Water Quality in MADERA, CA (93637)

EPA violation data for public water systems serving ZIP code 93637.

295

Total Violations

158

Health-Based

137

Monitoring / Reporting

291

Resolved

What does this mean?

291 of 295 violations have been resolved. 158 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 137 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: 83 Population served: 88,807

Violations Detail (295 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Jul 1, 2025	Active	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Jul 1, 2025	Active	N/A
Arsenic	Health-Based	N/A	0.011	Jun 30, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.0965	Jun 30, 2025	Resolved	N/A
TTHM	Health-Based	N/A	0.14	Jun 30, 2025	Resolved	N/A
Arsenic	Health-Based	N/A	0.0141	Jun 30, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.063	Jun 30, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.14	Jun 30, 2025	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.14	Jun 30, 2025	Resolved	N/A
TTHM	Health-Based	N/A	0.1052	Jun 30, 2025	Resolved	N/A
Arsenic	Health-Based	N/A	0.012	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
TTHM	Health-Based	N/A	0.0962	Mar 31, 2025	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.1425	Mar 31, 2025	Resolved	N/A
Arsenic	Health-Based	N/A	0.015	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.059	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.128	Mar 31, 2025	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.128	Mar 31, 2025	Resolved	N/A
TTHM	Health-Based	N/A	0.103	Mar 31, 2025	Resolved	N/A
TTHM	Health-Based	N/A	0.103	Mar 31, 2025	Resolved	N/A
Arsenic	Health-Based	N/A	0.014	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.018	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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Arsenic	Health-Based	N/A	0.012	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.0817	Dec 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.1175	Dec 31, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.034	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2024	Active	N/A
TTHM	Health-Based	N/A	0.106	Dec 31, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.134	Dec 31, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.134	Dec 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.106	Dec 31, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.015	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.015	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Combined Uranium	Health-Based	N/A	56.2	Oct 30, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.0122	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
TTHM	Health-Based	N/A	0.1125	Sep 30, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.09875	Sep 30, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	53	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.1078	Sep 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.0835	Sep 30, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.019	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
1,2-DIBROMO-3-CHLOROPROPANE	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.0124	Jun 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.117	Jun 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.132	Jun 30, 2024	Resolved	N/A
Arsenic	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2024	Active	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.102	Jun 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.089	Jun 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.089	Jun 30, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.102	Jun 30, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.0195	Jun 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Combined Uranium	Health-Based	N/A	57.5	Jun 30, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.013	Mar 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
TTHM	Health-Based	N/A	0.123	Mar 31, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.095	Mar 31, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.017	Mar 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.102	Mar 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.102	Mar 31, 2024	Resolved	N/A
Combined Uranium	Health-Based	N/A	39.85	Mar 31, 2024	Resolved	N/A
Arsenic	Health-Based	N/A	0.017	Mar 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
1,2-Dichloropropane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
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
Vinyl chloride	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Increased risk of cancer
Vinyl chloride	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Liver problems; increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Liver problems; increased risk of cancer
Benzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
Benzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Anemia; decrease in blood platelets; 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
Carbon tetrachloride	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Liver problems; increased risk of cancer
Carbon tetrachloride	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Liver problems; increased risk of cancer
Trichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Liver problems; increased risk of cancer
Trichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Liver problems; increased risk of cancer
Ethylbenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,2-Dichloropropane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Xylenes, Total	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Xylenes, Total	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
CHLOROBENZENE	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
CHLOROBENZENE	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.0125	Dec 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.13	Dec 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.135	Dec 31, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	40.8	Dec 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.115	Dec 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.112	Dec 31, 2023	Resolved	N/A
Combined Uranium	Health-Based	N/A	44	Dec 31, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.02	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
Arsenic	Health-Based	N/A	0.01375	Sep 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
TTHM	Health-Based	N/A	0.155	Sep 30, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.111	Sep 30, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.035875	Sep 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
TTHM	Health-Based	N/A	0.121	Sep 30, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.115	Sep 30, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.02	Sep 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Combined Uranium	Health-Based	N/A	44.5	Sep 30, 2023	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.01425	Jun 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.109	Jun 30, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.144	Jun 30, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.0225	Jun 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.098	Jun 30, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.113	Jun 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.02	Jun 30, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Combined Uranium	Health-Based	N/A	44.5	Jun 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	May 31, 2023	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	May 31, 2023	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Apr 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Apr 30, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.01425	Mar 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Surface Water Treatment Rule	Health-Based	N/A	N/A	Mar 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.149	Mar 31, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.101	Mar 31, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.02	Mar 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0206	Mar 31, 2023	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Combined Uranium	Health-Based	N/A	40	Mar 31, 2023	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.813	Mar 31, 2023	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.813	Mar 31, 2023	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2023	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2023	Resolved	N/A
