Water Quality: Modesto, CA

16 water systems • 239,487 people served

Multiple Health Violations
37
Total Violations
6
Health-Based Violations
16
Water Systems
239,487
Population Served

Water Quality Summary

Modesto has 6 health-based violations on record, meaning one or more contaminants were found above EPA-established safe levels. Contaminants involved: Haloacetic Acids, Selenium. In total, 37 violations are on record for 16 water systems serving 239,487 people.

Contaminants Found

Haloacetic Acids
Selenium

Water Systems Serving Modesto

System Name PWSID Source Population Violations
MODESTO, CITY OF CA5010010 Surface Water 218,771 0
CITY OF MODESTO - SALIDA CA5010005 Groundwater 14,537 14
CITY OF MODESTO - DEL RIO CA5010029 Groundwater 1,327 0
CITY OF MODESTO - SOUTH TURLOCK CA5010023 Groundwater 1,099 0
CITY OF MODESTO - GRAYSON CA5010033 Groundwater 914 2
HILLSVIEW HOMES CA5010007 Groundwater 887 6
RIVERDALE PARK TRACT CSD CA5000019 Groundwater 610 8
BUENA VISTA MIGRANT CENTER CA4400763 Groundwater 455 4
PARK HEIGHTS MUTUAL WATER CO CA5000017 Groundwater 250 0
CITY OF MODESTO - WALNUT MANOR CA5010031 Groundwater 175 0
CITY OF MODESTO - NORTH TURLOCK CA5010034 Groundwater 172 0
CITY OF MODESTO - CENTRAL TURLOCK CA5010035 Groundwater 119 0
MORNINGSIDE MOBILEHOME PARK CA5000054 Groundwater 67 1
COUNTRY WESTERN MHRV CA5000080 Groundwater 55 1
RIVER ROAD MUTUAL WATER COMPANY CA5000020 Groundwater 26 1
MODESTO IRRIGATION DISTRICT CA5010038 Surface Water 23 0

Concerned About Your Water?

A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.

Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.

Data Sources

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.

Verify at epa.gov • Search ECHO for CA