TAMOSHAN
Washington — Community Water System — PWSID: WA5387140
System Information
| PWSID | WA5387140 |
| System Name | TAMOSHAN |
| 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 | Feb 7, 1981 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Washington |
| City | Olympia |
| ZIP Code | 98512 |
| Address | 9605 Tilley Rd. South |
| Organization | TAMOSHAN |
| Phone | — |
Population & Service
| Population Served | 260 |
| Service Connections | 94 |
Drinking Water Violations (42)
This water system has 42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jun 1, 2025 | Jun 30, 2025 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2025 | — | |
| Apr 1, 2023 | Jun 30, 2023 | MCL | Yes | No | 61 UG/L | 0.060 mg/L | — | Resolved | Jun 30, 2023 | — | |
| Apr 1, 2023 | Jun 30, 2023 | MCL | Yes | No | 61 UG/L | 0.060 mg/L | — | Resolved | Jun 30, 2023 | — | |
| Jan 1, 2023 | Mar 31, 2023 | MCL | Yes | No | 76.1 UG/L | 0.060 mg/L | — | Resolved | Mar 31, 2023 | — | |
| Jan 1, 2023 | Mar 31, 2023 | MCL | Yes | No | 76.1 UG/L | 0.060 mg/L | — | Resolved | Mar 31, 2023 | — | |
| Oct 1, 2022 | Dec 31, 2022 | MCL | Yes | No | 95.4 UG/L | 0.060 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Oct 1, 2022 | Dec 31, 2022 | MCL | Yes | No | 95.4 UG/L | 0.060 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Jul 1, 2022 | Sep 30, 2022 | MCL | Yes | No | 102.8 UG/L | 0.060 mg/L | — | Resolved | Sep 30, 2022 | — | |
| Jul 1, 2022 | Sep 30, 2022 | MCL | Yes | No | 102.8 UG/L | 0.060 mg/L | — | Resolved | Sep 30, 2022 | — | |
| Apr 1, 2022 | Jun 30, 2022 | MCL | Yes | No | 107.1 UG/L | 0.060 mg/L | — | Resolved | Jun 30, 2022 | — | |
| Apr 1, 2022 | Jun 30, 2022 | MCL | Yes | No | 107.1 UG/L | 0.060 mg/L | — | Resolved | Jun 30, 2022 | — | |
| Jan 1, 2022 | Mar 31, 2022 | MCL | Yes | No | 113.7 UG/L | 0.060 mg/L | — | Resolved | Mar 31, 2022 | — | |
| Jan 1, 2022 | Mar 31, 2022 | MCL | Yes | No | 113.7 UG/L | 0.060 mg/L | — | Resolved | Mar 31, 2022 | — | |
| Dec 1, 2021 | Dec 31, 2021 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2021 | — | |
| Nov 1, 2021 | Nov 30, 2021 | MON | No | Yes | — | — | — | Resolved | Nov 30, 2021 | — | |
| Oct 1, 2021 | Dec 31, 2021 | MCL | Yes | No | 102.8 UG/L | 0.060 mg/L | — | Resolved | Dec 31, 2021 | — | |
| Oct 1, 2021 | Dec 31, 2021 | MCL | Yes | No | 102.8 UG/L | 0.060 mg/L | — | Resolved | Dec 31, 2021 | — | |
| Jul 1, 2021 | Sep 30, 2021 | MCL | Yes | No | 100.8 UG/L | 0.060 mg/L | — | Resolved | Sep 30, 2021 | — | |
| Jul 1, 2021 | Sep 30, 2021 | MCL | Yes | No | 100.8 UG/L | 0.060 mg/L | — | Resolved | Sep 30, 2021 | — | |
| Oct 1, 2018 | Dec 31, 2018 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2018 | — | |
| Oct 1, 2018 | Dec 31, 2018 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2018 | — | |
| Apr 1, 2017 | Jun 30, 2017 | MCL | Yes | No | 96.2 UG/L | 0.080 mg/L | — | Resolved | Jun 30, 2017 | — | |
| Apr 1, 2017 | Jun 30, 2017 | MCL | Yes | No | 96.2 UG/L | 0.080 mg/L | — | Resolved | Jun 30, 2017 | — | |
| Apr 1, 2017 | Jun 30, 2017 | MCL | Yes | No | 96.2 UG/L | 0.080 mg/L | — | Resolved | Jun 30, 2017 | — | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | 99.4 UG/L | 0.080 mg/L | — | Resolved | Mar 31, 2017 | — | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | 99.4 UG/L | 0.080 mg/L | — | Resolved | Mar 31, 2017 | — | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | 99.4 UG/L | 0.080 mg/L | — | Resolved | Mar 31, 2017 | — | |
| Jul 1, 2016 | — | Other | No | No | — | — | — | Resolved | Sep 29, 2016 | — | |
| Jul 1, 2015 | — | Other | No | No | — | — | — | Resolved | Aug 28, 2015 | — | |
| Jan 1, 2000 | — | MR | No | No | — | TT | — | Resolved | Jun 30, 2002 | — | |
| Jun 1, 1999 | Jun 30, 1999 | MR | No | Yes | — | 5% of samples | — | Archived | Jun 30, 1999 | — | |
| Jul 1, 1996 | Jan 1, 1998 | MR | No | No | — | TT | — | Resolved | Jan 1, 1998 | — | |
| Sep 1, 1993 | Sep 30, 1993 | MR | No | Yes | — | 5% of samples | — | Archived | Sep 30, 1993 | — | |
| Dec 1, 1992 | Dec 31, 1992 | MR | No | Yes | — | 5% of samples | — | Archived | Dec 31, 1992 | — | |
| Nov 1, 1992 | Nov 30, 1992 | MR | No | Yes | — | 5% of samples | — | Archived | Nov 30, 1992 | — | |
| Oct 1, 1992 | Oct 31, 1992 | MR | No | Yes | — | 5% of samples | — | Archived | Oct 31, 1992 | — | |
| Dec 1, 1982 | Sep 30, 1983 | MCL | Yes | No | .02 | 0.005 mg/L | .01 | Archived | Sep 30, 1983 | — | |
| Oct 1, 1979 | Oct 31, 1979 | MR | No | No | — | 15 pCi/L | — | Archived | Oct 31, 1979 | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — |
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.