Is Madill Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Marshall

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.

310

health-based violations

427

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31

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
Fluoride	1052.5 µg/L 26% of the EPA limit 4000 µg/L worst single sample: 1120 µg/L	96/96	SYR4	2012–2019
TTHM	109 µg/L 136% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 111 µg/L	61/61	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	71.2 µg/L 119% of the EPA limit, at the 95th percentile of samples — 60 µg/L worst single sample: 78.5 µg/L	61/61	SYR4	2012–2019
Bromodichloromethane	22.28 µg/L No EPA limit set worst single sample: 26.2 µg/L	57/57	SYR4	2012–2019
Chloroform	83.46 µg/L No EPA limit set worst single sample: 90.2 µg/L	57/57	SYR4	2012–2019
Dibromochloromethane	5.656 µg/L No EPA limit set worst single sample: 6.49 µg/L	57/57	SYR4	2012–2019
Dichloroacetic Acid	32.23 µg/L No EPA limit set worst single sample: 36.1 µg/L	55/55	SYR4	2012–2019
Trichloroacetic Acid	38.21 µg/L No EPA limit set worst single sample: 43.4 µg/L	55/55	SYR4	2012–2019
Copper	295.2 µg/L 23% of the EPA limit 1300 µg/L worst single sample: 352 µg/L	30/40	SYR4	2014–2017
Monochloroacetic Acid	7.911 µg/L No EPA limit set worst single sample: 8.2 µg/L	18/55	SYR4	2012–2019
Lead	0.0017 mg/L 11% of the EPA limit 0.0150 mg/L	13/13	LCR	2023
Dibromoacetic Acid	1.3295 µg/L No EPA limit set worst single sample: 1.34 µg/L	4/55	SYR4	2012–2019
Combined Radium (-226 And -228)	0.7169 pCi/L 14% of the EPA limit 5 pCi/L worst single sample: 0.7210 pCi/L	3/3	SYR4	2013–2019
Gross Beta Particle Activity	3.861 pCi/L No EPA limit set worst single sample: 4 pCi/L	3/3	SYR4	2013–2019
Monobromoacetic Acid	1.694 µg/L No EPA limit set worst single sample: 1.73 µg/L	3/55	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	1.06 pCi/L 7.1% of the EPA limit 15 pCi/L	1/3	SYR4	2013–2019
Lead	11 µg/L 73% of the EPA limit 15 µg/L	1/40	SYR4	2014–2017
Nitrate-Nitrite	290 µg/L 2.9% of the EPA limit 10000 µg/L	1/8	SYR4	2012–2019

85 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBromoformChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNetfosaaNfdhaNmefosaaNitrateNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MADILL
Phone: 580-795-2361
Email: [email protected]

Frequently asked questions about Madill

Is Madill tap water safe to drink?

EPA monitoring detected 18 contaminants in Madill'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 Madill's water?

EPA monitoring detected Fluoride, TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane, Chloroform, and others. The full list with the level and data source for each is above.

How many people does Madill serve?

Madill reports serving 3,410 people in Oklahoma, per its EPA record.

Has Madill had any water quality violations?

The EPA has 427 violations on file for Madill, of which 310 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.