How Clean Is Palmyra-Modesto Lake?
Palmyra-Modesto Lake 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. Phosphorus: 56 µg/L. Trophic State Index: 62.
Cleanliness Snapshot
| Metric | Palmyra-Modesto Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | C | D |
| Phosphorus | 56 µg/L | <30 = clean |
| Trophic State Index | 62 | <50 = clean |
How does Palmyra-Modesto Lake compare?
Palmyra-Modesto Lake's grade of C matches or beats the Wisconsin state average of D. It ranks #1 of 3 lakes in Macoupin County by water quality score.