TRI-STATE GENERATING STATION
Colorado - Non-Transient Non-Community - PWSID: NM3595017
System Information
| PWSID | NM3595017 |
| System Name | TRI-STATE GENERATING STATION |
| System Type | Non-Transient Non-Community |
| Water Source | Surface Water |
| Activity Status | Non-Inventory |
| Owner Type | Private |
| EPA Region | 06 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jul 16, 1981 |
| Last Reported | Mar 31, 2026 |
Location & Contact
| State | Colorado |
| City | DENVER |
| ZIP Code | 80233-0695 |
| Address | - |
| Organization | CASIRARO, DANIEL J |
| Phone | 303-254-3923 |
Population & Service
| Population Served | - |
| Service Connections | 5 |
Drinking Water Violations (289)
This water system has 289 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| May 4, 2017 | - | Other | No | No | - | - | - | Resolved | Feb 22, 2021 | - | |
| Mar 1, 2016 | Mar 31, 2016 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2016 | - | |
| Mar 1, 2016 | Mar 31, 2016 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2016 | - | |
| Mar 1, 2016 | Mar 31, 2016 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2016 | - | |
| Jul 1, 2014 | Jun 30, 2015 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2015 | - | |
| Jul 1, 2014 | Jun 30, 2015 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jun 30, 2015 | - | |
| Jul 1, 2014 | Jun 30, 2015 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jun 30, 2015 | - | |
| Jul 1, 2014 | Jun 30, 2015 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2015 | - | |
| Jul 1, 2014 | Jun 30, 2015 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jun 30, 2015 | - | |
| Jul 1, 2014 | Jun 30, 2015 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jun 30, 2015 | - | |
| Jul 1, 2014 | Jun 30, 2015 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2015 | - | |
| Jul 1, 2014 | Jun 30, 2015 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2015 | - | |
| Jan 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jun 30, 2014 | - | |
| Jan 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2014 | - | |
| Jan 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jun 30, 2014 | - | |
| Jan 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jun 30, 2014 | - | |
| Jan 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jun 30, 2014 | - | |
| Jan 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2014 | - | |
| Jan 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2014 | - | |
| Jan 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2014 | - | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Dec 31, 2005 | - |
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.