Is City of Madera Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Madera

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	1995-09-01 → 1995-09-30
MCL	Health-based	Resolved	1995-09-01 → 1995-09-30
MCL	Health-based	Resolved	1995-06-01 → 1995-06-30
MCL	Health-based	Resolved	1995-06-01 → 1995-06-30
MCL	Health-based	Resolved	1994-06-01 → 1994-06-30
MCL	Health-based	Resolved	1994-06-01 → 1994-06-30
MCL	Health-based	Resolved	1994-03-01 → 1994-03-31
MCL	Health-based	Resolved	1994-03-01 → 1994-03-31
MCL	Health-based	Resolved	1993-11-01 → 1993-11-30
MCL	Health-based	Resolved	1993-11-01 → 1993-11-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	2959.7 µg/L 30% of the EPA limit 10000 µg/L worst single sample: 5424 µg/L	314/316	SYR4	2012–2019
Fluoride	181 µg/L 4.5% of the EPA limit 4000 µg/L worst single sample: 610 µg/L	59/67	SYR4	2012–2019
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L	37/37	LCR	2025
1,2-DIBROMO-3-CHLOROPROPANE	0.1300 µg/L 65% of the EPA limit 0.2000 µg/L worst single sample: 0.1400 µg/L	31/92	SYR4	2012–2019
Arsenic	8.9 µg/L 89% of the EPA limit 10 µg/L worst single sample: 9.4 µg/L	27/72	SYR4	2012–2019
Nitrate-Nitrite	2700 µg/L 27% of the EPA limit 10000 µg/L worst single sample: 4700 µg/L	21/21	SYR4	2017–2019
Tetrachloroethylene	3.02 µg/L 60% of the EPA limit 5 µg/L worst single sample: 3.2 µg/L	19/74	SYR4	2012–2019
TTHM	0.8410 µg/L 1.1% of the EPA limit 80 µg/L worst single sample: 0.9100 µg/L	7/13	SYR4	2014–2019
Barium	177 µg/L 8.9% of the EPA limit 2000 µg/L worst single sample: 180 µg/L	4/61	SYR4	2012–2019
Combined Uranium	13.2908 µg/L 44% of the EPA limit 30 µg/L worst single sample: 13.559 µg/L	2/2	SYR4	2016–2019

81 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidEthylene DibromideEthylbenzeneGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHexachlorocyclopentadieneLassoLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaSeleniumSimazineStyreneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: BOTWRIGHT, JOHN
Phone: 559-661-5466
Email: jbotwright@cityofmadera.com

Frequently asked questions about City of Madera

Is City of Madera tap water safe to drink?

EPA monitoring detected 10 contaminants in City of Madera's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in City of Madera's water?

EPA monitoring detected Nitrate, Fluoride, Lead, 1,2-DIBROMO-3-CHLOROPROPANE, Arsenic, and others. The full list with the level and data source for each is above.

How many people does City of Madera serve?

City of Madera reports serving 66,560 people in California, per its EPA record.

Has City of Madera had any water quality violations?

The EPA has 18 violations on file for City of Madera, of which 14 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.