Failing Water Quality
| Contaminant | Detected Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| Lead |
20.4
|
15 ppb | 1 ppb | Exceeded |
| Compound | Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| PFOS | 41.0 ppt | 4 ppt | 4 ppt | Exceeded |
| PFOA | 18.0 ppt | 4 ppt | 4 ppt | Exceeded |
| PFHxS | 8.8 ppt | 10 ppt | 10 ppt | Below limit |
| PFPeA | 8.4 ppt | No standard | — | Unregulated |
| PFHxA | 8.0 ppt | No standard | 400 ppt | Unregulated |
| PFBS | 7.9 ppt | 2000 ppt | 100 ppt | Below limit |
| PFNA | 6.9 ppt | 10 ppt | 10 ppt | Below limit |
| PFBA | 6.1 ppt | No standard | 500 ppt | Unregulated |
Water Quality Summary
Tap water quality in Clovis, California (93619) receives an overall grade of F (Failing) with a score of 16 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 65 points below the California state average of 81. Compared to the national average (75), this area scores significantly lower. The area is served by 2 water systems providing water to approximately 130,165 people, using surface water and groundwater sources. Testing has found elevated levels of Lead that warrant attention. Notably, 2 PFAS compounds exceed EPA limits — a significant concern given the persistent nature of these chemicals. Over the past 5 years, water systems here have accumulated 59 violations, including 41 health-based violations.
A score of 16/100 indicates serious water quality failures in Clovis, CA. The water system has significant violations, contaminant exceedances, or enforcement actions. Residents should strongly consider using a certified water filtration system for drinking and cooking water, requesting their utility's latest test results, and potentially having their water independently tested.
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 Clovis, California receives a grade of F (Failing) with a score of 16/100. 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 93619 is served by 2 water systems using surface water, groundwater sources, providing water to approximately 130,165 people. Multiple source types mean your water may come from a blend of surface and underground sources.
Yes — lead levels in Clovis, California are 20.4 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.
Yes — 10 PFAS compounds were detected in water serving Clovis, California, and 2 exceed EPA maximum contaminant levels. PFAS are persistent chemicals linked to cancer, immune system effects, and developmental issues. A reverse osmosis or activated carbon filter certified for PFAS removal is recommended.
Water systems serving Clovis, California have received 59 violations in the last 5 years, including 41 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, PFAS), residents in Clovis, California 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.