Stockton, CA Water Quality Report
Is Stockton tap water safe? See PFAS and lead contamination levels for Stockton, California. Compare to EPA limits and get filter recommendations.
Quick Answers
Is Stockton, CA tap water safe to drink? Stockton, CA tap water meets most federal EPA limits, but PFAS compounds have been detected at an average of 0.01 ppt across 6 compounds. A certified pitcher filter or reverse osmosis system is recommended for sensitive populations.
What contaminants are in Stockton, CA water? Top PFAS compounds detected in Stockton water: PFOS (0.01 ppt), PFBS (0.01 ppt), PFOA (0.01 ppt). See the full table for all monitored contaminants and comparison to EPA limits.
What filter should I use in Stockton, CA? For Stockton, CA households, reverse osmosis removes 90%+ of PFAS, lead, and arsenic. NSF-53 certified pitcher and faucet filters (ZeroWater, Clearly Filtered, LifeStraw) work for smaller households. Skip standard Brita filters for PFAS removal.
Stockton, CA Water Quality Summary
EPA testing has detected PFAS "forever chemicals" in Stockton, CA drinking water. Recent monitoring found a peak level of 0.01 ppt across 3 water systems, representing an average of 0.01 ppt across 6 detected compounds.
Contamination Level: LOW – Low contamination – PFAS detected but at lower levels; monitoring continues.
Top Detected Compounds
- PFOS: 0.01 ppt
- PFBS: 0.01 ppt
- PFOA: 0.01 ppt
- PFPeA: 0 ppt
- PFHxS: 0 ppt
Lead in Stockton, CA Water
EPA Lead and Copper Rule testing has recorded 123 lead samples for Stockton water systems, with a 90th-percentile high of 0.0137 mg/L (within the EPA 0.015 mg/L action level). There is no safe level of lead for children; if your home was built before 1986, a certified NSF/ANSI 53 lead-removal filter is recommended.
EPA Violations in Stockton, CA
Stockton public water systems have 22 health-based EPA Safe Drinking Water Act violations on record, including Gross Alpha (excl. radon & uranium), Lead & Copper Rule, Nitrite, Chloroform, Haloacetic Acids (HAA5). Health-based violations mean a contaminant exceeded its federal limit or required treatment was not applied.
About the Data
Source: EPA UCMR5 (Unregulated Contaminant Monitoring Rule 5), the 2023-2025 national testing program spanning 66,000+ public water systems – the broadest drinking water survey ever run in the US. Stockton, CA serves a population of roughly 320,804.
ZIP Codes Served
What Stockton, California Residents Should Do
- Enter your exact ZIP code at knowyourexposure.com for address-level data
- Request the latest Consumer Confidence Report (CCR) from your California utility – it is free and updated annually
- Choose a filter certified for PFAS: NSF/ANSI 58 reverse osmosis (94-99% removal) or an NSF-53 pitcher
- High-exposure households (pregnancy, infants, immunocompromised) should also consider a PFAS home test kit