mara Lake?
- Mara Lake is a lake in Shuswap Lake, 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 Mara Lake?
- Mara Lake in Shuswap Lake, 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: 7.5 m visibility. Phosphorus: 4.1 µg/L. Chlorophyll-a (algae): 1.7 µg/L.
Is Mara Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Mara Lake across LakeQuality
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Oligotrophic Lakes in British Columbia
Where this data comes from
72 measurements from 1 monitoring station, 2017–2025. 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-bc72 samples · 2017–2025
Monitoring station identifiers (1)
0500128
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.