Arsenic	Health-Based	N/A	0.014	Dec 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Nitrate	Health-Based	N/A	15	Dec 31, 2022	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	15	Dec 31, 2022	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
TTHM	Health-Based	N/A	0.22	Dec 31, 2022	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.15	Dec 31, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.012	Dec 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.15	Dec 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.13	Dec 31, 2022	Resolved	N/A
Combined Uranium	Health-Based	N/A	42.5	Dec 31, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.022	Dec 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.3115	Dec 31, 2022	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.3115	Dec 31, 2022	Resolved	N/A
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
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	0.01375	Sep 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.093	Sep 30, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.12	Sep 30, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.014	Sep 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	0.0735	Sep 30, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.0218	Sep 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0168	Sep 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.0003165	Sep 30, 2022	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.0003165	Sep 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.0135	Jun 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	93.3	Jun 30, 2022	Resolved	N/A
TTHM	Health-Based	N/A	123	Jun 30, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.0208	Jun 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.01203	Jun 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	74.5	Jun 30, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.0182	Jun 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0163	Jun 30, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.49	Jun 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.013	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
TTHM	Health-Based	N/A	140	Mar 31, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.01053	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0243	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)	Health-Based	N/A	68.8	Mar 31, 2022	Resolved	N/A
Arsenic	Health-Based	N/A	0.0186	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0158	Mar 31, 2022	Resolved	Skin damage; circulatory system problems; increased risk of cancer
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.46	Mar 31, 2022	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.46	Mar 31, 2022	Resolved	N/A
Antimony, Total	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Beryllium, Total	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Thallium, Total	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Thallium, Total	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Barium	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Increase in blood pressure
Barium	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Increase in blood pressure
Nickel	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Antimony, Total	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Selenium	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Hair or fingernail loss; numbness in fingers or toes; circulatory problems
Nitrite	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
Nitrite	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
Fluoride	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Fluoride	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Chromium	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Allergic dermatitis
Nitrite	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
Nitrite	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
Chromium	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Allergic dermatitis
Cadmium	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Kidney damage
Cadmium	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Kidney damage
Arsenic	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Selenium	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Hair or fingernail loss; numbness in fingers or toes; circulatory problems
Beryllium, Total	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Mercury	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Kidney damage
Mercury	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Kidney damage
Arsenic	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Nickel	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Arsenic	Health-Based	N/A	0.0135	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
Arsenic	Health-Based	N/A	0.01003	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0295	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Atrazine	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Cardiovascular system or reproductive problems
Simazine	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Arsenic	Health-Based	N/A	0.0187	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0158	Dec 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Combined Uranium	Health-Based	N/A	44.25	Dec 31, 2021	Resolved	N/A
Total Polychlorinated Biphenyls (PCB)	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Diquat	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
2,3,7,8-TCDD	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
ETHYLENE DIBROMIDE	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Nitrite	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
Methoxychlor	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Glyphosate	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Endothall	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Cardiovascular system or reproductive problems
BHC-GAMMA	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Nitrite	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
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
Arsenic	Health-Based	N/A	0.013	Sep 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0343	Sep 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0102	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
Arsenic	Health-Based	N/A	0.016	Sep 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.01325	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
TTHM	Health-Based	N/A	160	Jun 30, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	100	Jun 30, 2021	Resolved	N/A
Arsenic	Health-Based	N/A	0.0348	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.01023	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.013	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
TTHM	Health-Based	N/A	100	Mar 31, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Health-Based	N/A	71.5	Mar 31, 2021	Resolved	N/A
Arsenic	Health-Based	N/A	0.0323	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.01073	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0215	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.016	Mar 31, 2021	Resolved	Skin damage; circulatory system problems; increased risk of cancer
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.000229	Mar 31, 2021	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Health-Based	N/A	0.000229	Mar 31, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(27)

