Water Quality in MODESTO, CA (95356)

EPA violation data for public water systems serving ZIP code 95356.

42

Total Violations

38

Health-Based

4

Monitoring / Reporting

40

Resolved

What does this mean?

40 of 42 violations have been resolved. 38 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 4 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.

Water systems: 25 Population served: 2,648

Violations Detail (42 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
NitrateHealth-BasedN/A12Mar 31, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A15Dec 31, 2024ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A11Dec 31, 2024ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
LEAD AND COPPER RULE REVISIONSMonitoringN/AN/AOct 16, 2024ActiveN/A
LEAD AND COPPER RULE REVISIONSHealth-BasedN/AN/AOct 16, 2024ActiveN/A
NitrateHealth-BasedN/A14Sep 30, 2024ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A11Sep 30, 2024ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Combined UraniumMonitoringN/AN/AJun 30, 2024ResolvedN/A
NitrateHealth-BasedN/A12Jun 30, 2024ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A11Jun 30, 2024ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath

Lead & Copper Levels

Violation Timeline

2025(1)

Nitrate

01

Mar 31Resolved

2024(12)

Nitrate

01

Dec 31Resolved

Nitrate

01

Dec 31Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Active

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Active

Nitrate

01

Sep 30Resolved

Nitrate

01

Sep 30Resolved

Combined Uranium

03

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Combined Uranium

03

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

How Does This Compare?

MODESTO (95356) has 42 recorded violations, including 38 health-based. 2 remain unresolved. Consider testing your tap water independently for added peace of mind.

Recommended Water Filters

Based on the contaminants detected in your area, these filter types may help improve your water quality.

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

NSF Certified Products → EPA Safe Drinking Water Guide →

Always look for filters certified by NSF International for the specific contaminants you want to remove.

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