Tap Truth EPA drinking water records, in plain English

County drinking water records

Orange County, CA drinking water systems

39 community water systems serve Orange County, CA, reporting 3,179,173 people served in all.

3 of them (8%) had at least one health-based violation in the last 10 years. 2 systems still have one unresolved.

6 rely mainly on groundwater and 33 on surface water, counting water bought from other systems.

38 systems filed a lead service line inventory listing 0 lead lines, 143 galvanized lines that must be replaced and 0 lines of unknown material.

1 more system is placed in Orange County, CA by the county its records name because it has no service area map that lines up with its own records, so it is listed apart and not counted here.

Community water systems
39
People served, sum of each system's own figure
3,179,173
Systems with a health-based violation, last 10 years
3
Systems with one unresolved
2
Lead service lines in inventories
0

Water systems serving Orange County

39 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
Irvine Ranch Water District Irvine, Lake Forest and 5 more 444,800 Surface water 0 0 0
City of Anaheim Anaheim 348,593 Surface water 0 0 0
City of Santa Ana Santa Ana 310,539 Purchased surface water 0 0 0
City of Huntington Beach Huntington Beach 201,000 Purchased surface water 0 0 0
City of Garden Grove Garden Grove 174,226 Purchased surface water 0 0 0
Moulton Niguel Water District Laguna Niguel, Aliso Viejo and 2 more 170,236 Purchased surface water 0 0 0
Santa Margarita Water District Rancho Mission Viejo, Mission Viejo and 5 more 168,289 Purchased surface water 0 0 0
City of Fullerton Fullerton 139,461 Purchased surface water 1 0 0
City of Orange Orange 120,770 Purchased surface water 0 0 0
Golden State WC - West Orange County Cypress, Los Alamitos and 2 more 114,379 Purchased surface water 0 0 0
Mesa Water District Costa Mesa 110,000 Purchased surface water 0 0 0
City of Westminster Westminster 90,911 Purchased surface water 0 0 0
Yorba Linda Water District Yorba Linda and Placentia 84,292 Purchased surface water 0 0 0
City of Buena Park Buena Park 81,998 Purchased surface water 0 0 0
City of Newport Beach Newport Beach 68,572 Purchased surface water 0 0 0
City of Tustin Tustin and North Tustin 66,600 Purchased surface water 0 0 0
City of La Habra La Habra 63,118 Purchased surface water 0 0 0
City of Fountain Valley Fountain Valley 56,747 Purchased surface water 0 0 0
El Toro Water District Laguna Woods, Lake Forest and 2 more 51,800 Purchased surface water 0 0 0
City of San Clemente San Clemente 51,545 Purchased surface water 0 0 0
Golden State WC - Placentia/Yorba Linda Placentia 50,381 Purchased surface water 0 0 0
City of Brea Brea 48,479 Purchased surface water 0 0 0
South Coast Water District Dana Point and Laguna Beach 41,118 Purchased surface water 0 0 0
Santa Margarita Water District-ID9 San Juan Capistrano and Dana Point 39,684 Purchased surface water 0 0 0
City of Seal Beach Seal Beach 24,937 Purchased surface water 0 0 0
Laguna Beach County WD Laguna Beach 18,404 Purchased surface water 0 0 0
Trabuco Canyon Water District Trabuco Canyon and Rancho Santa Margarita 13,659 Purchased surface water 0 0 0
Golden State WC - Cowan Heights North Tustin 6,997 Purchased surface water 0 0 0
Serrano Water District Villa Park 5,659 Purchased surface water 0 0 0
Joint Regional Water Supply System Outside cities and towns 3,947 Purchased surface water 0 0 0
East Orange County WD - RZ North Tustin and land outside it 3,464 Purchased surface water 0 0 0
Eastside Water Association Midway City 2,000 Groundwater 0 0 0
Midway City Mutual WC Midway City 1,305 Groundwater 0 0 0
South Midway City Mutual Water Co. Midway City 891 Groundwater 0 0 0
Hynes Estates Mutual Water Co. Stanton 168 Groundwater 1 2 No inventory
Page Avenue Mutual Water Company Fullerton 119 Purchased surface water 0 0 0
Liberty Park Water Association Huntington Beach 85 Groundwater 4 2 0
East Orange County WD - WZ Dana Point Not reported Purchased surface water 0 0 0
SMWD - SJ Ground Water Plant Dana Point Not reported Groundwater 0 0 0

Systems placed by county record in Orange County

1 system

The service area map EPA has for this system does not line up with its own records. It is placed by the county its records name (the counties EPA lists it serving, or the county coded in its ID where EPA lists none), and without a map it is not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
City of La Palma County on record 15,948 Purchased surface water 0 0 0

Cities and towns in Orange County

45 places

Back to California

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