Water Quality Standard (Level Detected) | Fall 2022 (196 wells)
| Spring 2022 (260 wells) | 2021 (217 wells) | 2020 (295 wells) | 2019 (148 wells) | Wisconsin Average |
Total Coliform (0 MPN/100 ml) | 92% | 90% | 76% | 86% | 84% | 17% (>0 MPN/ 100 ml) |
Total Coliform (1-10 MPN/100 ml) | 6% | 6% | 14% | 9% | 10% |
Total Coliform (10-100 MPN/100 ml) | 2% | 3% | 6% | 3% | 4% |
Total Coliform (>100 MPN/100 ml) | 1% | 1% | 3% | 1% | 1% |
E.coli (0 MPN/100 ml) | 100% | 99% | 98% | 99% | 100% | 5% (>0 MPN/ 100 ml) |
E.coli (1-10 MPN/100 ml) | 0% | <1% | 1% | 1% | 0% |
E.coli (10-100 MPN/100 ml) | 0% | 0% | <1% | 0% | 0% |
E.coli (>100 MPN/100ml) | 0% | 0% | 0% | 0% | 0% |
Nitrate (0 mg/L) | 74% | 80% | 75% | 72% | 71% | 10% (>10 mg/L) |
Nitrate (2-5 mg/L) | 18% | 16% | 11% | 16% | 16% |
Nitrate (5-10 mg/L)(>10 mg/L) | 7% | 4% | 12% | 12% | 11% |
Nitrate (>10 mg/L) | 1% | 0% | 2% | <1% | 2% |
Arsenic (<2 µg/L) | 92% | 88% | 89% | 90% | 99% | 4% (>10 µg/L) |
Arsenic (2-5 µg/L) | 7% | 11% | 9% | 6% | 1% |
Arsenic (5-10 µg/L) | 1% | 1% | 1% | 3% | 0% |
Arsenic (>10 µg/L) | 0% | 0% | 1% | <1% | 0% |