KAISER ALUM - TRENTWOOD WORKS
Washington — Non-Transient Non-Community — PWSID: WA5337450
System Information
| PWSID | WA5337450 |
| System Name | KAISER ALUM - TRENTWOOD WORKS |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 7, 1981 |
| Last Reported | Dec 11, 2025 |
Location & Contact
| State | Washington |
| City | Spokane |
| ZIP Code | 99215 |
| Address | PO Box 15108 |
| Organization | KAISER ALUM - TRENTWOOD WORKS |
| Phone | — |
Population & Service
| Population Served | 954 |
| Service Connections | 5 |
Drinking Water Violations (12)
This water system has 12 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 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jun 11, 2024 | Lead and Copper Rule |
| Jan 1, 2022 | Dec 31, 2022 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2022 | Nitrate Rule |
| Jan 1, 2022 | Dec 31, 2022 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2022 | Nitrate Rule |
| Jan 1, 2020 | Dec 31, 2020 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2020 | Nitrate Rule |
| Jan 1, 2020 | Dec 31, 2020 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2020 | Nitrate Rule |
| Jan 1, 2015 | Dec 31, 2015 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2015 | Nitrate Rule |
| Jan 1, 2014 | Dec 31, 2022 | Dalapon | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Dec 31, 2022 | Synthetic Organic Chemicals |
| Jan 1, 2014 | Dec 31, 2022 | Picloram | MR | No | Yes | — | 0.5 mg/L | — | Resolved | Dec 31, 2022 | Synthetic Organic Chemicals |
| Jan 1, 2014 | Dec 31, 2022 | 2,4,5-TP | MR | No | Yes | — | 0.05 mg/L | — | Resolved | Dec 31, 2022 | Synthetic Organic Chemicals |
| Jan 1, 2014 | Dec 31, 2022 | Pentachlorophenol | MR | No | Yes | — | 0.001 mg/L | — | Resolved | Dec 31, 2022 | Synthetic Organic Chemicals |
| Jan 1, 2014 | Dec 31, 2022 | Dinoseb | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Dec 31, 2022 | Synthetic Organic Chemicals |
| Jan 1, 2004 | Dec 31, 2004 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2004 | 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.