ISSAQUAH VALLEY WATER ASSN #1
Washington - Community Water System - PWSID: WA5336300
System Information
| PWSID | WA5336300 |
| System Name | ISSAQUAH VALLEY WATER ASSN #1 |
| System Type | Community Water System |
| 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 | Mar 26, 2026 |
Location & Contact
| State | Washington |
| City | Issaquah |
| ZIP Code | 98027 |
| Address | 12719 Issaquah Hobart Rd SE |
| Organization | ISSAQUAH VALLEY WATER ASSN #1 |
| Phone | - |
Population & Service
| Population Served | 80 |
| Service Connections | 21 |
Drinking Water Violations (40)
This water system has 40 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, 2022 | - | MR | No | No | - | TT | - | Resolved | Aug 27, 2025 | - | |
| Jan 1, 2019 | Dec 31, 2019 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2019 | - | |
| Jun 1, 2018 | - | TT | Yes | No | - | - | - | Resolved | Sep 12, 2018 | - | |
| Jun 1, 2018 | - | TT | Yes | No | - | - | - | Resolved | Sep 12, 2018 | - | |
| Feb 1, 2018 | Feb 28, 2018 | MON | No | Yes | - | - | - | Resolved | Feb 28, 2018 | - | |
| Feb 1, 2018 | Feb 28, 2018 | MON | No | Yes | - | - | - | Resolved | Feb 28, 2018 | - | |
| Aug 1, 2017 | Aug 31, 2017 | MON | No | Yes | - | - | - | Resolved | Aug 31, 2017 | - | |
| Aug 1, 2017 | Aug 31, 2017 | MON | No | Yes | - | - | - | Resolved | Aug 31, 2017 | - | |
| Jul 1, 2016 | - | Other | No | No | - | - | - | Resolved | Dec 14, 2016 | - | |
| Apr 1, 2015 | Apr 30, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2015 | - | |
| Jul 1, 2014 | - | Other | No | No | - | - | - | Resolved | Dec 18, 2014 | - | |
| Jan 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Nov 12, 2013 | - | |
| Sep 1, 2012 | Sep 30, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2012 | - | |
| Jul 1, 2011 | - | Other | No | No | - | - | - | Resolved | Nov 28, 2011 | - | |
| Oct 1, 2010 | Oct 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2010 | - | |
| Jul 1, 2010 | - | Other | No | No | - | - | - | Resolved | Nov 23, 2010 | - | |
| Sep 1, 2004 | Sep 30, 2004 | MCL | Yes | No | - | 5% of samples | - | Archived | Sep 30, 2004 | - | |
| Dec 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Dec 31, 1999 | - | |
| Oct 19, 1999 | Jun 1, 2000 | Other | No | Yes | - | - | - | Resolved | Jun 1, 2000 | - | |
| Oct 19, 1999 | Jun 1, 2000 | Other | No | Yes | - | - | - | Resolved | Jun 1, 2000 | - | |
| Aug 1, 1999 | Aug 31, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Aug 31, 1999 | - | |
| Oct 1, 1997 | Oct 1, 2000 | MR | No | No | - | TT | - | Resolved | Oct 1, 2000 | - | |
| Nov 1, 1996 | Nov 30, 1996 | MCL | Yes | No | - | 5% of samples | - | Archived | Nov 30, 1996 | - | |
| Nov 1, 1996 | Nov 30, 1996 | MCL | Yes | No | - | 5% of samples | - | Archived | Nov 30, 1996 | - | |
| Nov 1, 1996 | Nov 30, 1996 | MCL | Yes | No | - | 5% of samples | - | Archived | Nov 30, 1996 | - | |
| May 1, 1992 | May 31, 1992 | MR | No | No | - | 5% of samples | - | Archived | May 31, 1992 | - | |
| May 1, 1992 | May 31, 1992 | MR | No | No | - | 5% of samples | - | Archived | May 31, 1992 | - | |
| Apr 1, 1992 | Apr 30, 1992 | MR | No | Yes | - | 5% of samples | - | Archived | Apr 30, 1992 | - | |
| Apr 1, 1992 | Apr 30, 1992 | MR | No | Yes | - | 5% of samples | - | Archived | Apr 30, 1992 | - | |
| Feb 1, 1992 | Feb 29, 1992 | MR | No | Yes | - | 5% of samples | - | Archived | Feb 29, 1992 | - | |
| Oct 1, 1991 | Oct 31, 1991 | MR | No | Yes | - | 5% of samples | - | Archived | Oct 31, 1991 | - | |
| Oct 1, 1979 | Oct 31, 1979 | MR | No | No | - | 15 pCi/L | - | Archived | Oct 31, 1979 | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - |
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.