Poor Water Quality
Water Quality Summary
Tap water quality in Potrero, California (91963) receives an overall grade of D (Poor) with a score of 49 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 32 points below the California state average of 81. Compared to the national average (75), this area scores significantly lower. The area is served by Twin Lakes Resort, a groundwater system providing water to approximately 400 people. Over the past 5 years, water systems here have accumulated 47 violations, including 39 health-based violations.
A score of 49/100 signals poor water quality in Potrero, CA. 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.
Common Questions
Tap water in Potrero, California receives a grade of D (Poor) with a score of 49/100. 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 91963 is served by 1 water system using groundwater sources, providing water to approximately 400 people. Groundwater is naturally filtered through rock and soil, often requiring less treatment. However, it can be vulnerable to contamination from underground sources like naturally occurring arsenic, nitrates from agriculture, or PFAS from industrial sites.
No lead data is currently available for ZIP code 91963. This may mean lead testing results haven't been reported recently, or the serving water system uses monitoring waivers. You can request a free lead test kit from most water utilities or purchase a certified home testing kit.
No PFAS ("forever chemicals") were detected in water systems serving Potrero, California 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 Potrero, California have received 47 violations in the last 5 years, including 39 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.
Water in Potrero, California shows no major contaminant concerns based on available data. A basic carbon filter can improve taste and reduce chlorine. For extra peace of mind, an NSF-certified pitcher filter or faucet-mount filter provides an affordable layer of protection.
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