How Clean Is Lake of the Hills?
Lake of the Hills 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): 5.1 ft. Phosphorus: 53 µg/L. Chlorophyll-a (algae): 16.8 µg/L. Trophic State Index: 58.
Cleanliness Snapshot
| Metric | Lake of the Hills | Iowa avg |
|---|---|---|
| Overall Grade | C | D |
| Water Clarity (Secchi) | 5.1 ft | — |
| Phosphorus | 53 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 16.8 µg/L | <10 = clean |
| Trophic State Index | 58 | <50 = clean |
How does Lake of the Hills compare?
Lake of the Hills's grade of C matches or beats the Iowa state average of D. It ranks #4 of 5 lakes in Scott County by water quality score. Multi-year monitoring data shows water quality is improving based on 4 years of records.
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