CENTENNIAL WATER AND SEWER DISTRICT
Wyoming — Community Water System — PWSID: WY5601232
System Information
| PWSID | WY5601232 |
| System Name | CENTENNIAL WATER AND SEWER DISTRICT |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 19, 1993 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | Wyoming |
| City | CENTENNIAL |
| ZIP Code | 82055 |
| Address | PO Box 185 |
| Organization | LIBOLT, TANA |
| Phone | 307-742-5756 |
Population & Service
| Population Served | 150 |
| Service Connections | 100 |
Drinking Water Violations (68)
This water system has 68 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, 2023 | Mar 31, 2023 | Chlorine | MR | No | No | — | 4.0 mg/L | — | Resolved | Mar 31, 2023 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 22, 2024 | Lead and Copper Rule |
| Oct 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 22, 2024 | Lead and Copper Rule |
| Jul 1, 2022 | Jul 31, 2022 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jul 31, 2022 | Revised Total Coliform Rule |
| Jan 1, 2018 | Dec 31, 2018 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2018 | Nitrate Rule |
| Jul 1, 2017 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 12, 2017 | Consumer Confidence Rule |
| Jul 1, 2017 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 12, 2017 | Consumer Confidence Rule |
| Nov 16, 2015 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 28, 2018 | Ground Water Rule |
| Nov 16, 2015 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 28, 2018 | Ground Water Rule |
| Nov 16, 2015 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 28, 2018 | Ground Water Rule |
| Nov 16, 2015 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 28, 2018 | Ground Water Rule |
| Oct 1, 2013 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 28, 2018 | Ground Water Rule |
| Oct 1, 2013 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 28, 2018 | Ground Water Rule |
| Oct 1, 2013 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 28, 2018 | Ground Water Rule |
| Oct 1, 2013 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Sep 28, 2018 | Ground Water Rule |
| Jun 1, 2013 | Jun 30, 2013 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2013 | Total Coliform Rule |
| Jun 1, 2013 | Jun 30, 2013 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2013 | Total Coliform Rule |
| Dec 1, 2012 | Dec 31, 2012 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Dec 31, 2012 | Total Coliform Rule |
| Dec 1, 2012 | Dec 31, 2012 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Dec 31, 2012 | Total Coliform Rule |
| Oct 1, 2010 | Oct 31, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2010 | Total Coliform Rule |
| Oct 1, 2010 | Oct 31, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2010 | Total Coliform Rule |
| Sep 1, 2010 | Sep 30, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | Total Coliform Rule |
| Sep 1, 2010 | Sep 30, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | Total Coliform Rule |
| Sep 1, 2010 | Sep 30, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2010 | Total Coliform Rule |
| Aug 1, 2010 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Jan 6, 2011 | Ground Water Rule |
| Aug 1, 2010 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Jan 6, 2011 | Ground Water Rule |
| Aug 1, 2010 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Jan 6, 2011 | Ground Water Rule |
| Aug 1, 2010 | Aug 31, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2010 | Total Coliform Rule |
| Aug 1, 2010 | Aug 31, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2010 | Total Coliform Rule |
| Aug 1, 2010 | Aug 31, 2010 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2010 | Total Coliform Rule |
| Jul 1, 2008 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 22, 2011 | Consumer Confidence Rule |
| Jul 1, 2008 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 22, 2011 | Consumer Confidence Rule |
| Jul 1, 2008 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 22, 2011 | Consumer Confidence Rule |
| Jul 1, 2008 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 22, 2011 | Consumer Confidence Rule |
| Jan 1, 2008 | Dec 31, 2010 | Dalapon | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | HEXACHLOROBENZENE | MR | No | Yes | — | 0.001 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Hexachlorocyclopentadiene | MR | No | Yes | — | 0.05 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Simazine | MR | No | Yes | — | 0.004 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Dinoseb | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Atrazine | MR | No | Yes | — | 0.003 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Chlordane | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | OXAMYL | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | 2,4,5-TP | MR | No | Yes | — | 0.05 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Carbofuran | MR | No | Yes | — | 0.04 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Endrin | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | BHC-GAMMA | MR | No | Yes | — | 0.0002 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Toxaphene | MR | No | Yes | — | 0.003 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Di(2-ethylhexyl) adipate | MR | No | Yes | — | 0.4 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Di(2-ethylhexyl) phthalate | MR | No | Yes | — | 0.006 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Picloram | MR | No | Yes | — | 0.5 mg/L | — | Resolved | Dec 31, 2010 | Synthetic Organic Chemicals |
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.