Water Quality in Second Mesa, AZ (86043)

EPA violation data for public water systems serving ZIP code 86043.

143

Total Violations

Health-Based

100

Monitoring / Reporting

130

Resolved

What does this mean?

130 of 143 violations have been resolved. 43 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 100 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: 5 Population served: 3,986

Violations Detail (143 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Arsenic	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Fluoride	Health-Based	N/A	4.9	Jun 30, 2025	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Chlorine	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Eye and nose irritation; stomach discomfort
Fluoride	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Arsenic	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 31, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Fluoride	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Chlorine	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Arsenic	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Public Notice	Monitoring	N/A	N/A	Dec 31, 2024	Active	N/A
Public Notice	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.0102	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0102	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0102	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Nov 15, 2024	Active	N/A
LEAD AND COPPER RULE REVISIONS	Health-Based	N/A	N/A	Oct 16, 2024	Active	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Resolved	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Resolved	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Resolved	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Resolved	N/A
LEAD AND COPPER RULE REVISIONS	Health-Based	N/A	N/A	Oct 16, 2024	Active	N/A
Fluoride	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Arsenic	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Fluoride	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Arsenic	Health-Based	N/A	0.0112	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0112	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0112	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0109	Jun 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	May 31, 2024	Resolved	N/A
Fluoride	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Arsenic	Health-Based	N/A	0.0104	Mar 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Public Notice	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Nitrate	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Arsenic	Health-Based	N/A	0.014	Sep 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	Eye and nose irritation; stomach discomfort
Fluoride	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2023	Resolved	N/A
Arsenic	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0145	Jun 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0145	Jun 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	Eye and nose irritation; stomach discomfort
Fluoride	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jun 30, 2023	Active	N/A
Public Notice	Monitoring	N/A	N/A	Jun 30, 2023	Active	N/A
Arsenic	Health-Based	N/A	0.014	Jun 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.0143	Mar 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Fluoride	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Arsenic	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Feb 28, 2023	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2023	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Arsenic	Health-Based	N/A	0.0143	Dec 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0143	Dec 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2022	Active	N/A
Nitrate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
TTHM	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Fluoride	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Arsenic	Health-Based	N/A	0.0145	Sep 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0145	Sep 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Fluoride	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
E. COLI	Monitoring	0	N/A	Jul 31, 2022	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
Chlorine	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	Eye and nose irritation; stomach discomfort
Arsenic	Health-Based	N/A	0.0145	Jun 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0145	Jun 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
E. COLI	Monitoring	0	N/A	Jun 30, 2022	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
Chlorine	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	Eye and nose irritation; stomach discomfort
Arsenic	Health-Based	N/A	0.0165	Jun 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2022	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.015	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.015	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Fluoride	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Arsenic	Health-Based	N/A	0.0175	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0175	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Arsenic	Health-Based	N/A	0.0145	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0145	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2021	Active	N/A
Chlorine	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Eye and nose irritation; stomach discomfort
Fluoride	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Arsenic	Health-Based	N/A	0.0178	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0178	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2021	Resolved	N/A
Arsenic	Health-Based	N/A	0.0145	Sep 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0145	Sep 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Arsenic	Health-Based	N/A	0.018	Sep 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.018	Sep 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Arsenic	Health-Based	N/A	0.0145	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0145	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Arsenic	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Fluoride	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Arsenic	Health-Based	N/A	0.018	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.018	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Arsenic	Health-Based	N/A	0.0143	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0143	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Eye and nose irritation; stomach discomfort
Fluoride	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Arsenic	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Eye and nose irritation; stomach discomfort
Arsenic	Health-Based	N/A	0.0172	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0172	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Chlorine	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Eye and nose irritation; stomach discomfort

Lead & Copper Levels

Violation Timeline

2025(13)

Revised Total Coliform Rule

Jul 31Resolved

Arsenic

Jun 30Resolved

Arsenic

Jun 30Resolved

Fluoride

Jun 30Resolved

Chlorine

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Chlorine

Jun 30Resolved

Fluoride

Mar 31Resolved

Arsenic

Mar 31Resolved

Arsenic

Mar 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Public Notice

Jan 31Active

Revised Total Coliform Rule

Jan 31Resolved

2024(33)

Fluoride

Dec 31Resolved

Chlorine

Dec 31Resolved

Arsenic

Dec 31Resolved

Public Notice

Dec 31Active

Public Notice

Dec 31Resolved

Public Notice

Dec 31Resolved

Public Notice

Dec 31Resolved

Arsenic

Dec 31Resolved

Arsenic

Dec 31Resolved

Arsenic

Dec 31Resolved