Tap Truth EPA drinking water records, in plain English

County drinking water records

Stanislaus County, CA drinking water systems

57 community water systems serve Stanislaus County, CA, reporting 488,430 people served in all.

18 of them (32%) had at least one health-based violation in the last 10 years. 8 systems still have one unresolved.

45 rely mainly on groundwater and 12 on surface water, counting water bought from other systems.

53 systems filed a lead service line inventory listing 0 lead lines, 261 galvanized lines that must be replaced and 4,423 lines of unknown material.

4 more systems are placed in Stanislaus County, CA by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
57
People served, sum of each system's own figure
488,430
Systems with a health-based violation, last 10 years
18
Systems with one unresolved
8
Lead service lines in inventories
0

Water systems serving Stanislaus County

57 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 Modesto Modesto, West Modesto and 6 more 218,771 Purchased surface water 0 0 No inventory
City of Turlock Turlock 72,682 Purchased surface water 1 0 0
City of Ceres Ceres 54,513 Purchased surface water 1 2 No inventory
City of Patterson Patterson 24,977 Groundwater 0 0 0
City of Riverbank Riverbank 24,834 Groundwater 1 0 0
City of Oakdale Oakdale 23,235 Groundwater 1 0 No inventory
City of Modesto - Salida Salida and Modesto 14,537 Purchased surface water 0 0 0
City of Newman-Water Department Newman and land outside it 12,207 Groundwater 1 0 0
City of Waterford Waterford and Modesto 8,788 Groundwater 0 0 0
City of Hughson Hughson 7,481 Groundwater 36 2 0
Keyes Community Services Dist. Keyes 5,672 Groundwater 15 0 0
Denair Community Services District Denair 5,090 Groundwater 0 0 0
Western Hills Water District/Diablo Gran Diablo Grande 2,000 Surface water 3 0 0
Oid-Oakdale Rural Water System #1 East Oakdale 1,570 Groundwater 0 0 0
City of Modesto - Del Rio Del Rio and Modesto 1,327 Groundwater 0 0 0
City of Modesto - South Turlock Turlock and Modesto and land outside them 1,099 Purchased surface water 0 0 0
Waterford-River Pointe Waterford 1,079 Groundwater 0 0 0
City of Modesto - Grayson Grayson and Modesto 914 Groundwater 0 0 0
Hillsview Homes Westley 887 Groundwater 0 0 0
Riverdale Park Tract CSD Riverdale Park 610 Groundwater 2 0 0
Waterford - Hickman Hickman and Modesto 597 Groundwater 0 0 0
Riverview Mobile Home Estates Outside cities and towns 540 Groundwater 22 0 0
Crows Landing Comm SVC District Crows Landing 500 Groundwater 1 2 0
Sunrise Village MHP Outside cities and towns 353 Groundwater 1 2 No inventory
Oid #51 - Sunset Oaks #10 East Oakdale 287 Groundwater 0 0 0
Oid #46 - Sunset Oaks East Oakdale 269 Groundwater 0 0 0
Park Heights Mutual Water Co Outside cities and towns 250 Groundwater 0 0 0
North Oaks Mutual Water Co East Oakdale 234 Groundwater 0 0 0
Casa De Amigos Manufactured Housing Comm Outside cities and towns 204 Groundwater 0 0 0
Tid/ La Grange Water System La Grange 195 Surface water 0 0 0
Monterey Park Tract CSD Monterey Park Tract 186 Purchased groundwater 0 1 0
City of Modesto - Walnut Manor Modesto and land outside it 175 Purchased surface water 0 0 0
City of Modesto - North Turlock Turlock and Modesto 172 Purchased surface water 0 0 0
Knights Ferry Comm. SVC. Dist. Knights Ferry 168 Surface water 5 0 0
Olive Lane Mobilehome Park Outside cities and towns 153 Groundwater 0 0 0
Oid #22 - Williams Tract Outside cities and towns 150 Groundwater 0 0 0
Buehner Water System Outside cities and towns 150 Groundwater 0 0 0
Mulberry MHP Outside cities and towns 148 Groundwater 0 0 0
Oid #45 East Oakdale 144 Groundwater 0 0 0
Lazy B Mobilehome Park Outside cities and towns 125 Groundwater 2 0 0
Fisherman's Bend MHP Outside cities and towns 120 Groundwater 0 0 0
City of Modesto - Central Turlock Turlock and Modesto 119 Purchased surface water 0 0 0
Twin Cypress Mobile Home Park Orange Blossom 112 Groundwater 0 0 0
Del Rio East HOA Water System Del Rio 110 Groundwater 0 2 0
Oasis Investments Outside cities and towns 75 Groundwater 0 0 0
Westley CSD Westley 70 Purchased groundwater 1 2 0
Morningside Mobilehome Park Outside cities and towns 67 Groundwater 0 0 0
4N Mobilehome Park Outside cities and towns 65 Groundwater 0 0 0
Lone Pine MHP Oakdale 64 Groundwater 0 0 0
Martin's Mobile Home Court Outside cities and towns 60 Groundwater 23 0 0
Country Villa Apts Outside cities and towns 60 Groundwater 37 0 0
Tully Mobile Estates Outside cities and towns 56 Groundwater 0 0 0
Country Western MHRV Outside cities and towns 55 Groundwater 0 1 0
Cobles Corner Outside cities and towns 50 Groundwater 34 0 0
Foster Farms #5 Outside cities and towns 26 Groundwater 0 0 0
Buehner Houses Outside cities and towns 25 Groundwater 0 0 0
Modesto Irrigation District Modesto, Salida and 7 more and land outside them 23 Surface water 0 0 0

Systems placed by county record in Stanislaus County

4 systems

EPA has no service area map for some of these systems, and the maps it has for the others do not line up with their own records. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Maze Blvd Mobilehome Park County on record 36 Groundwater 0 2 No inventory
River Road Mutual Water Company County on record 26 Groundwater 0 2 No inventory
South San Joaquin Irrigation District County on record 25 Surface water 0 0 0
Stanislaus Regional Water Authority County on record Not reported Surface water 0 0 0

Cities and towns in Stanislaus County

31 places

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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