Poor Water Quality
| Contaminant | Detected Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| Lead |
42.6
|
15 ppb | 1 ppb | Exceeded |
| Compound | Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| PFBA | 5.1 ppt | No standard | 500 ppt | Unregulated |
Water Quality Summary
Tap water quality in Saint Louis, Missouri (63125) receives an overall grade of D (Poor) with a score of 46 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 34 points below the Missouri state average of 80. Compared to the national average (75), this area scores significantly lower. The area is served by 4 water systems providing water to approximately 1,415,799 people, using surface water and groundwater sources. Testing has found elevated levels of Lead that warrant attention. PFAS testing detected 1 compound, all currently below EPA limits. The area has 50 violations over the past 5 years, though none were classified as health-based.
A score of 46/100 signals poor water quality in Saint Louis, MO. Significant issues have been identified, which may include multiple violations, contaminant levels near or above regulatory limits, or PFAS contamination. We recommend reviewing the detailed contaminant data below, considering a certified water filter, and checking your utility's Consumer Confidence Report for the latest information.
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.
Common Questions
Tap water in Saint Louis, Missouri receives a grade of D (Poor) with a score of 46/100. This indicates significant water quality concerns based on violation history, contaminant levels, or enforcement actions. We recommend reviewing the specific contaminants detected below and considering a certified water filter.
ZIP code 63125 is served by 4 water systems using surface water, groundwater sources, providing water to approximately 1,415,799 people. Multiple source types mean your water may come from a blend of surface and underground sources.
Yes — lead levels in Saint Louis, Missouri are 42.6 ppb, which exceeds the EPA action level of 15 ppb. This is a serious concern. We strongly recommend using a certified lead-removal filter for all drinking and cooking water, and having your water independently tested.
1 PFAS compound were detected in water serving Saint Louis, Missouri, but all are currently below EPA limits. While levels are within regulatory standards, some health organizations recommend minimizing any PFAS exposure. Activated carbon or reverse osmosis filters can reduce PFAS levels.
Water systems serving Saint Louis, Missouri have received 50 violations in the last 5 years. 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, PFAS), residents in Saint Louis, Missouri should consider: Reverse osmosis (RO) system — most effective for PFAS, lead, and other contaminants. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.
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