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 | Dec 11, 2025 |
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 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 4, 2023 | Consumer Confidence Rule |
| Jan 1, 2020 | Dec 31, 2020 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2020 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Dec 31, 2020 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2020 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2011 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Nov 3, 2011 | Consumer Confidence Rule |
| Apr 1, 2005 | Apr 30, 2005 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Apr 30, 2005 | Total Coliform Rule |
| Jan 1, 2005 | Dec 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | Synthetic Organic Chemicals |
| Jan 1, 2005 | Dec 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | Synthetic Organic Chemicals |
| Jan 1, 2005 | Dec 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | Synthetic Organic Chemicals |
| Jan 1, 2005 | Dec 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | Synthetic Organic Chemicals |
| Jan 1, 2005 | Dec 31, 2007 | Diquat | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | Synthetic Organic Chemicals |
| Oct 1, 1993 | Oct 31, 1993 | Coliform (TCR) | MR | No | Yes | — | 5% of samples | — | Archived | Oct 31, 1993 | Total Coliform Rule |
| Jan 1, 1992 | Jan 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jan 31, 1992 | Total Coliform Rule |
| Dec 1, 1991 | Dec 31, 1991 | Coliform (TCR) | MR | No | Yes | — | 5% of samples | — | Archived | Dec 31, 1991 | Total Coliform 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.