How Clean Is Carlos Lake?
Carlos Lake is among the cleanest lakes in Minnesota. It received a water quality grade of A (Excellent) based on EPA monitoring data. Water clarity (Secchi depth): 18 ft. Phosphorus: 13.5 µg/L. Chlorophyll-a (algae): 2.1 µg/L. Trophic State Index: 38.
Cleanliness Snapshot
| Metric | Carlos Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 18 ft | — |
| Phosphorus | 13.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 2.1 µg/L | <10 = clean |
| Trophic State Index | 38 | <50 = clean |
How does Carlos Lake compare?
Carlos Lake's grade of A matches or beats the Minnesota state average of C. It ranks #18 of 37 lakes in Douglas County by water quality score. Multi-year monitoring data shows water quality is declining based on 6 years of records.
Watch Carlos Lake water quality
Get an email when the grade, clarity, or algae reading changes. Unsubscribe anytime.