How Clean Is Lake Ashtabula?
Lake Ashtabula has fair water quality — typical of lakes with moderate nutrient enrichment. It received a water quality grade of C (Fair) based on EPA monitoring data. Water clarity (Secchi depth): 6.6 ft. Phosphorus: 348 µg/L. Chlorophyll-a (algae): 3.4 µg/L. Trophic State Index: 60.
Cleanliness Snapshot
| Metric | Lake Ashtabula | North Dakota avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 6.6 ft | — |
| Phosphorus | 348 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 3.4 µg/L | <10 = clean |
| Trophic State Index | 60 | <50 = clean |
How does Lake Ashtabula compare?
Lake Ashtabula's grade of C matches or beats the North Dakota state average of C. It ranks #3 of 3 lakes in Barnes County by water quality score.
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