NORTHWEST NATURAL
Washington - Transient Non-Community - PWSID: WA5301306
System Information
| PWSID | WA5301306 |
| System Name | NORTHWEST NATURAL |
| System Type | Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Sep 3, 1998 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Washington |
| City | Olympia |
| ZIP Code | 98502 |
| Address | 3403 Steamboat Island Rd |
| Organization | NORTHWEST NATURAL |
| Phone | - |
Population & Service
| Population Served | 70 |
| Service Connections | 3 |
Drinking Water Violations (50)
This water system has 50 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov 1, 2025 | Nov 30, 2025 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Apr 1, 2022 | Apr 30, 2022 | MON | No | Yes | - | - | - | Resolved | Apr 30, 2022 | - | |
| Apr 1, 2022 | Apr 30, 2022 | MON | No | Yes | - | - | - | Resolved | Apr 30, 2022 | - | |
| Dec 1, 2021 | Dec 31, 2021 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2021 | - | |
| Dec 1, 2021 | Dec 31, 2021 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2021 | - | |
| Nov 1, 2021 | Nov 30, 2021 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2021 | - | |
| Nov 1, 2021 | Nov 30, 2021 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2021 | - | |
| Jul 1, 2020 | Jul 31, 2020 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2020 | - | |
| Jul 1, 2020 | Jul 31, 2020 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2020 | - | |
| Jun 1, 2020 | Jun 30, 2020 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2020 | - | |
| Jun 1, 2020 | Jun 30, 2020 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2020 | - | |
| May 1, 2020 | May 31, 2020 | MON | No | Yes | - | - | - | Resolved | May 31, 2020 | - | |
| May 1, 2020 | May 31, 2020 | MON | No | Yes | - | - | - | Resolved | May 31, 2020 | - | |
| Apr 1, 2020 | Apr 30, 2020 | MON | No | Yes | - | - | - | Resolved | Apr 30, 2020 | - | |
| Apr 1, 2020 | Apr 30, 2020 | MON | No | Yes | - | - | - | Resolved | Apr 30, 2020 | - | |
| Mar 1, 2020 | Mar 31, 2020 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2020 | - | |
| Mar 1, 2020 | Mar 31, 2020 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2020 | - | |
| Feb 1, 2019 | Feb 28, 2019 | MON | No | Yes | - | - | - | Resolved | Feb 28, 2019 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2016 | Dec 31, 2016 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Nov 1, 2015 | Nov 30, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2015 | - | |
| Sep 1, 2012 | Sep 30, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2012 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jul 1, 2006 | Jul 31, 2006 | MCL | Yes | No | - | 5% of samples | - | Archived | Jul 31, 2006 | - | |
| Jun 1, 2005 | Jun 30, 2005 | MCL | Yes | No | - | 5% of samples | - | Archived | Jun 30, 2005 | - | |
| Oct 1, 2003 | Oct 31, 2003 | MR | No | No | - | 5% of samples | - | Archived | Oct 31, 2003 | - | |
| Dec 1, 2000 | Dec 31, 2000 | MR | No | Yes | - | 5% of samples | - | Archived | Dec 31, 2000 | - | |
| Oct 1, 2000 | Oct 31, 2000 | MR | No | Yes | - | 5% of samples | - | Archived | Oct 31, 2000 | - | |
| Aug 1, 2000 | Aug 31, 2000 | MR | No | Yes | - | 5% of samples | - | Archived | Aug 31, 2000 | - | |
| May 1, 2000 | May 31, 2000 | MR | No | Yes | - | 5% of samples | - | Archived | May 31, 2000 | - | |
| Mar 1, 2000 | Mar 31, 2000 | MR | No | Yes | - | 5% of samples | - | Archived | Mar 31, 2000 | - | |
| Jul 1, 1999 | Jul 31, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Jul 31, 1999 | - | |
| Jun 1, 1999 | Jun 30, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Jun 30, 1999 | - | |
| May 1, 1999 | May 31, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | May 31, 1999 | - | |
| Mar 1, 1999 | Mar 31, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Mar 31, 1999 | - | |
| Feb 1, 1999 | Feb 28, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Feb 28, 1999 | - | |
| Nov 1, 1998 | Nov 30, 1998 | MR | No | Yes | - | 5% of samples | - | Archived | Nov 30, 1998 | - | |
| Oct 1, 1998 | Oct 31, 1998 | MR | No | Yes | - | 5% of samples | - | Archived | Oct 31, 1998 | - | |
| Sep 1, 1998 | Sep 30, 1998 | MR | No | Yes | - | 5% of samples | - | Archived | Sep 30, 1998 | - |
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.