Oakland County, Michigan — public water systems

733 active public water systems serve Oakland County, reporting 1.1M people served.

Dataset updated July 2026 . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

733

Population served

1.1M

Community systems

104

Groundwater share

95.2%

Water systems in Oakland County

Active public water systems in Oakland County, Michigan
#	Water system	County	Population served	Type	Source
1	Troy	Oakland	85,854	Community	Purchased surface water
2	Rochester Hills	Oakland	74,000	Community	Purchased surface water
3	Waterford Township	Oakland	73,441	Community	Groundwater
4	Southfield	Oakland	71,739	Community	Purchased surface water
5	Pontiac	Oakland	63,776	Community	Purchased surface water
6	Royal Oak, City of	Oakland	57,236	Community	Purchased surface water
7	Farmington Hills, City of	Oakland	56,984	Community	Purchased surface water
8	Novi, City of	Oakland	56,780	Community	Purchased surface water
9	West Bloomfield Township	Oakland	49,479	Community	Purchased surface water
10	Bloomfield Township	Oakland	41,691	Community	Purchased surface water
11	Orion Township	Oakland	33,000	Community	Purchased surface water
12	Madison Heights	Oakland	29,694	Community	Purchased surface water
13	Oak Park	Oakland	29,654	Community	Purchased surface water
14	Ferndale	Oakland	22,105	Community	Purchased surface water
15	Auburn Hills	Oakland	21,412	Community	Purchased surface water
16	Birmingham	Oakland	20,472	Community	Purchased surface water
17	Commerce Township	Oakland	19,811	Community	Purchased surface water
18	Hazel Park	Oakland	16,400	Community	Purchased surface water
19	Berkley	Oakland	14,970	Community	Purchased surface water
20	Wixom, City of	Oakland	13,928	Community	Purchased surface water
21	Clawson	Oakland	11,825	Community	Purchased surface water
22	Independence Township	Oakland	11,790	Community	Groundwater
23	Farmington, City of	Oakland	11,597	Community	Purchased surface water
24	South Lyon, City of	Oakland	11,055	Community	Groundwater
25	Beverly Hills	Oakland	10,451	Community	Purchased surface water
26	Oxford Township	Oakland	10,407	Community	Groundwater
27	Lyon Township	Oakland	9,390	Community	Groundwater
28	Holly, Village of	Oakland	8,557	Community	Groundwater
29	Rochester	Oakland	7,130	Community	Groundwater
30	Milford, Village of	Oakland	6,366	Community	Groundwater
31	Huntington Woods	Oakland	6,200	Community	Purchased surface water
32	White Lake Township	Oakland	5,799	Community	Groundwater
33	Gm Proving Grounds Well 5, 7, 8, 9	Oakland	5,500	Non-transient non-community	Groundwater
34	Walled Lake, City of	Oakland	5,260	Community	Purchased surface water
35	Rochester East	Oakland	5,100	Community	Purchased surface water
36	Southwest Oakland Township	Oakland	4,943	Community	Groundwater
37	Lathrup Village	Oakland	4,075	Community	Purchased surface water
38	Highland Township	Oakland	3,837	Community	Groundwater
39	Bloomfield Hills	Oakland	3,579	Community	Purchased surface water
40	Oxford, Village of	Oakland	3,540	Community	Groundwater
41	Kensington Water Park	Oakland	3,325	Transient non-community	Groundwater
42	Springs/Portsmouth Apartments	Oakland	3,200	Community	Groundwater
43	Lake Orion, Village of	Oakland	2,973	Community	Purchased surface water
44	Pleasant Ridge	Oakland	2,872	Community	Purchased surface water
45	Keego Harbor, City of	Oakland	2,740	Community	Purchased surface water
46	Highland Greens Estates	Oakland	2,268	Community	Groundwater
47	Orchard Lake Village	Oakland	2,194	Community	Purchased surface water
48	Sylvan Lake	Oakland	2,155	Community	Purchased surface water
49	Southeast Oakland Township	Oakland	1,923	Community	Groundwater
50	Royal Oak Township	Oakland	1,869	Community	Purchased surface water