Public water system · WA5393200
ActiveWashington State University
At a glance
Washington State University (PWSID WA5393200) is an active community water system in Whitman County, Washington. It reports serving 21,506 people through 4,355 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 10 violations for this system; none is health-based, and the most recent began in April 2008.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
21,506
Service connections
4,355
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Washington State University compare with other water systems in Whitman County?
By EPA's size categories, Washington State University is a large system (10,001 to 100,000 people). Whitman County has 33 active public water systems, and Washington State University is the 2nd-largest of them by population served. Its population served is about 10 times the county average of 2,055 people per system, and accounts for 32% of the 67,820 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active community water system reports serving 6,703 people, so Washington State University is about 3.2 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Washington has 2,392 active community water systems, 51% of the state's 4,705 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 4,370 Washington systems (93%) list groundwater as their primary source.
Who owns and regulates Washington State University?
EPA lists Washington State University as owned by a state government. The WA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 3 of the 33 active systems in Whitman County (9.1%) are also owned by a state government.
Does Washington State University have drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in April 2008. The violations listed here began between October 1979 and April 2008. By type: 10 monitoring and reporting. The contaminant or rule involved most often is Diquat (5 of them). EPA lists 6 as archived and 4 as resolved. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Archived |
| 2007-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 2007-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 2007-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 1992-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-04-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-03-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 10 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Washington State University: frequently asked questions
Who runs Washington State University?
Washington State University (PWSID WA5393200) is a community water system owned by a state government. It is regulated by the WA state drinking water program.
How many people does Washington State University serve?
Washington State University reports serving 21,506 people through 4,355 service connections in Whitman County, Washington.
Where does Washington State University get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Washington State University have any drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in April 2008. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Washington State University's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 10 violations for this system; none is health-based, and the most recent began in April 2008. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Washington State University's water quality report?
As a community water system, Washington State University must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Whitman County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pullman Water Department City of | Whitman | 31,315 | Community | Groundwater |
| Colfax Water Department City of | Whitman | 3,507 | Community | Groundwater |
| Palouse Water Dept City of | Whitman | 1,298 | Community | Groundwater |
| Tekoa City of | Whitman | 1,076 | Community | Groundwater |
| Horn School Rest Area | Whitman | 833 | Transient non-community | Groundwater |
| Rosalia Town of | Whitman | 831 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Washington State University, PWSID WA5393200, Washington”, https://aquacensus.com/water-systems/washington/washington-state-university-wa5393200 (data as of October 1, 2026).