INDIAN RIDGE WATER ASSOCIATION
Washington — Community Water System — PWSID: WA5335639
System Information
| PWSID | WA5335639 |
| System Name | INDIAN RIDGE WATER ASSOCIATION |
| 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 | Dec 11, 2025 |
Location & Contact
| State | Washington |
| City | Maple Valley |
| ZIP Code | 98038 |
| Address | 28620 Maple Valley Black Diamond Rd SE |
| Organization | INDIAN RIDGE WATER ASSOCIATION |
| Phone | — |
Population & Service
| Population Served | 216 |
| Service Connections | 88 |
Drinking Water Violations (37)
This water system has 37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 1, 2025 | Aug 31, 2025 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Aug 31, 2025 | Revised Total Coliform Rule |
| Jan 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Aug 12, 2024 | Lead and Copper Rule |
| Jul 1, 2015 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 14, 2015 | Consumer Confidence Rule |
| Jul 1, 2013 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Dec 2, 2013 | Consumer Confidence Rule |
| Jul 1, 2012 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 24, 2012 | Consumer Confidence Rule |
| Jul 1, 2011 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Nov 7, 2011 | Consumer Confidence Rule |
| Jul 1, 2010 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 28, 2010 | Consumer Confidence Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Nov 1, 1997 | Nov 30, 1997 | Coliform (TCR) | MR | No | Yes | — | 5% of samples | — | Archived | Nov 30, 1997 | Total Coliform Rule |
| Oct 1, 1992 | Oct 31, 1992 | Coliform (TCR) | MR | No | Yes | — | 5% of samples | — | Archived | Oct 31, 1992 | Total Coliform Rule |
| Aug 1, 1992 | Aug 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Aug 31, 1992 | Total Coliform Rule |
| Jul 1, 1992 | Jul 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jul 31, 1992 | Total Coliform Rule |
| Nov 1, 1991 | Nov 30, 1991 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Nov 30, 1991 | Total Coliform Rule |
| Oct 1, 1991 | Oct 31, 1991 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Oct 31, 1991 | Total Coliform Rule |
| Oct 1, 1991 | Oct 31, 1991 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Oct 31, 1991 | Total Coliform Rule |
| Oct 1, 1991 | Oct 31, 1991 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Oct 31, 1991 | Total Coliform Rule |
| Oct 1, 1991 | Oct 31, 1991 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Oct 31, 1991 | Total Coliform Rule |
| Oct 1, 1979 | Oct 31, 1979 | Gross Alpha, Excl. Radon and U | MR | No | No | — | 15 pCi/L | — | Archived | Oct 31, 1979 | Radionuclides and Revised Rad Rule |
| Oct 1, 1979 | Oct 31, 1979 | Chromium | MR | No | No | — | 0.1 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| Oct 1, 1979 | Oct 31, 1979 | Selenium | MR | No | No | — | 0.05 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| Oct 1, 1979 | Oct 31, 1979 | Mercury | MR | No | No | — | 0.002 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| Oct 1, 1979 | Oct 31, 1979 | Nitrate | MR | No | No | — | 10 mg/L | — | Archived | Oct 31, 1979 | Nitrate Rule |
| Oct 1, 1979 | Oct 31, 1979 | Fluoride | MR | No | No | — | 4.0 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| Oct 1, 1979 | Oct 31, 1979 | Barium | MR | No | No | — | 2 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| Oct 1, 1979 | Oct 31, 1979 | Cadmium | MR | No | No | — | 0.005 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| Oct 1, 1979 | Oct 31, 1979 | Arsenic | MR | No | No | — | 0.010 mg/L | — | Archived | Oct 31, 1979 | Arsenic 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.