County · Washington

Walla Walla County, Washington: drinking water records

Name: Drinking water records for Walla Walla County, Washington
Creator: U.S. Environmental Protection Agency
License: https://www.usa.gov/government-works

Explore EPA records for 33 community water systems across 8 ZIP codes in Walla Walla County, then find water-testing resources and available recent monitoring-station readings.

In focus33Community water systems

Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 3 of the 33 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

systems in EPA's PFAS survey

systems where PFAS was found

systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses

systems that have reached the lead action level

systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 33 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water system	People served	PFAS survey results	Health-based violations	Lead, 9 in 10 homes at or below
Walla Walla Water Division WA5392500	42,959	120	27	4.4 ppbbelow the action level
College Place Water Dept WA5314050	8,147	300	0	2.1 ppbbelow the action level
Snake River Housing Water System WA5300710	3,036	120	0	0 ppbbelow the action level
Great Basin Water Burbank WA5331477	656	0	5	0 ppbbelow the action level
Dixie Water Association WA5319480	240	0	1	0 ppbbelow the action level
Westbourne Acres WA5395047	94	0	3	6.7 ppbbelow the action level
Prospect Heights Comm Water Assn WA5369700	40	0	1	15 ppbat or above the action level
Waitsburg City of WA5392250	1,817	0	0	1.7 ppbbelow the action level
Consolidated Irrigation Dist 14 WA5314650	1,555	0	0	0 ppbbelow the action level
Walla Walla University WA5392470	1,273	0	0	0 ppbbelow the action level
Valle Lindo Homes WA5392475	787	0	0	0 ppbbelow the action level
Veterans Affair Med Ctr Dept of WA5390542	785	0	0	1 ppbbelow the action level
Green Tank Irr District 11 WA5329550	553	0	0	0.6 ppbbelow the action level
Burbank Irrigation District 4 WA5309300	527	0	0	0 ppbbelow the action level
Prescott Town of WA5369250	522	0	0	1.2 ppbbelow the action level
Columbia View Water System WA5314176	500	0	0	1.1 ppbbelow the action level
Arlenes Addition WA5302942	480	0	0	2.2 ppbbelow the action level
Artesian Water District 8 WA5303150	302	0	0	1.5 ppbbelow the action level
Hydro Irrigation District No 9 WA5335275	260	0	0	0 ppbbelow the action level
Blalock Orchard Dist 10 WA5307350	250	0	0	0 ppbbelow the action level
Wallula Water District WA5392600	200	0	0	0 ppbbelow the action level
Blalock Orchards Dist 12 WA5307400	193	0	0	3 ppbbelow the action level
Sun Harbor Water District #3 WA5385129	187	0	0	0.4 ppbbelow the action level
Burbank Heights WA5309350	177	0	0	2.8 ppbbelow the action level
Sydney Heights Water Assn WA5386647	130	0	0	0 ppbbelow the action level
Summers Circle Water LLC WA5307937	82	0	0	0.5 ppbbelow the action level
Firstfruits Farms WA5308690	68	0	0	4 ppbbelow the action level
Cottonwood Glen Water Assn WA5315112	65	0	0	0 ppbbelow the action level
Kooskooskie Cabin Owners INC. WA5334751	45	0	0	0 ppbbelow the action level
Jubilee WA5305219	30	0	0	3 ppbbelow the action level
Kzh Farms - Higgy WA5311445	29	0	0	1 ppbbelow the action level
Mini-Pearl Water System WA5311161	28	0	0	7.5 ppbbelow the action level
Reser Creek Water System WA5304761	26	0	0	0 ppbbelow the action level

Shaded rows report lead at or above the 15 ppb action level in their latest monitoring period. EPA sets that level for the value 9 in 10 sampled homes fall at or below; reaching it requires the utility to act, and it is not a measurement of any single tap. One system in this table is at or above it. What an action level means

USGS · Monitoring stations

The water, more recently.

Available station readings in Walla Walla County, Washington. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-05

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-11

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-09-09

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed 2026-09-15

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in Walla Walla County

8ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

Burbank
College Place
Dixie
Prescott
Touchet
Waitsburg
Walla Walla
Wallula

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

99323Burbank
99324College Place
99329Dixie
99348Prescott
99360Touchet
99361Waitsburg
99362Walla Walla
99363Wallula

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASReading PFAS survey resultsWhat a detection, a reporting level and a yearly average mean in EPA’s PFAS survey records.LeadChoosing a lead filter5 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near Walla Walla County

All Washington counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.