Water Quality in OAKHURST, CA (93644)

EPA violation data for public water systems serving ZIP code 93644.

Total Violations

Health-Based

Monitoring / Reporting

Resolved

What does this mean?

70 of 87 violations have been resolved. 49 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 38 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: 69 Population served: 8,622

Violations Detail (87 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Arsenic	Health-Based	N/A	0.019	Jun 30, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.019	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.019	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.019	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.018	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 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	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	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	Active	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 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	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	Active	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 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	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	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	Active	N/A
Arsenic	Health-Based	N/A	0.019	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Arsenic	Health-Based	N/A	0.018	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Combined Uranium	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Combined Uranium	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.019	Jun 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.018	Jun 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.018	Mar 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	17.5	Mar 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.019	Dec 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.017875	Dec 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
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
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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.01775	Sep 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.016875	Jun 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	17.125	Mar 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
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
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
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
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
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
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	17.5	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	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Combined Uranium	Health-Based	N/A	34.05	Dec 31, 2022	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
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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.0167	Sep 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.019	Sep 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Combined Uranium	Health-Based	N/A	20.5	Jun 30, 2022	Resolved	N/A
Combined Uranium	Health-Based	N/A	20.5	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.0161	Jun 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.019	Jun 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Combined Uranium	Health-Based	N/A	26	Mar 31, 2022	Resolved	N/A
Combined Uranium	Health-Based	N/A	26	Mar 31, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.0172	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.019	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Combined Uranium	Health-Based	N/A	26	Dec 31, 2021	Resolved	N/A
Combined Uranium	Health-Based	N/A	26	Dec 31, 2021	Resolved	N/A
Arsenic	Health-Based	N/A	0.0173	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.019	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Nitrate	Monitoring	N/A	N/A	Dec 31, 2021	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, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Combined Uranium	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Combined Uranium	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Combined Uranium	Health-Based	N/A	40	Dec 31, 2021	Resolved	N/A
Combined Uranium	Health-Based	N/A	26	Sep 30, 2021	Resolved	N/A
Combined Uranium	Health-Based	N/A	26	Sep 30, 2021	Resolved	N/A
Arsenic	Health-Based	N/A	0.01975	Sep 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.019	Sep 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.021975	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.01875	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0220525	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0185	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer

Lead & Copper Levels

Violation Timeline

2025(3)

Arsenic

Jun 30Resolved

Arsenic

Mar 31Resolved

Arsenic

Mar 31Resolved

2024(27)

Arsenic

Dec 31Resolved

Arsenic

Dec 31Resolved