Public water system
Ann Arbor
PWSID MI0000220 - Washtenaw County, Michigan
129 PPM
7.5 GPG
Moderately Hard0Soft60120180300+
Moderately Hard (129 PPM)Verified - Utility Reported
System Details
- Water source
- surface water
- Population served
- 241,868
- Service connections
- 26,050
- Status
- Active
Hardness Evidence
- Reported hardness
- 129 PPM
- Grains per gallon
- 7.5 GPG
- Data source
- Michigan utility report
- Source year
- N/A
- Raw/source estimate
- 261 PPM
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 48103 | Ann Arbor, MI | Moderately Hard (167 PPM) |
| 48104 | Ann Arbor, MI | Moderately Hard (167 PPM) |
| 48105 | Ann Arbor, MI | Moderately Hard (167 PPM) |
| 48108 | Ann Arbor, MI | Moderately Hard (167 PPM) |
| 48109 | Ann Arbor, MI | Moderately Hard (167 PPM) |
| 48118 | Chelsea, MI | Moderately Hard (166 PPM) |
| 48130 | Dexter, MI | Moderately Hard (165 PPM) |
| 48158 | Manchester, MI | Moderately Hard (164 PPM) |
| 48160 | Milan, MI | Moderately Hard (167 PPM) |
| 48176 | Saline, MI | Moderately Hard (168 PPM) |
| 48189 | Whitmore Lake, MI | Moderately Hard (164 PPM) |
| 48190 | Whittaker, MI | Moderately Hard (164 PPM) |
| 48191 | Willis, MI | Moderately Hard (163 PPM) |
| 48197 | Ypsilanti, MI | Moderately Hard (165 PPM) |
| 48198 | Ypsilanti, MI | Moderately Hard (165 PPM) |
| 49266 | Osseo, MI | Moderately Hard (129 PPM) |
How to Use This System Page
A public water system can serve multiple ZIP codes and cities. Use this page to inspect the source behind the hardness reading, then open the linked ZIP or city page for the local rollup.
If you are sizing treatment equipment, confirm your actual tap hardness with a home test or lab test before buying.