Fair Water Quality
| Contaminant | Detected Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| Lead |
5.0
|
15 ppb | 1 ppb | Warning |
| Copper |
1530.0
|
1300 ppb | 300 ppb | Exceeded |
Water Quality Summary
Tap water quality in Mankato, Minnesota (56001) receives an overall grade of C (Fair) with a score of 59 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 29 points below the Minnesota state average of 88. Compared to the national average (75), this area scores significantly lower. The area is served by 8 water systems providing water to approximately 43,913 people, using surface water and groundwater sources. Testing has found elevated levels of Lead, Copper that warrant attention. Over the past 5 years, water systems here have accumulated 37 violations, including 3 health-based violations.
A score of 59/100 indicates fair water quality in Mankato, MN. While the water meets minimum federal standards, there are noteworthy concerns — either elevated contaminant levels approaching regulatory limits, a moderate violation history, or both. Residents may want to review specific contaminant data and consider targeted filtration, especially for sensitive groups like children and pregnant women.
Health Information
Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.
Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.
Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.
If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.
Copper can leach into water from copper plumbing, especially in newer homes or when water is acidic.
Short-term exposure above 1,300 ppb can cause gastrointestinal distress. Long-term exposure may cause liver or kidney damage. People with Wilson's disease are especially vulnerable.
Copper pipes, fittings, and faucets are the most common source. Corrosive (low-pH) water accelerates copper leaching.
If copper levels are elevated, flush pipes by running water for 15–30 seconds before use. Reverse osmosis and distillation systems effectively remove copper.
Common Questions
Tap water in Mankato, Minnesota receives a grade of C (Fair) with a score of 59/100. While it generally meets minimum federal standards, there are some areas of concern including violation history or elevated contaminant levels. Sensitive populations (children, pregnant women, elderly) may want to consider additional filtration.
ZIP code 56001 is served by 8 water systems using surface water, groundwater sources, providing water to approximately 43,913 people. Multiple source types mean your water may come from a blend of surface and underground sources.
Lead was detected at 5.0 ppb in Mankato, Minnesota. While this is below the EPA action level of 15 ppb, it exceeds the health guideline of 1 ppb recommended by health organizations. Consider a certified lead filter, especially if you have young children.
No PFAS ("forever chemicals") were detected in water systems serving Mankato, Minnesota during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.
Water systems serving Mankato, Minnesota have received 37 violations in the last 5 years, including 3 health-based violations. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.
Based on detected contaminants (lead, copper), residents in Mankato, Minnesota should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.