Is Walla Walla, WA Tap Water Safe to Drink?
Walla Walla tap water meets federal Safe Drinking Water Act standards but 1 of 1 ZIP code 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 Walla Walla Get Its Water?
Water in Walla Walla, WA is provided by 2 public water systems: WALLA WALLA WATER DIVISION and COLLEGE PLACE WATER DEPT.
How Is Walla Walla Tap Water Treated?
Treated water is disinfected using chloramines and free chlorine. Treatment includes groundwater disinfection.
What's in Walla Walla Tap Water?
The following contaminants were detected most frequently in Walla Walla public water systems. 1 of 1 ZIP codes showed detections above EPA health guidelines.
| Contaminant | Peak detected | EPA guideline | ZIPs detected | Status |
|---|---|---|---|---|
| lithium | 14.3 µg/L | 10 µg/L | 1 ZIP | Above guideline |
| PFTrDA | 0.007 µg/L | — | 0 ZIPs | Within guideline |
| 11Cl-PF3OUdS | 0.005 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 |
Health Risk Profile for Walla Walla
Based on EPA monitoring data, 1 of 1 ZIP codes in Walla Walla 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 Walla Walla Tap Water
Is Walla Walla tap water safe to drink?
Walla Walla tap water meets Safe Drinking Water Act requirements but 1 of 1 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 Walla Walla tap water?
The most commonly detected contaminants in Walla Walla water systems include: lithium, PFTrDA, 11Cl-PF3OUdS. See the ZIP-level reports for exact measurements and EPA guideline comparisons.
Where does Walla Walla get its drinking water?
Walla Walla receives water from 2 public water systems, including WALLA WALLA WATER DIVISION.
Do I need a water filter in Walla Walla?
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 Walla Walla tap water tested?
Public water systems in Walla Walla 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 2024-10-16.
Tap water reports by ZIP in Walla Walla
- 99362 - Walla Walla tap water report Higher concern
Water utilities serving Walla Walla, WA
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- WALLA WALLA WATER DIVISIONAction advised
Also covers / overlaps with
- Garrett, WA · CDP
- Milton-Freewater CCD, OR · Township
- Waitsburg CCD, WA · Township
- Walla Walla East, WA · CDP
- Walla Walla-College Place CCD, WA · Township