Is Yountville, CA Tap Water Safe to Drink?
Yountville, 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 Yountville Get Its Water?
Water in Yountville, CA is provided by 1 public water system: TOWN OF YOUNTVILLE.
How Is Yountville Tap Water Treated?
Treated water is disinfected using calcium hypochlorite. Treatment includes direct filtration.
What's in Yountville Tap Water?
The following contaminants were detected most frequently in Yountville 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 |
| 11Cl-PF3OUdS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| PFBA | 0.005 µg/L | — | 0 ZIPs | Within guideline |
Health Risk Profile for Yountville
Current EPA monitoring data for Yountville 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 Filters for PFAS Water Profile
PFAS compounds are detected in this water supply. A reverse osmosis (RO) system or an activated-carbon filter specifically certified under NSF/ANSI P473 is required for reliable PFAS reduction. Standard pitcher and faucet filters without P473 certification do not remove PFAS.
8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.
NSF-certified dual-layer filtration reduces 70+ contaminants including PFAS, lead, chlorine, microplastics, and bacteria.
See recommendations matched to your exact address: choose your ZIP code below.
Frequently Asked Questions about Yountville Tap Water
Is Yountville tap water safe to drink?
Yountville 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 Yountville tap water?
The most commonly detected contaminants in Yountville water systems include: lithium, PFTrDA, HFPO-DA. See the ZIP-level reports for exact measurements and EPA guideline comparisons.
Where does Yountville get its drinking water?
Yountville receives water from one public water system, including TOWN OF YOUNTVILLE.
Do I need a water filter in Yountville?
Current data does not show guideline exceedances in Yountville. A certified filter can still reduce trace contaminants and improve taste for households that prefer filtered water.
How often is Yountville tap water tested?
Public water systems in Yountville 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 2025-09-17.
Tap water reports by ZIP in Yountville
- 94599 - Yountville tap water report Some concern
Water utilities serving Yountville, 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.
- TOWN OF YOUNTVILLESome concern
Also covers / overlaps with
- Napa CCD, CA · Township
- St. Helena CCD, CA · Township