Is West Covina, CA Tap Water Safe to Drink?
West Covina tap water meets federal Safe Drinking Water Act standards but 3 of 3 ZIP codes show detections above EPA health guidelines, primarily for lithium. A certified filter is recommended for households that want an additional layer of protection.
Where Does West Covina Get Its Water?
Water in West Covina, CA is provided by 6 public water systems: AZUSA LIGHT AND WATER, COVINA-CITY, WATER DEPT., ROWLAND WATER DISTRICT, SAN GABRIEL VALLEY WATER CO.-EL MONTE, SUBURBAN WATER SYSTEMS-SAN JOSE and VALENCIA HEIGHTS WATER CO..
How Is West Covina Tap Water Treated?
Treated water is disinfected using free chlorine and calcium hypochlorite and chloramines and ozone and on-site generated disinfectant. Treatment includes air stripping, conventional treatment (coagulation, flocculation, and filtration), granular activated carbon filtration, groundwater disinfection, ion exchange, membrane filtration and post-ozone biofiltration.
What's in West Covina Tap Water?
The following contaminants were detected most frequently in West Covina public water systems. 3 of 3 ZIP codes showed detections above EPA health guidelines.
| Contaminant | Peak detected | EPA guideline | ZIPs detected | Status |
|---|---|---|---|---|
| lithium | 54 µg/L | 10 µg/L | 3 ZIPs | Above guideline |
| PFTrDA | 0.007 µg/L | — | 0 ZIPs | Within guideline |
| HFPO-DA | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| 8:2 FTS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| 6:2 FTS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
Health Risk Profile for West Covina
Based on EPA monitoring data, 3 of 3 ZIP codes in West Covina have recorded detections above EPA health guidelines. Sensitive populations such as infants, pregnant individuals, and those with weakened immune systems may benefit from an additional layer of protection such as a certified point-of-use filter.
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 West Covina Tap Water
Is West Covina tap water safe to drink?
West Covina tap water meets Safe Drinking Water Act requirements but 3 of 3 ZIP codes show contaminant levels above EPA health-based guidelines. A certified point-of-use filter adds an extra layer of protection.
What contaminants are in West Covina tap water?
The most commonly detected contaminants in West Covina water systems include: lithium, PFTrDA, HFPO-DA. See the ZIP-level reports for exact measurements and EPA guideline comparisons.
Where does West Covina get its drinking water?
West Covina receives water from 6 public water systems, including AZUSA LIGHT AND WATER.
Do I need a water filter in West Covina?
If your ZIP code is among those with detections above EPA health guidelines, choose a filter certified for the specific contaminants shown in your ZIP report. Reverse osmosis is generally the broadest option for PFAS, lithium, and many other dissolved contaminants.
How often is West Covina tap water tested?
Public water systems in West Covina 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 2025-04-10.
Tap water reports by ZIP in West Covina
- 91790 - East San Gabriel Valley CCD, West Covina tap water report Higher concern
- 91791 - East San Gabriel Valley CCD, West Covina tap water report Higher concern
- 91792 - Woodside Village, West Covina tap water report Higher concern
Water utilities serving West Covina, 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.
- SUBURBAN WATER SYSTEMS-SAN JOSEAction advised
- THREE VALLEYS MWDNo recent federal sampling
Also covers / overlaps with
- East San Gabriel Valley CCD, CA · Township