LEAD AND COPPER RULE REVISIONS

Jul 1Active

LEAD AND COPPER RULE REVISIONS

Jul 1Active

Arsenic

Jun 30Resolved

Total Haloacetic Acids (HAA5)

Jun 30Resolved

TTHM

Jun 30Resolved

Arsenic

Jun 30Resolved

Arsenic

Jun 30Resolved

Total Haloacetic Acids (HAA5)

Jun 30Resolved

Total Haloacetic Acids (HAA5)

Jun 30Resolved

TTHM

Jun 30Resolved

Arsenic

Mar 31Resolved

TTHM

Mar 31Resolved

Total Haloacetic Acids (HAA5)

Mar 31Resolved

Arsenic

Mar 31Resolved

Arsenic

Mar 31Resolved

Total Haloacetic Acids (HAA5)

Mar 31Resolved

Total Haloacetic Acids (HAA5)

Mar 31Resolved

TTHM

Mar 31Resolved

TTHM

Mar 31Resolved

Arsenic

Mar 31Resolved

Arsenic

Mar 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

2024(40)

Arsenic

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

TTHM

Dec 31Resolved

Arsenic

Dec 31Resolved

Lead and Copper Rule

Dec 31Active

TTHM

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

TTHM

Dec 31Resolved

Arsenic

Dec 31Resolved

Arsenic

Dec 31Resolved

Combined Uranium

Oct 30Resolved

Arsenic

Sep 30Resolved

Arsenic

Sep 30Resolved

TTHM

Sep 30Resolved

Total Haloacetic Acids (HAA5)

Sep 30Resolved

Arsenic

Sep 30Resolved

Total Haloacetic Acids (HAA5)

Sep 30Resolved

TTHM

Sep 30Resolved

Arsenic

Sep 30Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Sep 30Resolved

Arsenic

Jun 30Resolved

Total Haloacetic Acids (HAA5)

Jun 30Resolved

TTHM

Jun 30Resolved

Arsenic

Jun 30Resolved

Lead and Copper Rule

Jun 30Active

Total Haloacetic Acids (HAA5)

Jun 30Resolved

TTHM

Jun 30Resolved

TTHM

Jun 30Resolved

Total Haloacetic Acids (HAA5)

Jun 30Resolved

Arsenic

Jun 30Resolved

Combined Uranium

Jun 30Resolved

Arsenic

Mar 31Resolved

TTHM

Mar 31Resolved

Total Haloacetic Acids (HAA5)

Mar 31Resolved

Arsenic

Mar 31Resolved

Total Haloacetic Acids (HAA5)

Mar 31Resolved

TTHM

Mar 31Resolved

Combined Uranium

Mar 31Resolved

Arsenic

Mar 31Resolved

2023(89)

