ANN ARBOR
Michigan - Community Water System - PWSID: MI0000220
System Information
| PWSID | MI0000220 |
| System Name | ANN ARBOR |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 3, 1981 |
| Last Reported | Mar 30, 2026 |
Location & Contact
| State | Michigan |
| City | ANN ARBOR |
| ZIP Code | 48103 |
| Address | 919 SUNSET RD |
| Organization | MACIEJEWSKI, MOLLY |
| Phone | 734-794-6000 |
Population & Service
| Population Served | 123,851 |
| Service Connections | 26,050 |
Drinking Water Violations (119)
This water system has 119 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, 2016 | Nov 30, 2016 | MR | No | Yes | - | - | - | Resolved | Nov 30, 2016 | - | |
| Nov 1, 2016 | Nov 30, 2016 | MR | No | Yes | - | - | - | Resolved | Nov 30, 2016 | - | |
| Nov 1, 2016 | Nov 30, 2016 | MR | No | Yes | - | - | - | Resolved | Nov 30, 2016 | - | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | - | TT | - | Resolved | Mar 21, 2011 | - | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | - | TT | - | Resolved | Mar 21, 2011 | - | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | - | TT | - | Resolved | Mar 21, 2011 | - | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | - | TT | - | Resolved | Mar 21, 2011 | - | |
| Jan 1, 2008 | Jan 31, 2008 | TT | Yes | No | - | - | - | Resolved | Jan 8, 2008 | - | |
| Jan 1, 2008 | Jan 31, 2008 | TT | Yes | No | - | - | - | Resolved | Jan 8, 2008 | - | |
| Jan 1, 2008 | Jan 31, 2008 | TT | Yes | No | - | - | - | Resolved | Jan 8, 2008 | - | |
| Jan 1, 2008 | Jan 31, 2008 | TT | Yes | No | - | - | - | Resolved | Jan 8, 2008 | - | |
| Jan 1, 2008 | Sep 30, 2008 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Sep 30, 2008 | - | |
| Jan 1, 2008 | Sep 30, 2008 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Sep 30, 2008 | - | |
| Jan 1, 2008 | Sep 30, 2008 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Sep 30, 2008 | - | |
| Jan 1, 2008 | Sep 30, 2008 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Sep 30, 2008 | - | |
| Jan 1, 2008 | Sep 30, 2008 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Sep 30, 2008 | - | |
| Jul 1, 2006 | Jul 31, 2006 | TT | Yes | No | - | - | - | Resolved | Jul 18, 2006 | - | |
| Jul 1, 2006 | Jul 31, 2006 | TT | Yes | No | - | - | - | Resolved | Jul 18, 2006 | - | |
| Jul 1, 2006 | Jul 31, 2006 | TT | Yes | No | - | - | - | Resolved | Jul 18, 2006 | - | |
| Jul 1, 2006 | Jul 31, 2006 | TT | Yes | No | - | - | - | Resolved | Jul 18, 2006 | - | |
| Jun 1, 2006 | Jun 30, 2006 | TT | Yes | No | - | - | - | Resolved | Jun 21, 2006 | - | |
| Jun 1, 2006 | Jun 30, 2006 | TT | Yes | No | - | - | - | Resolved | Jun 21, 2006 | - | |
| Jun 1, 2006 | Jun 30, 2006 | TT | Yes | No | - | - | - | Resolved | Jun 21, 2006 | - | |
| Sep 1, 2005 | Sep 30, 2005 | MR | No | No | - | - | - | Resolved | Sep 7, 2005 | - | |
| Sep 1, 2005 | Sep 30, 2005 | MR | No | No | - | - | - | Resolved | Sep 7, 2005 | - | |
| Sep 1, 2005 | Sep 30, 2005 | MR | No | No | - | - | - | Resolved | Sep 7, 2005 | - | |
| Jul 1, 2004 | Sep 30, 2004 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Sep 30, 2004 | - | |
| Jul 1, 2004 | Sep 30, 2004 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Sep 30, 2004 | - | |
| Jul 1, 2004 | Sep 30, 2004 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Sep 30, 2004 | - | |
| Jul 1, 2004 | Sep 30, 2004 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Sep 30, 2004 | - | |
| Sep 1, 2003 | Sep 30, 2003 | MR | No | No | - | - | - | Resolved | Sep 18, 2003 | - | |
| Sep 1, 2003 | Sep 30, 2003 | MR | No | No | - | - | - | Resolved | Sep 18, 2003 | - | |
| Sep 1, 2003 | Sep 30, 2003 | MR | No | No | - | - | - | Resolved | Sep 18, 2003 | - | |
| Aug 1, 2003 | Aug 31, 2003 | MR | No | No | - | - | - | Resolved | Aug 19, 2003 | - | |
| Aug 1, 2003 | Aug 31, 2003 | MR | No | No | - | - | - | Resolved | Aug 19, 2003 | - | |
| Aug 1, 2003 | Aug 31, 2003 | MR | No | No | - | - | - | Resolved | Aug 19, 2003 | - | |
| Apr 1, 2003 | Apr 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Apr 29, 2003 | - | |
| Apr 1, 2003 | Apr 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Apr 29, 2003 | - | |
| Apr 1, 2003 | Apr 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Apr 29, 2003 | - | |
| Apr 1, 2003 | Apr 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Apr 29, 2003 | - | |
| Apr 1, 2003 | Apr 30, 2003 | MR | No | No | - | 5% of samples | - | Resolved | Apr 29, 2003 | - | |
| Jul 1, 2002 | Jul 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Jul 22, 2002 | - | |
| Jul 1, 2002 | Jul 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Jul 22, 2002 | - | |
| Jul 1, 2002 | Jul 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Jul 22, 2002 | - | |
| Jul 1, 2002 | Jul 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Jul 22, 2002 | - | |
| Mar 1, 2002 | Mar 31, 2002 | TT | Yes | No | - | - | - | Resolved | Mar 14, 2002 | - | |
| Mar 1, 2002 | Mar 31, 2002 | TT | Yes | No | - | - | - | Resolved | Mar 14, 2002 | - | |
| Mar 1, 2002 | Mar 31, 2002 | TT | Yes | No | - | - | - | Resolved | Mar 14, 2002 | - | |
| Mar 1, 2002 | Mar 31, 2002 | TT | Yes | No | - | - | - | Resolved | Mar 14, 2002 | - | |
| Feb 1, 2002 | Feb 28, 2002 | TT | Yes | No | - | - | - | Resolved | Feb 28, 2002 | - |
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.