How Clean Is Hall Lake?
Hall Lake is algae-prone, with a higher bloom risk in warm months. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 3 ft. Phosphorus: 96 µg/L. Chlorophyll-a (algae): 57.4 µg/L. Trophic State Index: 67.
Cleanliness Snapshot
| Metric | Hall Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 3 ft | — |
| Phosphorus | 96 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 57.4 µg/L | <10 = clean |
| Trophic State Index | 67 | <50 = clean |
How does Hall Lake compare?
Hall Lake's readings run above the Minnesota state average. It ranks #4 of 12 lakes in Martin County by water quality score. Multi-year monitoring data shows water quality is stable based on 6 years of records.
Watch Hall Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.