KITTITAS COUNTY WATER DISTRICT #4
Washington — Community Water System — PWSID: WA5342447
System Information
| PWSID | WA5342447 |
| System Name | KITTITAS COUNTY WATER DISTRICT #4 |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Dec 7, 1987 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Washington |
| City | Thorp |
| ZIP Code | 98946 |
| Address | PO Box 86 |
| Organization | KITTITAS COUNTY WATER DISTRICT #4 |
| Phone | — |
Population & Service
| Population Served | 510 |
| Service Connections | 116 |
Drinking Water Violations (13)
This water system has 13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2023 | — | Other | No | No | — | — | — | Resolved | Oct 4, 2023 | — | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Jan 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2020 | — | |
| Jul 1, 2011 | — | Other | No | No | — | — | — | Resolved | Nov 3, 2011 | — | |
| Apr 1, 2005 | Apr 30, 2005 | MR | No | No | — | 5% of samples | — | Archived | Apr 30, 2005 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | — | |
| Oct 1, 1993 | Oct 31, 1993 | MR | No | Yes | — | 5% of samples | — | Archived | Oct 31, 1993 | — | |
| Jan 1, 1992 | Jan 31, 1992 | MR | No | No | — | 5% of samples | — | Archived | Jan 31, 1992 | — | |
| Dec 1, 1991 | Dec 31, 1991 | MR | No | Yes | — | 5% of samples | — | Archived | Dec 31, 1991 | — |
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.