EPA EXPORT · 13 SEP 2026FEDERAL COMPLIANCE RECORDS · NOT A HOME WATER TEST
TAP WATERLEDGERPublic system compliance records

COUNTY WATER-SYSTEM LEDGER

Stanislaus, California

Compare active community water systems serving this county in EPA's public export. Systems can serve multiple places, so population totals may overlap.

Systems12active CWS · pop. 2,500+
Population served472,787reported total; may overlap
Current violation flag25.0%3 systems
Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving Stanislaus

Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.

Water systemPopulation servedPrimary sourceCurrent export status
Modesto, City OfCA5010010218,771Surface water purchasedNo current violation flagged
Turlock, City OfCA501001972,682Surface water purchasedNo current violation flagged
Ceres, City OfCA501002854,513Surface water purchasedCurrent health-based flag
Patterson, City OfCA501001724,977Ground waterNo current violation flagged
Riverbank, City OfCA501001824,834Ground waterNo current violation flagged
Oakdale, City OfCA501001423,235Ground waterCurrent health-based flag
City Of Modesto - SalidaCA501000514,537Surface water purchasedNo current violation flagged
City Of Newman-Water DepartmentCA501001312,207Ground waterNo current violation flagged
City Of WaterfordCA50100068,788Ground waterNo current violation flagged
Hughson, City OfCA50100087,481Ground waterCurrent health-based flag
Keyes Community Services Dist.CA50100095,672Ground waterNo current violation flagged
Denair Community Services DistrictCA50100215,090Ground waterNo current violation flagged

02 / SOURCE MIX

Surface water purchased4 systems · 360,503 served
Ground water8 systems · 112,284 served
How to read the population total

It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.