1,2-Dichloropropane

Dec 31Resolved

DICHLOROMETHANE

Dec 31Resolved

trans-1,2-Dichloroethylene

Dec 31Resolved

Nitrate

Dec 31Resolved

Vinyl chloride

Dec 31Resolved

Vinyl chloride

Dec 31Resolved

Tetrachloroethylene

Dec 31Resolved

Tetrachloroethylene

Dec 31Resolved

Benzene

Dec 31Resolved

Benzene

Dec 31Resolved

Nitrate

Dec 31Resolved

Carbon tetrachloride

Dec 31Resolved

Carbon tetrachloride

Dec 31Resolved

Trichloroethylene

Dec 31Resolved

Trichloroethylene

Dec 31Resolved

Ethylbenzene

Dec 31Resolved

Ethylbenzene

Dec 31Resolved

trans-1,2-Dichloroethylene

Dec 31Resolved

1,2-Dichloropropane

Dec 31Resolved

Styrene

Dec 31Resolved

1,2,4-Trichlorobenzene

Dec 31Resolved

1,2,4-Trichlorobenzene

Dec 31Resolved

cis-1,2-Dichloroethylene

Dec 31Resolved

cis-1,2-Dichloroethylene

Dec 31Resolved

Xylenes, Total

Dec 31Resolved

Xylenes, Total

Dec 31Resolved

o-Dichlorobenzene

Dec 31Resolved

o-Dichlorobenzene

Dec 31Resolved

p-Dichlorobenzene

Dec 31Resolved

p-Dichlorobenzene

Dec 31Resolved

1,1-Dichloroethylene

Dec 31Resolved

1,1-Dichloroethylene

Dec 31Resolved

1,2-Dichloroethane

Dec 31Resolved

1,2-Dichloroethane

Dec 31Resolved

1,1,1-Trichloroethane

Dec 31Resolved

1,1,1-Trichloroethane

Dec 31Resolved

1,1,2-Trichloroethane

Dec 31Resolved

1,1,2-Trichloroethane

Dec 31Resolved

CHLOROBENZENE

Dec 31Resolved

CHLOROBENZENE

Dec 31Resolved

Toluene

Dec 31Resolved

Toluene

Dec 31Resolved

DICHLOROMETHANE

Dec 31Resolved

Styrene

Dec 31Resolved

Arsenic

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

TTHM

Dec 31Resolved

Arsenic

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

TTHM

Dec 31Resolved

Combined Uranium

Dec 31Resolved

Arsenic

Dec 31Resolved

Nitrate

Dec 31Resolved

Nitrate

Dec 31Resolved

Arsenic

Sep 30Resolved

TTHM

Sep 30Resolved

Total Haloacetic Acids (HAA5)

Sep 30Resolved

Arsenic

Sep 30Resolved

TTHM

Sep 30Resolved

Total Haloacetic Acids (HAA5)

Sep 30Resolved

Arsenic

Sep 30Resolved

Combined Uranium

Sep 30Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Sep 30Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Sep 30Resolved

Arsenic

Jun 30Resolved

Total Haloacetic Acids (HAA5)

Jun 30Resolved

TTHM

Jun 30Resolved

Arsenic

Jun 30Resolved

Total Haloacetic Acids (HAA5)

Jun 30Resolved

TTHM

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Resolved

Arsenic

Jun 30Resolved

Combined Uranium

Jun 30Resolved

Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

Apr 30Resolved

Surface Water Treatment Rule

Apr 30Resolved

Arsenic

Mar 31Resolved

Surface Water Treatment Rule

Mar 31Resolved

TTHM

Mar 31Resolved

Total Haloacetic Acids (HAA5)

Mar 31Resolved

Arsenic

Mar 31Resolved

Arsenic

Mar 31Resolved

Combined Uranium

Mar 31Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Mar 31Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Mar 31Resolved

Surface Water Treatment Rule

Feb 28Resolved

Surface Water Treatment Rule

Feb 28Resolved

2021(92)

