Mendocino County, California — public water systems

144 active public water systems serve Mendocino County, reporting 82.9K people served.

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

Active systems

144

Population served

82.9K

Community systems

Groundwater share

81.3%

Water systems in Mendocino County

Active public water systems in Mendocino County, California
#	Water system	County	Population served	Type	Source
1	Ukiah, City of	Mendocino	16,607	Community	Surface water
2	Fort Bragg, City of	Mendocino	6,919	Community	Surface water
3	Willits, City of	Mendocino	6,175	Community	Surface water
4	Millview County Water District	Mendocino	5,500	Community	Surface water
5	Redwood Valley County Water District	Mendocino	5,200	Community	Surface water
6	Willow County Water District	Mendocino	3,797	Community	Purchased surface water
7	Brooktrails Township Csd	Mendocino	3,632	Community	Surface water
8	North Gualala Water Company	Mendocino	2,593	Community	Surface water
9	Rogina Water Company Inc..	Mendocino	2,554	Community	Groundwater
10	Csp-Van Damme State Park	Mendocino	2,004	Transient non-community	Surface water
11	U.S. Army Corps-Lake Mendo (Bushay Site)	Mendocino	2,000	Transient non-community	Groundwater
12	U.S. Army Corps-Lake Mendo (Kyen Cmpgrd)	Mendocino	1,500	Transient non-community	Groundwater
13	Csp-Mackerricher State Park	Mendocino	1,416	Transient non-community	Surface water
14	Laytonville County Water District	Mendocino	1,152	Community	Groundwater
15	Hopland Public Utility District	Mendocino	1,076	Community	Groundwater
16	Mendocino School District- Mendocino	Mendocino	579	Non-transient non-community	Groundwater
17	Dolphin Isle Marina	Mendocino	560	Community	Groundwater
18	Calpella County Water District	Mendocino	548	Community	Purchased surface water
19	Csp-Standish Hickey State Rec Area	Mendocino	503	Transient non-community	Surface water
20	Csp-Mendocino Headlands-Sea Arch	Mendocino	500	Transient non-community	Groundwater
21	Mendocino County Fairgrounds	Mendocino	500	Transient non-community	Groundwater
22	Point Arena Water Works	Mendocino	459	Community	Groundwater
23	Csp-Pt. Cabrillo Light Station Shp	Mendocino	430	Transient non-community	Surface water
24	Albion River Campground	Mendocino	425	Transient non-community	Groundwater under influence of surface water
25	Wente Scout Reservation	Mendocino	422	Transient non-community	Groundwater
26	Csp-Manchester State Park	Mendocino	420	Transient non-community	Groundwater
27	Csp-Mendocino Woodlands	Mendocino	400	Transient non-community	Groundwater under influence of surface water
28	City of 10,000 Buddhas	Mendocino	400	Community	Groundwater
29	Moss Cove Rest Stop (Caltrans)	Mendocino	400	Transient non-community	Groundwater
30	Elk County Water District	Mendocino	380	Community	Groundwater under influence of surface water
31	Csp-Westport State Beach	Mendocino	370	Transient non-community	Surface water
32	Westport County Water District	Mendocino	369	Community	Surface water
33	Hidden Pines Campground	Mendocino	362	Transient non-community	Groundwater
34	Anderson Valley Elementary School	Mendocino	350	Non-transient non-community	Groundwater
35	Camp Mendocino	Mendocino	321	Transient non-community	Surface water
36	Pine Mountain Mutual Water Co.	Mendocino	310	Community	Surface water
37	Potter Valley School District	Mendocino	309	Non-transient non-community	Groundwater under influence of surface water
38	Empire Rest Stop (Caltrans)	Mendocino	300	Transient non-community	Groundwater under influence of surface water
39	Irvine Lodge Rest Stop (Caltrans)	Mendocino	300	Transient non-community	Groundwater
40	Anderson Valley High School	Mendocino	300	Non-transient non-community	Groundwater
41	U.S. Army Corps-Lake Mendo (Pomo Site)	Mendocino	300	Transient non-community	Groundwater
42	Round Valley Elementary School	Mendocino	289	Non-transient non-community	Groundwater
43	Camp Navarro	Mendocino	284	Transient non-community	Groundwater under influence of surface water
44	Woodside Rv Park	Mendocino	280	Community	Groundwater under influence of surface water
45	Csp-Mendocino Headlands - Ford House	Mendocino	275	Transient non-community	Groundwater
46	Manchester Beach Koa	Mendocino	273	Transient non-community	Groundwater
47	Ridgewood Water System	Mendocino	265	Community	Groundwater under influence of surface water
48	Green Acres Trailer Park	Mendocino	256	Transient non-community	Groundwater
49	Irish Beach Water District	Mendocino	254	Community	Surface water
50	Ocean'S Edge Estates	Mendocino	250	Community	Groundwater