SULWHANON
Washington — Community Water System — PWSID: 105300141
System Information
| PWSID | 105300141 |
| System Name | SULWHANON |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Nov 3, 2006 |
| Last Reported | Dec 30, 2025 |
Location & Contact
| State | Washington |
| City | DEMING |
| ZIP Code | 98244 |
| Address | P. O. BOX 157 |
| Organization | LEWIS, RYAN |
| Phone | 360-592-0162 |
Population & Service
| Population Served | 150 |
| Service Connections | 27 |
Drinking Water Violations (190)
This water system has 190 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2024 | Mar 31, 2024 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2024 | Nitrate Rule |
| Jan 1, 2024 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 14, 2024 | Lead and Copper Rule |
| Jan 1, 2024 | Mar 31, 2024 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2024 | Nitrate Rule |
| Oct 1, 2023 | Dec 31, 2023 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2023 | Nitrate Rule |
| Aug 16, 2023 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Aug 15, 2024 | Ground Water Rule |
| Jul 1, 2023 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 14, 2024 | Lead and Copper Rule |
| Jul 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 29, 2023 | Consumer Confidence Rule |
| Jul 1, 2023 | Sep 30, 2023 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Sep 30, 2023 | Nitrate Rule |
| Jul 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 29, 2023 | Consumer Confidence Rule |
| Jan 1, 2023 | Mar 31, 2023 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2023 | Nitrate Rule |
| Jan 1, 2023 | Dec 31, 2023 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2023 | Dec 31, 2023 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2023 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 14, 2024 | Lead and Copper Rule |
| Jan 1, 2023 | Dec 31, 2023 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2022 | Dec 31, 2022 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2022 | Nitrate Rule |
| Jul 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 14, 2024 | Lead and Copper Rule |
| Jul 1, 2022 | Sep 30, 2022 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Sep 30, 2022 | Nitrate Rule |
| Jan 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 14, 2024 | Lead and Copper Rule |
| Jan 1, 2022 | Mar 31, 2022 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2022 | Nitrate Rule |
| Oct 1, 2021 | Dec 31, 2021 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2021 | Nitrate Rule |
| Jul 1, 2021 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 4, 2022 | Consumer Confidence Rule |
| Jan 31, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jul 11, 2024 | Lead and Copper Rule |
| Jan 31, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jul 11, 2024 | Lead and Copper Rule |
| Apr 2, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jul 11, 2024 | Lead and Copper Rule |
| Jan 1, 2020 | Dec 31, 2022 | Asbestos | MR | No | Yes | — | 7 MFL | — | Resolved | Dec 31, 2022 | Inorganic Chemicals |
| Jan 1, 2020 | Dec 31, 2020 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2020 | Nitrate Rule |
| Dec 13, 2019 | — | Revised Total Coliform Rule | TT | Yes | No | — | — | — | Resolved | Feb 25, 2020 | Revised Total Coliform Rule |
| Nov 20, 2019 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Dec 17, 2019 | Ground Water Rule |
| Oct 1, 2019 | Dec 31, 2019 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2019 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2019 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Jun 14, 2021 | Lead and Copper Rule |
| Jul 1, 2019 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 31, 2019 | Consumer Confidence Rule |
| Jun 1, 2019 | Jun 30, 2019 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jun 30, 2019 | Revised Total Coliform Rule |
| May 1, 2019 | May 31, 2019 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | May 31, 2019 | Revised Total Coliform Rule |
| Apr 3, 2019 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 5, 2018 | Lead and Copper Rule |
| Mar 2, 2019 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 18, 2022 | Lead and Copper Rule |
| Jan 1, 2019 | Aug 31, 2021 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Aug 31, 2021 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2019 | Aug 31, 2021 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Aug 31, 2021 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2019 | Aug 31, 2021 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Aug 31, 2021 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2019 | Aug 31, 2021 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Aug 31, 2021 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2019 | Jan 31, 2019 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jan 31, 2019 | Revised Total Coliform Rule |
| Oct 1, 2018 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 31, 2019 | Consumer Confidence Rule |
| Oct 1, 2018 | Oct 31, 2018 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Oct 31, 2018 | Revised Total Coliform Rule |
| Jul 1, 2018 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 1, 2018 | Consumer Confidence Rule |
| Jul 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 10, 2018 | Lead and Copper Rule |
| Apr 1, 2018 | Jun 30, 2018 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 2018 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Feb 1, 2018 | Feb 28, 2018 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Feb 28, 2018 | Revised Total Coliform Rule |
| Jan 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 10, 2018 | Lead and Copper Rule |
| Jan 1, 2018 | Mar 31, 2018 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Mar 31, 2018 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2017 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Aug 23, 2017 | Lead and Copper Rule |
| Apr 1, 2017 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | May 10, 2017 | Lead and Copper 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.