These water systems are facing quality challenges and may need infrastructure improvements, treatment upgrades, or closer monitoring to ensure safe drinking water for residents.
6
Systems above EPA action level
7
Systems with PFAS chemicals
11
Systems with violations
Infrastructure Investment: Minnesota is investing in water infrastructure upgrades to replace aging pipes and improve treatment facilities.
Monitoring & Testing: The EPA and Minnesota Department of Health require regular testing and public reporting of water quality data.
PFAS Remediation: New regulations are being developed to address PFAS contamination, with treatment systems being installed in affected areas.
Lead Reduction: Utilities with elevated lead levels must implement corrosion control measures and replace lead service lines.
Ranked by overall water quality score
| Rank | City & System | Score | Lead (ppb) | Nitrate (ppm) | Issues | Action |
|---|---|---|---|---|---|---|
| #317 | Rochester MN1550003 | F0 | 18.2⚠ | 11.5⚠ | High LeadHigh NitratePFASViolations | View Details → |
| #316 | Mankato MN1070012 | F20 | 15.8⚠ | 11.6⚠ | High LeadHigh NitrateViolations | View Details → |
| #315 | Columbia Heights MN1020016 | F20 | 20.9⚠ | 10.5⚠ | High LeadHigh NitrateViolations | View Details → |
| #314 | Monticello MN1860013 | F30 | 15.1⚠ | 7.8 | High LeadViolations | View Details → |
| #313 | CASS LAKE 055294205 | F30 | 21.5⚠ | 11.8⚠ | High LeadHigh Nitrate | View Details → |
| #312 | Thief River Falls MN1570003 | F35 | 12.2 | 13.6⚠ | High NitrateViolations | View Details → |
| #311 | ST CLOUD MN1730031 | F35 | 10.3 | 9.4 | PFAS | View Details → |
| #310 | Inver Grove Heights MN1190014 | F35 | 12.9 | 13.9⚠ | High NitrateViolations | View Details → |
| #309 | AITKIN MN1010012 | F40 | 18.3⚠ | 4.8 | High LeadViolations | View Details → |
| #308 | Park Rapids MN1290011 | F45 | 5.9 | 6.9 | PFAS | View Details → |
| #307 | Ramsey MN1020035 | F45 | 9.1 | 9.4 | PFAS | View Details → |
| #306 | Owatonna MN1740007 | F45 | 8.8 | 7.3 | PFAS | View Details → |
| #305 | Detroit Lakes MN1030006 | F45 | 11.7 | 6.3 | Violations | View Details → |
| #304 | CASS LAKE 055294204 | F45 | 12.4 | 10.4⚠ | High Nitrate | View Details → |
| #303 | Hutchinson MN1430004 | F45 | 8.8 | 5.7 | PFAS | View Details → |
| #302 | Foley MN1050001 | F45 | 5.1 | 5.5 | PFAS | View Details → |
| #301 | Hastings MN1190031 | F45 | 11.1 | 8.2 | Violations | View Details → |
| #300 | Ely MN1690014 | F45 | 9.0 | 11.8⚠ | High NitrateViolations | View Details → |
| #299 | Fergus Falls MN1560028 | F45 | 9.2 | 13.0⚠ | High NitrateViolations | View Details → |
| #298 | Aitkin MN1010001 | F45 | 10.1 | 12.9⚠ | High Nitrate | View Details → |
Lead typically enters drinking water through corrosion of plumbing materials, especially in older buildings. The EPA action level is 15 ppb. If exceeded, water systems must take action.
Nitrate comes from agricultural runoff, fertilizers, and septic systems. The EPA maximum contaminant level is 10 ppm. High levels can be especially harmful to infants.
PFAS are synthetic chemicals that don't break down in the environment. They've been linked to health issues. New EPA regulations are being developed to limit PFAS in drinking water.
If your water system has issues, consider using certified water filters, requesting testing from your utility, and staying informed through local water quality reports.
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