Walla Walla Water Division

ZipCheckup's reading of EPA SDWIS for Walla Walla Water Division (WA5392500): 18 EPA violations in the last five years. Since the flagged events, Walla Walla Water Division resolved all 18 violations - compliant today, 42,959 residents served.

Data: EPA SDWIS

System Overview

Walla Walla Water Division (EPA ID: WA5392500) is a community water system in Washington that serves approximately 42,959 people from surface water sources.

This system serves ZIP code 99362 in Walla Walla.

ZIP-Area Home Safety Context: C (67/100)

This is the average Home Safety Score for 1 of 1 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.

Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.

Violation History

Status breakdown for accepted records with record years 2021-2026: 18 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.

Recent Violations

Contaminants Detected

The following contaminants have been flagged in EPA records for this water system:

Lead & Copper

EPA Lead and Copper Rule evidence attributed directly to this water system:

No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.

Radon Risk in Service Area

Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)

The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.

ZIP Codes Served

Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by WA or modeled from parcel and building-footprint data.

• 99362 - Walla Walla

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Walla Walla Water Division (WA5392500) on EPA.gov.

Frequently Asked Questions

Is Walla Walla Water Division water safe to drink?

The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Walla Walla Water Division; its 18 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.

How many people does Walla Walla Water Division serve?

Walla Walla Water Division serves approximately 42,959 people across 1 ZIP code in Washington.

Where does Walla Walla Water Division get its water?

The primary water source is surface water.

@misc{zipcheckup-water-system-wa5392500,
  author = {{ZipCheckup}},
  title  = {{Walla Walla Water Division (WA): 18 EPA Violations}},
  year   = {n.d.},
  url    = {https://zipcheckup.com/water-system/wa5392500/}
}