Water Quality in MARICOPA, AZ (85138)

EPA violation data for public water systems serving ZIP code 85138.

325

Total Violations

86

Health-Based

239

Monitoring / Reporting

310

Resolved

What does this mean?

310 of 325 violations have been resolved. 86 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 239 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: 40 Population served: 125,862

Violations Detail (325 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Revised Total Coliform RuleHealth-BasedN/AN/AJul 31, 2025ResolvedN/A
Revised Total Coliform RuleHealth-BasedN/AN/AJul 31, 2025ResolvedN/A
Revised Total Coliform RuleHealth-BasedN/AN/AJul 31, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AJul 18, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AJul 18, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AJul 18, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AJul 18, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AJul 18, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AJul 18, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AJul 18, 2025ResolvedN/A

Lead & Copper Levels

Violation Timeline

2025(20)

Revised Total Coliform Rule

1A

Jul 31Resolved

Revised Total Coliform Rule

1A

Jul 31Resolved

Revised Total Coliform Rule

1A

Jul 31Resolved

Public Notice

75

Jul 18Resolved

Public Notice

75

Jul 18Resolved

Public Notice

75

Jul 18Resolved

Public Notice

75

Jul 18Resolved

Public Notice

75

Jul 18Resolved

Public Notice

75

Jul 18Resolved

Public Notice

75

Jul 18Resolved

Public Notice

75

Jul 18Resolved

Public Notice

75

Apr 16Active

Public Notice

75

Apr 16Active

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Nitrate

01

Mar 31Resolved

Public Notice

75

Jan 24Resolved

Public Notice

75

Jan 24Resolved

Public Notice

75

Jan 19Active

Public Notice

75

Jan 19Active

2024(129)

Nitrate

02

Dec 31Resolved

Nitrate

02

Dec 31Resolved

Nitrate

02

Dec 31Resolved

Nitrate

02

Dec 31Resolved

Revised Total Coliform Rule

4B

Dec 31Resolved

Revised Total Coliform Rule

4B

Dec 31Resolved

Public Notice

75

Dec 19Resolved

Public Notice

75

Dec 19Resolved

Public Notice

75

Dec 19Resolved

Public Notice

75

Dec 19Resolved

Public Notice

75

Dec 19Resolved

Public Notice

75

Dec 19Resolved

Public Notice

75

Dec 19Active

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

2B

Nov 11Active

Revised Total Coliform Rule

2B

Nov 11Active

Groundwater Rule

45

Nov 1Resolved

Groundwater Rule

45

Nov 1Resolved

Groundwater Rule

45

Nov 1Resolved

Groundwater Rule

45

Nov 1Resolved

E. COLI

34

Oct 31Resolved

E. COLI

34

Oct 31Resolved

Revised Total Coliform Rule

4B

Oct 31Resolved

Revised Total Coliform Rule

4B

Oct 31Resolved

Revised Total Coliform Rule

2A

Oct 29Active

Revised Total Coliform Rule

2A

Oct 29Active

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

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

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

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 16Active

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Active

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Active

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Active

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

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Revised Total Coliform Rule

4B

Sep 30Resolved

Revised Total Coliform Rule

4B

Sep 30Resolved

E. COLI

34

Sep 30Resolved

E. COLI

34

Sep 30Resolved

Revised Total Coliform Rule

5A

Sep 30Resolved

Revised Total Coliform Rule

5A

Sep 30Resolved

Revised Total Coliform Rule

4B

Aug 31Resolved

Revised Total Coliform Rule

4B

Aug 31Resolved

Revised Total Coliform Rule

5A

Aug 31Resolved

Revised Total Coliform Rule

5A

Aug 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Public Notice

75

Jul 31Resolved

Public Notice

75

Jul 31Resolved

Public Notice

75

Jul 31Resolved

Chlorine

27

Jul 31Resolved

Chlorine

27

Jul 31Resolved

Chlorine

27

Jul 31Resolved

Arsenic

02

Jun 30Resolved

Public Notice

75

Jun 30Resolved

Public Notice

75

Jun 30Resolved

Public Notice

75

Jun 30Resolved

Revised Total Coliform Rule

4B

Jun 30Resolved

Revised Total Coliform Rule

4B

Jun 30Resolved

Revised Total Coliform Rule

4B

Apr 30Resolved

Revised Total Coliform Rule

4B

Apr 30Resolved

Groundwater Rule

45

Apr 11Resolved

Groundwater Rule

45

Apr 11Resolved

Groundwater Rule

45

Apr 11Resolved

Groundwater Rule

45

Apr 11Resolved

Public Notice

75

Apr 6Resolved

Public Notice

75

Apr 6Resolved

Public Notice

75

Apr 6Resolved

Public Notice

75

Apr 6Resolved

Total Haloacetic Acids (HAA5)

27

Mar 31Resolved

Total Haloacetic Acids (HAA5)

27

Mar 31Resolved

TTHM

27

Mar 31Resolved

TTHM

27

Mar 31Resolved

Chlorine

27

Mar 31Resolved

Chlorine

27

Mar 31Resolved

Chlorine

27

Mar 31Resolved

Arsenic

02

Mar 31Resolved

Nitrate

02

Mar 31Resolved

Nitrate

02

Mar 31Resolved

Nitrate

02

Mar 31Resolved

Nitrate

02

Mar 31Resolved

Nitrate

02

Mar 31Resolved

Nitrate

02

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

5A

Mar 31Resolved

Revised Total Coliform Rule

5A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

4B

Feb 29Resolved

Revised Total Coliform Rule

4B

Feb 29Resolved

Public Notice

75

Feb 14Resolved

Public Notice

75

Feb 14Resolved

Groundwater Rule

45

Feb 11Resolved

Groundwater Rule

45

Feb 11Resolved

Groundwater Rule

45

Feb 11Resolved

Groundwater Rule

45

Feb 11Resolved

Groundwater Rule

45

Feb 11Resolved

Groundwater Rule

45

Feb 11Resolved

Groundwater Rule

45

Feb 11Resolved

Groundwater Rule

45

Feb 11Resolved

How Does This Compare?

MARICOPA (85138) has 325 recorded violations, including 86 health-based. 15 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 →

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

NSF Certified Products → EPA Safe Drinking Water Guide →

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

NSF Certified Products → EPA Safe Drinking Water Guide →

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

Nearby ZIP Codes

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