Riverside County, California — public water systems

199 active public water systems serve Riverside County, reporting 2.9M people served.

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

Active systems

199

Population served

2.9M

Community systems

Groundwater share

87.4%

Water systems in Riverside County

Active public water systems in Riverside County, California
#	Water system	County	Population served	Type	Source
1	Eastern Municipal Wd	Riverside	666,581	Community	Purchased surface water
2	Riverside, City of	Riverside	298,398	Community	Groundwater under influence of surface water
3	Coachella Vwd: Cove Community	Riverside	270,000	Community	Groundwater
4	Elsinore Valley Mwd	Riverside	169,455	Community	Surface water
5	Corona, City of	Riverside	168,575	Community	Purchased surface water
6	Rancho California Water District	Riverside	146,147	Community	Purchased surface water
7	Jurupa Community Sd	Riverside	135,093	Community	Purchased surface water
8	Anza Community Hall	Riverside	92,019	Transient non-community	Groundwater
9	Western Mwd	Riverside	86,062	Community	Purchased surface water
10	Indio Water Authority	Riverside	84,757	Community	Groundwater
11	Desert Water Agency	Riverside	74,807	Community	Surface water
12	Beaumont Cherry Valley Wd	Riverside	66,841	Community	Groundwater
13	Goose Creek Golf Club	Riverside	57,628	Non-transient non-community	Groundwater
14	Lake Hemet Mwd	Riverside	52,913	Community	Groundwater
15	Coachella Water Authority	Riverside	43,590	Community	Groundwater
16	Mission Springs Wd	Riverside	43,484	Community	Groundwater
17	Rubidoux Community Sd	Riverside	36,827	Community	Groundwater
18	Aguanga Market Water System	Riverside	36,012	Transient non-community	Groundwater
19	Hemet, City of	Riverside	33,828	Community	Purchased surface water
20	Banning, City of	Riverside	31,680	Community	Groundwater
21	Norco, City of	Riverside	25,068	Community	Purchased surface water
22	La Cocina	Riverside	24,524	Transient non-community	Groundwater
23	Temescal Valley Water District	Riverside	21,971	Community	Purchased surface water
24	San Jacinto, City of	Riverside	18,950	Community	Groundwater
25	Western Mwd - Murrieta Division	Riverside	17,453	Community	Purchased surface water
26	South Mesa Wc	Riverside	10,108	Community	Groundwater
27	Blythe - City of	Riverside	9,798	Community	Groundwater
28	Myoma Dunes Mutual Water Company	Riverside	9,445	Community	Groundwater
29	Diamond Valley Market Water	Riverside	9,005	Transient non-community	Groundwater
30	Caltrans, Cactus City Rest Area	Riverside	6,800	Transient non-community	Purchased surface water
31	Nuevo Water Company	Riverside	6,733	Community	Purchased surface water
32	Caltrans, Whitewater Rest Area	Riverside	6,000	Transient non-community	Groundwater
33	Santa Ana River Water Company	Riverside	5,848	Community	Groundwater
34	Valley Auto Water	Riverside	5,215	Transient non-community	Groundwater
35	Coachella Vwd: I.D. No. 8	Riverside	4,600	Community	Groundwater
36	California Rehabilitation Center - Norco	Riverside	4,300	Community	Purchased surface water
37	Chuckawalla Valley State Prison	Riverside	4,090	Community	Groundwater
38	Farm Mutual W.C. (the)	Riverside	4,026	Community	Purchased surface water
39	Idyllwild Water District	Riverside	3,762	Community	Groundwater
40	Box Springs Mutual Wc	Riverside	3,382	Community	Purchased surface water
41	Home Gardens County Wd	Riverside	3,095	Community	Purchased surface water
42	Victory Ranch	Riverside	3,004	Transient non-community	Groundwater
43	Terwilliger Association	Riverside	2,401	Transient non-community	Groundwater
44	Eisenhower Medical Center(Water)	Riverside	2,300	Non-transient non-community	Groundwater
45	Cabazon Water District	Riverside	2,010	Community	Groundwater
46	Mecca Arco Travel Center	Riverside	1,847	Non-transient non-community	Groundwater
47	Ladera Golf Club	Riverside	1,806	Non-transient non-community	Groundwater
48	Palm Springs Aerial Tramway	Riverside	1,799	Non-transient non-community	Purchased surface water
49	Pine Cove Water District	Riverside	1,540	Community	Groundwater
50	Hidden Valley Nature Center	Riverside	1,210	Transient non-community	Groundwater