WASHINGTON STATE UNIVERSITY
Washington — Community Water System — PWSID: WA5393200
System Information
| PWSID | WA5393200 |
| System Name | WASHINGTON STATE UNIVERSITY |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | State |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Feb 7, 1981 |
| Last Reported | Dec 11, 2025 |
Location & Contact
| State | Washington |
| City | Pullman |
| ZIP Code | 99164-1150 |
| Address | po box 641150 |
| Organization | WASHINGTON STATE UNIVERSITY |
| Phone | — |
Population & Service
| Population Served | 21,506 |
| Service Connections | 4,355 |
Drinking Water Violations (23)
This water system has 23 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2008 | Jun 30, 2008 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Archived | Jun 30, 2008 | Synthetic Organic Chemicals |
| Oct 1, 2007 | Dec 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | Synthetic Organic Chemicals |
| Oct 1, 2007 | Dec 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | Synthetic Organic Chemicals |
| Oct 1, 2007 | Dec 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | Synthetic Organic Chemicals |
| Oct 1, 2007 | Dec 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | Synthetic Organic Chemicals |
| Oct 1, 2007 | Dec 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | Synthetic Organic Chemicals |
| Jul 1, 2007 | Sep 30, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Sep 30, 2007 | Synthetic Organic Chemicals |
| Jul 1, 2007 | Sep 30, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Sep 30, 2007 | Synthetic Organic Chemicals |
| Jul 1, 2007 | Sep 30, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Sep 30, 2007 | Synthetic Organic Chemicals |
| Jul 1, 2007 | Sep 30, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Sep 30, 2007 | Synthetic Organic Chemicals |
| Apr 1, 2007 | Jun 30, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Jun 30, 2007 | Synthetic Organic Chemicals |
| Apr 1, 2007 | Jun 30, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Jun 30, 2007 | Synthetic Organic Chemicals |
| Apr 1, 2007 | Jun 30, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Jun 30, 2007 | Synthetic Organic Chemicals |
| Jan 1, 2007 | Mar 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Mar 31, 2007 | Synthetic Organic Chemicals |
| Jan 1, 2007 | Mar 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Mar 31, 2007 | Synthetic Organic Chemicals |
| May 1, 1992 | May 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | May 31, 1992 | Total Coliform Rule |
| May 1, 1992 | May 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | May 31, 1992 | Total Coliform Rule |
| Apr 1, 1992 | Apr 30, 1992 | Coliform (TCR) | MR | No | Yes | — | 5% of samples | — | Archived | Apr 30, 1992 | Total Coliform Rule |
| Apr 1, 1992 | Apr 30, 1992 | Coliform (TCR) | MR | No | Yes | — | 5% of samples | — | Archived | Apr 30, 1992 | Total Coliform Rule |
| Mar 1, 1992 | Mar 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Mar 31, 1992 | Total Coliform Rule |
| Mar 1, 1992 | Mar 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Mar 31, 1992 | Total Coliform Rule |
| Nov 1, 1991 | Nov 30, 1991 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Nov 30, 1991 | Total Coliform Rule |
| Oct 1, 1979 | Oct 31, 1979 | Gross Alpha, Excl. Radon and U | MR | No | No | — | 15 pCi/L | — | Archived | Oct 31, 1979 | Radionuclides and Revised Rad Rule |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.