Corona, CA Water Quality Report
Is Corona tap water safe? See PFAS and lead contamination levels for Corona, California. Compare to EPA limits and get filter recommendations.
Quick Answers
Is Corona, CA tap water safe to drink? Corona, CA tap water meets most federal EPA limits, but PFAS compounds have been detected at an average of 10.28 ppt across 8 compounds. A certified pitcher filter or reverse osmosis system is recommended for sensitive populations.
What contaminants are in Corona, CA water? Top PFAS compounds detected in Corona water: PFOS (46 ppt), PFOA (42 ppt), PFHpA (14 ppt). See the full table for all monitored contaminants and comparison to EPA limits.
What filter should I use in Corona, CA? For Corona, CA households, reverse osmosis removes 90%+ of PFAS, lead, and arsenic. Pitcher and faucet filters certified to NSF-53 for PFAS (ZeroWater, PUR PLUS) work for smaller households. Skip standard Brita filters for PFAS removal.
Corona, CA Water Quality Summary
EPA testing has detected PFAS "forever chemicals" in Corona, CA drinking water. Recent monitoring found a peak level of 46 ppt across 4 water systems, representing an average of 10.28 ppt across 8 detected compounds. These levels come from individual EPA UCMR 5 water samples (2023-2025). The EPA's 4 ppt limit for PFOA and PFOS is enforced on a running annual average, so a sample above it shows real exposure but is not by itself a violation.
Contamination Level: MODERATE – Moderate contamination – PFAS detected at meaningful levels; filtration recommended.
Top Detected Compounds
- PFOS: 46 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFOA: 42 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFHpA: 14 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFBA: 7.6 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFPeA: 6.7 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
Lead in Corona, CA Water
EPA Lead and Copper Rule testing has recorded 33 lead samples for Corona water systems, with a 90th-percentile high of 0.004 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 Corona, CA
Corona public water systems have 4 health-based EPA Safe Drinking Water Act violations on record, including Nitrate, Lead and Copper Rule Revisions. 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 about 10,000 public water systems – the broadest PFAS survey ever run in the US. Corona, CA serves a population of roughly 169,868.
ZIP Codes Served
What Corona, 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