MAUPIN, CITY OF
Oregon — Community Water System — PWSID: OR4100510
System Information
| PWSID | OR4100510 |
| System Name | MAUPIN, CITY OF |
| 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 | Mar 12, 1979 |
| Last Reported | Dec 23, 2025 |
Location & Contact
| State | Oregon |
| City | MAUPIN |
| ZIP Code | 97037 |
| Address | PO BOX 308 |
| Organization | MAUPIN, CITY OF |
| Phone | 541-395-2698 |
Population & Service
| Population Served | 420 |
| Service Connections | 340 |
Drinking Water Violations (34)
This water system has 34 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, 2025 | Jul 31, 2025 | Groundwater Rule | MR | No | Yes | — | — | — | Archived | Jul 31, 2025 | Ground Water Rule |
| Jul 1, 2025 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 15, 2025 | Consumer Confidence Rule |
| Jun 1, 2025 | Jun 30, 2025 | Groundwater Rule | MR | No | Yes | — | — | — | Archived | Jun 30, 2025 | Ground Water Rule |
| Apr 10, 2025 | — | Public Notice | Other | No | No | — | — | — | Unaddressed | — | Public Notice Rule and Revised PN Rule |
| Dec 1, 2024 | Dec 31, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Dec 31, 2024 | Revised Total Coliform Rule |
| Nov 1, 2024 | Nov 30, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Nov 30, 2024 | Revised Total Coliform Rule |
| Oct 17, 2024 | — | LEAD AND COPPER RULE REVISIONS | TT | Yes | No | — | — | — | Unaddressed | — | Lead and Copper Rule Revisions |
| Oct 1, 2024 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 15, 2025 | Consumer Confidence Rule |
| Aug 1, 2024 | Aug 31, 2024 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Aug 31, 2024 | Ground Water Rule |
| Jul 1, 2024 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 15, 2025 | Consumer Confidence Rule |
| Aug 1, 2023 | Aug 31, 2023 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Aug 31, 2023 | Ground Water Rule |
| May 1, 2023 | May 31, 2023 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | May 31, 2023 | Ground Water Rule |
| May 1, 2023 | May 31, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | May 31, 2023 | Revised Total Coliform Rule |
| Oct 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 10, 2024 | Lead and Copper Rule |
| Apr 1, 2022 | Apr 30, 2022 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Apr 30, 2022 | Ground Water Rule |
| Jan 1, 2021 | Dec 31, 2021 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2021 | Nitrate Rule |
| Dec 1, 2020 | Dec 31, 2020 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Dec 31, 2020 | Ground Water Rule |
| Oct 1, 2020 | Sep 30, 2023 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2020 | Sep 30, 2023 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2018 | Oct 31, 2018 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Oct 31, 2018 | Ground Water Rule |
| Oct 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 12, 2019 | Lead and Copper Rule |
| Aug 1, 2018 | Aug 31, 2018 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Aug 31, 2018 | Ground Water Rule |
| Sep 1, 2017 | Sep 30, 2017 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Sep 30, 2017 | Ground Water Rule |
| Apr 1, 2017 | Apr 30, 2017 | Groundwater Rule | MR | No | Yes | — | — | — | Resolved | Apr 30, 2017 | Ground Water Rule |
| Aug 27, 2016 | — | Public Notice | Other | No | No | — | — | — | Resolved | Mar 22, 2016 | Public Notice Rule and Revised PN Rule |
| Feb 16, 2016 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Mar 22, 2016 | Ground Water Rule |
| Feb 16, 2016 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Mar 22, 2016 | Ground Water Rule |
| Jan 1, 2016 | Jan 31, 2016 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 31, 2016 | Ground Water Rule |
| Jan 1, 2011 | Jan 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jan 31, 2011 | Total Coliform Rule |
| Jan 1, 2011 | Jan 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jan 31, 2011 | Total Coliform Rule |
| Jan 1, 1997 | Dec 31, 1997 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 1997 | Nitrate Rule |
| Sep 1, 1994 | Sep 30, 1994 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 1994 | Total Coliform Rule |
| Jun 1, 1976 | May 31, 1980 | Gross Alpha, Excl. Radon and U | MR | No | No | — | 15 pCi/L | — | Archived | May 31, 1980 | Radionuclides and Revised Rad Rule |
| Jun 1, 1976 | May 31, 1980 | Combined Radium (-226 and -228) | MR | No | No | — | 5 pCi/L | — | Archived | May 31, 1980 | 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.