ANN ARBOR TOWNSHIP
Michigan — Community Water System — PWSID: MI0000221
System Information
| PWSID | MI0000221 |
| System Name | ANN ARBOR TOWNSHIP |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 13, 1987 |
| Last Reported | Dec 18, 2025 |
Location & Contact
| State | Michigan |
| City | ANN ARBOR |
| ZIP Code | 48105 |
| Address | 3792 PONTIAC TRL |
| Organization | O'CONNELL, DIANE |
| Phone | 734-663-3418 |
Population & Service
| Population Served | 1,338 |
| Service Connections | 535 |
Drinking Water Violations (7)
This water system has 7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec 1, 2016 | Feb 28, 2017 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Feb 28, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Dec 1, 2016 | Feb 28, 2017 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Feb 28, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Dec 1, 2016 | Feb 28, 2017 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Feb 28, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Dec 1, 2016 | Feb 28, 2017 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Feb 28, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Dec 1, 2016 | Feb 28, 2017 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Feb 28, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Dec 1, 2016 | Feb 28, 2017 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Feb 28, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Nov 1, 1992 | Nov 30, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 1992 | Total Coliform 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.