Swan Lake South Basin is a cold, clear oligotrophic lake in Lake County, Montana. Water quality is graded A based on 1 sampling years through 2012. Compared to the 26 other monitored lakes in Lake County, Swan Lake South Basin ranks #22 for water quality.
Source: EPA Water Quality Portal sampling records, Montana DNR, last sampled 2012-10-10. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
No clarity data. Chlorophyll-a: 1.7 µg/L. Trophic State Index: 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 1.7 µg/L | A |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Swan Lake South Basin
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Fishing Swan Lake South Basin
Location
County Ranking
Ranked #22 of 27 lakes in Lake County
Nearby Lakes in Lake County
Explore Swan Lake South Basin across LakeGrade
More Montana Lake Rankings
Other Grade A Lakes in Montana
Oligotrophic Lakes in Montana
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2012-10-10
Monitoring stations: 1