CUSTER SCHOOL DIST NO 15
Montana — Non-Transient Non-Community — PWSID: MT0001748
System Information
| PWSID | MT0001748 |
| System Name | CUSTER SCHOOL DIST NO 15 |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | State |
| EPA Region | 08 |
| Serves School | Yes |
| Wholesaler | No |
| First Reported | Mar 5, 1980 |
| Last Reported | Jan 5, 2026 |
Location & Contact
| State | Montana |
| City | CUSTER |
| ZIP Code | 59024 |
| Address | PO BOX 69 |
| Organization | OLSON, LANCE |
| Phone | 406-856-4117 |
Population & Service
| Population Served | 100 |
| Service Connections | 1 |
Drinking Water Violations (85)
This water system has 85 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2024 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Unaddressed | — | Lead and Copper Rule |
| Oct 1, 2024 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Unaddressed | — | Lead and Copper Rule |
| Oct 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 29, 2023 | Lead and Copper Rule |
| Oct 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 29, 2023 | Lead and Copper Rule |
| Oct 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 29, 2023 | Lead and Copper Rule |
| Sep 29, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 11, 2021 | Lead and Copper Rule |
| Sep 29, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 11, 2021 | Lead and Copper Rule |
| Jul 1, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Aug 4, 2020 | Lead and Copper Rule |
| Jul 1, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Aug 4, 2020 | Lead and Copper Rule |
| Jul 1, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Aug 4, 2020 | Lead and Copper Rule |
| Jan 1, 2020 | Aug 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Aug 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Aug 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Aug 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Aug 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Aug 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Aug 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Aug 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Aug 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Aug 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Aug 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Aug 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2019 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 4, 2019 | Lead and Copper Rule |
| Jan 1, 2019 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 4, 2019 | Lead and Copper Rule |
| Jan 1, 2019 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 4, 2019 | Lead and Copper Rule |
| Jan 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 23, 2018 | Lead and Copper Rule |
| Jan 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 23, 2018 | Lead and Copper Rule |
| Jan 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 23, 2018 | Lead and Copper Rule |
| Dec 1, 2017 | Dec 31, 2017 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Dec 31, 2017 | Revised Total Coliform Rule |
| Dec 1, 2017 | Dec 31, 2017 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Dec 31, 2017 | Revised Total Coliform Rule |
| Dec 1, 2017 | Dec 31, 2017 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Dec 31, 2017 | Revised Total Coliform Rule |
| Oct 1, 2017 | Dec 31, 2017 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2017 | Nitrate Rule |
| Oct 1, 2017 | Dec 31, 2017 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2017 | Nitrate Rule |
| Oct 1, 2017 | Dec 31, 2017 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2017 | Nitrate Rule |
| Jul 1, 2016 | Sep 30, 2016 | Nitrate-Nitrite | MCL | Yes | No | 14.4 MG/L | — | 10 | Resolved | Sep 30, 2016 | Nitrate Rule |
| Jul 1, 2016 | Sep 30, 2016 | Nitrate-Nitrite | MCL | Yes | No | 14.4 MG/L | — | 10 | Resolved | Sep 30, 2016 | Nitrate Rule |
| Jul 1, 2016 | Sep 30, 2016 | Nitrate-Nitrite | MCL | Yes | No | 14.4 MG/L | — | 10 | Resolved | Sep 30, 2016 | Nitrate Rule |
| Jul 1, 2016 | Sep 30, 2016 | Nitrate-Nitrite | MCL | Yes | No | 14.4 MG/L | — | 10 | Resolved | Sep 30, 2016 | Nitrate Rule |
| Jul 1, 2016 | Jul 31, 2016 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jul 31, 2016 | Revised Total Coliform Rule |
| Jul 1, 2016 | Jul 31, 2016 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jul 31, 2016 | Revised Total Coliform Rule |
| Jul 1, 2016 | Jul 31, 2016 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jul 31, 2016 | Revised Total Coliform Rule |
| Jul 1, 2016 | Jul 31, 2016 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jul 31, 2016 | Revised Total Coliform Rule |
| Apr 1, 2016 | Jun 30, 2016 | Nitrate-Nitrite | MCL | Yes | No | 18.1 MG/L | — | 10 | Resolved | Jun 30, 2016 | Nitrate Rule |
| Apr 1, 2016 | Jun 30, 2016 | Nitrate-Nitrite | MCL | Yes | No | 18.1 MG/L | — | 10 | Resolved | Jun 30, 2016 | Nitrate Rule |
| Apr 1, 2016 | Jun 30, 2016 | Nitrate-Nitrite | MCL | Yes | No | 18.1 MG/L | — | 10 | Resolved | Jun 30, 2016 | Nitrate Rule |
| Apr 1, 2016 | Jun 30, 2016 | Nitrate-Nitrite | MCL | Yes | No | 18.1 MG/L | — | 10 | Resolved | Jun 30, 2016 | Nitrate Rule |
| Oct 1, 2013 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jul 8, 2014 | Lead and Copper Rule |
| Oct 1, 2013 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jul 8, 2014 | Lead and Copper Rule |
| Oct 1, 2013 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jul 8, 2014 | Lead and Copper Rule |
| Jul 1, 2009 | Jul 31, 2009 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2009 | Total Coliform Rule |
| Jul 1, 2009 | Jul 31, 2009 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2009 | Total Coliform Rule |
| Jul 1, 2009 | Jul 31, 2009 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2009 | Total Coliform Rule |
| Jun 1, 2009 | Jun 30, 2009 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2009 | Total Coliform Rule |
| Jun 1, 2009 | Jun 30, 2009 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2009 | Total Coliform Rule |
| Jun 1, 2009 | Jun 30, 2009 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2009 | Total Coliform Rule |
| Jan 1, 2005 | Dec 31, 2005 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2005 | Nitrate 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.