How Clean Is Ash Lake?
Ash Lake has fair water quality — typical of lakes with moderate nutrient enrichment. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 5.5 ft. Phosphorus: 39 µg/L. Chlorophyll-a (algae): 11.1 µg/L. Trophic State Index: 55.
Cleanliness Snapshot
| Metric | Ash Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 5.5 ft | — |
| Phosphorus | 39 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 11.1 µg/L | <10 = clean |
| Trophic State Index | 55 | <50 = clean |
How does Ash Lake compare?
Ash Lake's readings match or beat the Minnesota state average. It ranks #60 of 68 lakes in St. Louis County on nutrient and algae readings.
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