Tap Truth EPA drinking water records, in plain English

County drinking water records

Washtenaw County, MI drinking water systems

28 community water systems serve Washtenaw County, MI, reporting 260,935 people served in all. A system that also serves other counties counts all of its customers here.

5 of them (18%) had at least one health-based violation in the last 10 years. 5 systems still have one unresolved.

21 rely mainly on groundwater and 7 on surface water, counting water bought from other systems.

Their lead service line inventories list 203 lead lines, 905 galvanized lines that must be replaced and 4,227 lines of unknown material.

4 more systems are placed in Washtenaw County, MI by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
28
People served, sum of each system's own figure
260,935
Systems with a health-based violation, last 10 years
5
Systems with one unresolved
5
Lead service lines in inventories
203

Water systems serving Washtenaw County

28 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Ann Arbor Ann Arbor 123,851 Surface water 0 0 0
Ypsilanti Community Utility Authority Ypsilanti and land outside it 53,988 Purchased surface water 0 0 155
Pittsfield Township Ann Arbor and land outside it 24,500 Purchased surface water 0 0 0
Saline Saline 9,158 Groundwater 0 0 43
Scio Township Ann Arbor and land outside it 8,500 Purchased surface water 0 0 0
Milan Milan 7,363 Groundwater 0 0 4
Superior Township Ypsilanti and land outside it 6,830 Purchased surface water 1 0 0
Chelsea Chelsea 5,474 Groundwater 0 0 0
Dexter Dexter 4,500 Groundwater 0 0 0
Augusta Township Outside cities and towns 3,907 Purchased surface water 0 0 0
Manchester Manchester 2,150 Groundwater 0 0 1
Northville Crossing Outside cities and towns 1,890 Groundwater 0 0 0
Loch Alpine Sanitary Authority Ann Arbor and land outside it 1,506 Groundwater 0 1 0
Ann Arbor Township Ann Arbor and land outside it 1,338 Purchased surface water 0 0 0
Thornton Farms Outside cities and towns 1,188 Groundwater 0 0 0
Andelina Farms Outside cities and towns 750 Groundwater 0 0 0
Orchard Grove Outside cities and towns 725 Groundwater 0 0 0
River Ridge - Saline Outside cities and towns 720 Groundwater 0 0 0
Barton Hills Barton Hills and Ann Arbor 450 Groundwater 0 1 0
Saline Valley Farms Outside cities and towns 375 Groundwater 1 1 0
Westbrook Apartments Whitmore Lake 330 Groundwater 1 1 0
Harbor Cove Apartments Whitmore Lake 288 Groundwater 0 0 0
Austin Commons II Outside cities and towns 280 Groundwater 0 0 0
Sylvan Township Chelsea and land outside it 263 Groundwater 0 0 0
Village at Eagle Gardens Whitmore Lake 193 Groundwater 1 0 0
Regency at Whitmore Lake Whitmore Lake 190 Groundwater 1 3 0
Copper Meadows Outside cities and towns 128 Groundwater 0 0 0
Sisters of Mary, Mother of Eucharist Ann Arbor and land outside it 100 Groundwater 0 0 0

Systems placed by county record in Washtenaw County

4 systems

EPA has no service area map for some of these systems, and the maps it has for the others do not line up with their own records. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Northfield Estates County on record 1,620 Groundwater 0 0 0
Chestnut Hills County on record 813 Groundwater 0 0 0
Pleasant Lake Park LLC County on record 60 Groundwater 0 0 0
St. Louis Center County on record 56 Groundwater 4 0 0

Cities and towns in Washtenaw County

8 places

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Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations