Water Quality in Modesto, CA (95304)
EPA violation data for public water systems serving ZIP code 95304.
Active Health Violations
27 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 88% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
15,841
Population
39
Water Systems
39
Violations (5yr)
27
Health-Based
Location
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Water Systems Serving This Area (39)
Modesto, City Of
City Of Stockton
3 health-basedCalifornia Water Service - Stockton
Tracy, City Of
Manteca, City Of
All resolvedTurlock, City Of
Lodi, City Of
Ceres, City Of
1 health-basedSan Joaquin River Club Inc
132 Investments Water System
1 health-basedFc Tracy Holdings, Llc
Banta Elementary School
Adkins Hill Village
Buehner Water System
Currier Estates Water Corp
All resolvedArp Minimart Corp Ws
Adkins Hill Mhp
Countryside Liquors & Gas
Glassfab Tempering Services Inc.
1 health-basedLeisure Estates Mobile Home Park
5 Bros (Formerly Brannan'S Island Marin)
Banta Mutual Water Co #1
Banta Inn Water System
Zapien Market
Chargin-Sossamon Water System
Banta Mutual Water Co #2
Dynatect Ro-Lab, Inc.
1 health-basedLodi Homes
Maze Blvd Mobilehome Park
Carmelo Industrial Park
1 health-basedStar Motel
13 health-basedGurdawara, Gur Nanak Parkash Water Syste
Mb Farms
Tracy Islamic Center Water System
Buehner Houses
Country Market
All resolvedSan-I-Pak Inc
6 health-basedWest 11th Street Chevron Water System
Banta Mutual Water Co #3
Contaminants Found
At high levels, nitrate can cause blue baby syndrome in infants.
Missed testing deadlines — not a detection of bacteria.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
Modesto (95304) has more violations than 88% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 39.
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.