LAKE GROVE WATER DISTRICT
Oregon — Community Water System — PWSID: OR4100460
System Information
| PWSID | OR4100460 |
| System Name | LAKE GROVE WATER DISTRICT |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 12, 1979 |
| Last Reported | Dec 23, 2025 |
Location & Contact
| State | Oregon |
| City | LAKE OSWEGO |
| ZIP Code | 97035 |
| Address | PO BOX 1173 |
| Organization | LAKE GROVE WATER DISTRICT |
| Phone | 503-636-1617 |
Population & Service
| Population Served | 3,100 |
| Service Connections | 1,234 |
Drinking Water Violations (41)
This water system has 41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2024 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Nov 14, 2024 | Consumer Confidence Rule |
| Jul 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 24, 2023 | Consumer Confidence Rule |
| Oct 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 26, 2022 | Lead and Copper Rule |
| Jan 1, 2019 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jul 10, 2019 | Lead and Copper Rule |
| Jan 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | May 7, 2018 | Lead and Copper Rule |
| Apr 1, 2011 | Jun 30, 2011 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jun 30, 2011 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2011 | Jun 30, 2011 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jun 30, 2011 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2011 | Jun 30, 2011 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jun 30, 2011 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2011 | Jun 30, 2011 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jun 30, 2011 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2009 | Jun 30, 2009 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Jun 30, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2009 | Jun 30, 2009 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Jun 30, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2009 | Jun 30, 2009 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Jun 30, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2009 | Jun 30, 2009 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Jun 30, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2009 | Mar 31, 2009 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Mar 31, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2009 | Mar 31, 2009 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Mar 31, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2008 | Dec 31, 2008 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Dec 31, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2008 | Dec 31, 2008 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Dec 31, 2008 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2007 | Sep 30, 2007 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2007 | Sep 30, 2007 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Sep 30, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2007 | Jun 30, 2007 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jun 30, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2007 | Jun 30, 2007 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jun 30, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| May 1, 2006 | May 31, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2006 | Total Coliform Rule |
| Aug 1, 2004 | Aug 31, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2004 | Total Coliform Rule |
| Oct 19, 2003 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Feb 27, 2004 | Consumer Confidence Rule |
| Oct 1, 2003 | Oct 31, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2003 | Total Coliform Rule |
| Jul 1, 2003 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Feb 27, 2004 | Consumer Confidence Rule |
| Sep 1, 2002 | Sep 30, 2002 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2002 | Total Coliform Rule |
| Jul 1, 1999 | Jul 31, 1999 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1999 | Total Coliform Rule |
| Apr 1, 1997 | Apr 30, 1997 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 1997 | Total Coliform Rule |
| Feb 1, 1997 | Feb 28, 1997 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 1997 | Total Coliform Rule |
| Dec 1, 1996 | Dec 31, 1996 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 1996 | Total Coliform Rule |
| Jul 1, 1994 | Jul 31, 1994 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | Total Coliform Rule |
| Jul 1, 1994 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 1, 1997 | Lead and Copper Rule |
| Jul 1, 1993 | Jul 31, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1993 | Total Coliform Rule |
| Sep 1, 1991 | Sep 30, 1991 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 1991 | Total Coliform Rule |
| Jun 1, 1991 | Jun 30, 1991 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 1991 | Total Coliform Rule |
| Mar 1, 1991 | Mar 31, 1991 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 1991 | Total Coliform Rule |
| Jan 1, 1991 | Jan 31, 1991 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jan 31, 1991 | Total Coliform Rule |
| — | — | — | 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.