Is Clayton, CA Tap Water Safe to Drink?
Clayton, CA tap water currently meets EPA health guidelines across all monitored ZIP codes in this dataset. Contaminants including lithium have been detected at or below guideline thresholds.
Where Does Clayton Get Its Water?
Water in Clayton, CA is provided by 1 public water system: CONTRA COSTA WATER DISTRICT.
How Is Clayton Tap Water Treated?
Treated water is disinfected using free chlorine and calcium hypochlorite and chloramines and ozone. Treatment includes conventional treatment (coagulation, flocculation, and filtration) and post-ozone biofiltration.
What's in Clayton Tap Water?
The following contaminants were detected most frequently in Clayton public water systems. All detected levels fall at or below EPA health guidelines in this dataset.
| Contaminant | Peak detected | EPA guideline | ZIPs detected | Status |
|---|---|---|---|---|
| lithium | 9 µg/L | — | 0 ZIPs | Within guideline |
| PFTrDA | 0.007 µg/L | — | 0 ZIPs | Within guideline |
| HFPO-DA | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| PFBA | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| 6:2 FTS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
Health Risk Profile for Clayton
Current EPA monitoring data for Clayton shows contaminant levels within guideline thresholds across all ZIP codes in this dataset. As with all public water systems, sensitive populations may choose to use a certified filter for additional peace of mind.
Best Broad-Spectrum Filters for This Water Profile
This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.
8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.
See recommendations matched to your exact address: choose your ZIP code below.
Frequently Asked Questions about Clayton Tap Water
Is Clayton tap water safe to drink?
Clayton tap water currently meets EPA health guidelines across all monitored ZIP codes in this dataset. Sensitive populations may still choose to use a certified filter as a precaution.
What contaminants are in Clayton tap water?
The most commonly detected contaminants in Clayton water systems include: lithium, PFTrDA, HFPO-DA. See the ZIP-level reports for exact measurements and EPA guideline comparisons.
Where does Clayton get its drinking water?
Clayton receives water from one public water system, including CONTRA COSTA WATER DISTRICT.
Do I need a water filter in Clayton?
Current data does not show guideline exceedances in Clayton. A certified filter can still reduce trace contaminants and improve taste for households that prefer filtered water.
How often is Clayton tap water tested?
Public water systems in Clayton are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2023-12-13.
Tap water reports by ZIP in Clayton
- 94517 - Clayton tap water report Some concern
Water utilities serving Clayton, CA
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- CONTRA COSTA WATER DISTRICTLooks OK
Also covers / overlaps with
- Central Contra Costa CCD, CA · Township
- Tassajara CCD, CA · Township