How Clean Is Antelope Lake?
Antelope Lake has poor water quality, with elevated phosphorus and algae. It received a water quality grade of D (Poor) based on EPA monitoring data. Water clarity (Secchi depth): 3.5 ft. Chlorophyll-a (algae): 43.6 µg/L. Trophic State Index: 63.
Cleanliness Snapshot
| Metric | Antelope Lake | North Dakota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 3.5 ft | — |
| Chlorophyll-a (Algae) | 43.6 µg/L | <10 = clean |
| Trophic State Index | 63 | <50 = clean |
How does Antelope Lake compare?
Antelope Lake's grade of D falls below the North Dakota state average of C. It ranks #2 of 3 lakes in Pierce County by water quality score. Multi-year monitoring data shows water quality is declining based on 2 years of records.