Water Quality in MARICOPA, AZ (85139)

EPA violation data for public water systems serving ZIP code 85139.

346

Total Violations

158

Health-Based

188

Monitoring / Reporting

344

Resolved

What does this mean?

344 of 346 violations have been resolved. 158 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 188 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: 12 Population served: 3,692

Violations Detail (346 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Public NoticeMonitoringN/AN/ASep 26, 2025ActiveN/A
Public NoticeMonitoringN/AN/AJul 11, 2025ActiveN/A
NitrateHealth-BasedN/A30Jun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A30Jun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A30Jun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A21Jun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A21Jun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A21Jun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A31Mar 31, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A31Mar 31, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath

Lead & Copper Levels

Violation Timeline

2025(19)

Public Notice

76

Sep 26Active

Public Notice

75

Jul 11Active

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Public Notice

75

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Public Notice

75

Mar 31Resolved

Public Notice

75

Jan 16Resolved

Public Notice

75

Jan 16Resolved

2024(76)

Nitrate

01

Dec 31Resolved

Nitrate

01

Dec 31Resolved

Nitrate

01

Dec 31Resolved

Nitrate

01

Dec 31Resolved

Nitrate

01

Dec 31Resolved

Nitrate

01

Dec 31Resolved

Nitrate

01

Dec 31Resolved

Nitrate

01

Dec 31Resolved

Public Notice

75

Dec 19Resolved

Public Notice

75

Dec 19Resolved

Public Notice

75

Dec 19Resolved

Public Notice

75

Dec 19Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

Public Notice

75

Oct 10Resolved

Public Notice

75

Oct 10Resolved

Nitrate

01

Sep 30Resolved

Nitrate

01

Sep 30Resolved

Nitrate

01

Sep 30Resolved

Nitrate

01

Sep 30Resolved

Nitrate

01

Sep 30Resolved

Nitrate

01

Sep 30Resolved

Nitrate

01

Sep 30Resolved

Nitrate

01

Sep 30Resolved

Revised Total Coliform Rule

5A

Aug 31Resolved

Revised Total Coliform Rule

5A

Aug 31Resolved

Revised Total Coliform Rule

5A

Jul 31Resolved

Revised Total Coliform Rule

5A

Jul 31Resolved

Public Notice

75

Jul 20Resolved

Public Notice

75

Jul 20Resolved

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Nitrate

02

Jun 30Resolved

Nitrate

02

Jun 30Resolved

Nitrate

02

Jun 30Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Nitrate

02

Mar 31Resolved

Public Notice

75

Mar 31Resolved

Nitrate

02

Mar 31Resolved

Nitrate

02

Mar 31Resolved

Nitrate

02

Mar 31Resolved

Public Notice

75

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Groundwater Rule

45

Feb 20Resolved

Groundwater Rule

45

Feb 20Resolved

Groundwater Rule

45

Feb 20Resolved

Groundwater Rule

45

Feb 20Resolved

How Does This Compare?

MARICOPA (85139) has 346 recorded violations, including 158 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

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.

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