Antimony, Total

Dec 31Resolved

Beryllium, Total

Dec 31Resolved

Thallium, Total

Dec 31Resolved

Thallium, Total

Dec 31Resolved

Barium

Dec 31Resolved

Barium

Dec 31Resolved

Nickel

Dec 31Resolved

Antimony, Total

Dec 31Resolved

Selenium

Dec 31Resolved

Nitrite

Dec 31Resolved

Nitrite

Dec 31Resolved

Fluoride

Dec 31Resolved

Fluoride

Dec 31Resolved

Chromium

Dec 31Resolved

Nitrite

Dec 31Resolved

Nitrite

Dec 31Resolved

Chromium

Dec 31Resolved

Cadmium

Dec 31Resolved

Cadmium

Dec 31Resolved

Arsenic

Dec 31Resolved

Selenium

Dec 31Resolved

Beryllium, Total

Dec 31Resolved

Mercury

Dec 31Resolved

Mercury

Dec 31Resolved

Arsenic

Dec 31Resolved

Nickel

Dec 31Resolved

Arsenic

Dec 31Resolved

Nitrate

Dec 31Resolved

Nitrate

Dec 31Resolved

Arsenic

Dec 31Resolved

Arsenic

Dec 31Resolved

Atrazine

Dec 31Resolved

Simazine

Dec 31Resolved

LASSO

Dec 31Resolved

Arsenic

Dec 31Resolved

Arsenic

Dec 31Resolved

Combined Uranium

Dec 31Resolved

Total Polychlorinated Biphenyls (PCB)

Dec 31Resolved

Toxaphene

Dec 31Resolved

Dalapon

Dec 31Resolved

Diquat

Dec 31Resolved

Di(2-ethylhexyl) adipate

Dec 31Resolved

OXAMYL

Dec 31Resolved

Simazine

Dec 31Resolved

Di(2-ethylhexyl) phthalate

Dec 31Resolved

Picloram

Dec 31Resolved

Dinoseb

Dec 31Resolved

Hexachlorocyclopentadiene

Dec 31Resolved

LASSO

Dec 31Resolved

2,3,7,8-TCDD

Dec 31Resolved

Heptachlor

Dec 31Resolved

2,4,5-TP

Dec 31Resolved

Benzo(a)pyrene

Dec 31Resolved

Pentachlorophenol

Dec 31Resolved

ETHYLENE DIBROMIDE

Dec 31Resolved

Chlordane

Dec 31Resolved

Nitrite

Dec 31Resolved

Methoxychlor

Dec 31Resolved

Heptachlor epoxide

Dec 31Resolved

Glyphosate

Dec 31Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Dec 31Resolved

Endothall

Dec 31Resolved

2,4-D

Dec 31Resolved

Endrin

Dec 31Resolved

Atrazine

Dec 31Resolved

BHC-GAMMA

Dec 31Resolved

Carbofuran

Dec 31Resolved

HEXACHLOROBENZENE

Dec 31Resolved

Nitrite

Dec 31Resolved

Nitrate

Dec 31Resolved

Nitrate

Dec 31Resolved

Arsenic

Sep 30Resolved

Arsenic

Sep 30Resolved

Arsenic

Sep 30Resolved

Arsenic

Sep 30Resolved

Arsenic

Sep 30Resolved

Arsenic

Jun 30Resolved

TTHM

Jun 30Resolved

Total Haloacetic Acids (HAA5)

Jun 30Resolved

Arsenic

Jun 30Resolved

Arsenic

Jun 30Resolved

Arsenic

Jun 30Resolved

Arsenic

Jun 30Resolved

Arsenic

Mar 31Resolved

TTHM

Mar 31Resolved

Total Haloacetic Acids (HAA5)

Mar 31Resolved

Arsenic

Mar 31Resolved

Arsenic

Mar 31Resolved

Arsenic

Mar 31Resolved

Arsenic

Mar 31Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Mar 31Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Mar 31Resolved

How Does This Compare?

MADERA (93637) has 295 recorded violations, including 158 health-based. 4 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.

Water Quality in MADERA, CA (93637)

What does this mean?

Violations Detail (295 total)

Lead & Copper Levels

Violation Timeline

2025(27)

2024(40)

2023(89)

2022(47)

2021(92)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

Activated Carbon Filter

UV Water Purifier

Nearby ZIP Codes

Check Another ZIP Code