Water Quality in COTTONWOOD, AZ (86326)

EPA violation data for public water systems serving ZIP code 86326.

336

Total Violations

69

Health-Based

267

Monitoring / Reporting

326

Resolved

What does this mean?

326 of 336 violations have been resolved. 69 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 267 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: 34 Population served: 29,137

Violations Detail (336 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Public NoticeMonitoringN/AN/AMay 9, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AMay 9, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AMay 1, 2025ActiveN/A
NitrateMonitoringN/AN/AMar 31, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateMonitoringN/AN/AMar 31, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateMonitoringN/AN/AMar 31, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateMonitoringN/AN/AMar 31, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Lead and Copper RuleMonitoringN/AN/ADec 31, 2024ResolvedN/A
Lead and Copper RuleMonitoringN/AN/ADec 31, 2024ResolvedN/A
NitrateMonitoringN/AN/ADec 31, 2024ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath

Lead & Copper Levels

Violation Timeline

2025(7)

Public Notice

75

May 9Resolved

Public Notice

75

May 9Resolved

Public Notice

75

May 1Active

Nitrate

03

Mar 31Resolved

Nitrate

03

Mar 31Resolved

Nitrate

03

Mar 31Resolved

Nitrate

03

Mar 31Resolved

2024(60)

Lead and Copper Rule

66

Dec 31Resolved

Lead and Copper Rule

66

Dec 31Resolved

Nitrate

03

Dec 31Resolved

Nitrate

03

Dec 31Resolved

Nitrate

03

Dec 31Resolved

Public Notice

75

Dec 19Active

Public Notice

75

Dec 19Active

Public Notice

75

Dec 19Active

Public Notice

75

Dec 4Resolved

Public Notice

75

Dec 4Resolved

Public Notice

75

Dec 4Resolved

Public Notice

75

Dec 4Resolved

Public Notice

75

Oct 25Resolved

Public Notice

75

Oct 25Resolved

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

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

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

Arsenic

03

Sep 30Resolved

Arsenic

03

Sep 30Resolved

Revised Total Coliform Rule

2B

Sep 8Resolved

Revised Total Coliform Rule

2B

Sep 8Resolved

Revised Total Coliform Rule

2B

Sep 8Resolved

Revised Total Coliform Rule

2B

Sep 8Resolved

Revised Total Coliform Rule

2B

Aug 10Active

Revised Total Coliform Rule

2B

Aug 10Active

Revised Total Coliform Rule

2B

Aug 10Active

Nitrate

03

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Revised Total Coliform Rule

4B

May 31Resolved

Revised Total Coliform Rule

4B

May 31Resolved

Public Notice

75

May 25Resolved

Public Notice

75

May 25Resolved

Public Notice

75

Apr 26Resolved

Public Notice

75

Apr 26Resolved

Arsenic

03

Mar 31Resolved

Arsenic

03

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Public Notice

75

Mar 30Resolved

Public Notice

75

Mar 30Resolved

Public Notice

75

Feb 8Resolved

Public Notice

75

Feb 8Resolved

How Does This Compare?

COTTONWOOD (86326) has 336 recorded violations, including 69 health-based. 10 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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