Tap Truth EPA drinking water records, in plain English

County drinking water records

Merced County, CA drinking water systems

22 community water systems serve Merced County, CA, reporting 240,326 people served in all.

14 of them (64%) had at least one health-based violation in the last 10 years. 11 systems still have one unresolved.

19 rely mainly on groundwater and 3 on surface water, counting water bought from other systems.

16 systems filed a lead service line inventory listing 0 lead lines, 3 galvanized lines that must be replaced and 4,292 lines of unknown material.

Community water systems
22
People served, sum of each system's own figure
240,326
Systems with a health-based violation, last 10 years
14
Systems with one unresolved
11
Lead service lines in inventories
0

Water systems serving Merced County

22 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
City of Merced Merced, University of California-Merced and 1 more 93,692 Groundwater 0 0 0
City of Los Banos Los Banos 47,419 Groundwater 1 0 No inventory
City of Atwater Atwater 29,479 Groundwater 0 0 0
City of Livingston Livingston 14,894 Groundwater 2 2 0
Winton Water & Sanitary Dist Winton 9,745 Groundwater 1 2 0
Delhi CWD Delhi 7,784 Groundwater 0 1 0
City of Dos Palos South Dos Palos and Dos Palos and land outside them 7,452 Surface water 28 0 0
City of Gustine Gustine 6,110 Groundwater 1 2 No inventory
Cal Am - Meadowbrook Franklin and McSwain and land outside them 5,656 Groundwater 0 0 0
Hilmar County Water District Hilmar-Irwin 5,504 Groundwater 14 0 0
Planada CSD Planada 4,164 Groundwater 1 2 No inventory
Santa Nella County Water District Santa Nella 2,211 Surface water 0 0 0
Le Grand Comm Services Dist Outside cities and towns 1,739 Groundwater 8 2 0
Castle Airport Outside cities and towns 1,650 Groundwater 1 2 No inventory
John Latoracca Correctional Facility Outside cities and towns 800 Groundwater 0 0 0
San Luis Hills Outside cities and towns 779 Surface water 6 0 0
Volta Community SD Volta 406 Groundwater 1 2 0
Black Rascal Water Company Outside cities and towns 367 Groundwater 1 2 No inventory
Ballico CSD Ballico 238 Groundwater 1 0 0
El Nido Mobile Home Park El Nido 137 Groundwater 0 0 0
Country Club County WD Outside cities and towns 64 Groundwater 1 2 No inventory
Evergreen Mobile Home Park Winton 36 Groundwater 0 1 0

Cities and towns in Merced County

19 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