Is Atoka Tap Water Safe? Quality Report

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

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.

546

health-based violations

592

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	2025-07-01 → 2025-09-30
MCL	Health-based	Archived	2025-07-01 → 2025-09-30
MCL	Health-based	Archived	2025-07-01 → 2025-09-30
MCL	Health-based	Archived	2025-07-01 → 2025-09-30

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
Chlorite	731.45 µg/L 73% of the EPA limit 1000 µg/L worst single sample: 996 µg/L	70/93	SYR4	2012–2019
Bromodichloromethane	15.275 µg/L No EPA limit set worst single sample: 17.2 µg/L	58/58	SYR4	2012–2019
Chloroform	100.37 µg/L No EPA limit set worst single sample: 115 µg/L	58/58	SYR4	2012–2019
Dichloroacetic Acid	29.5 µg/L No EPA limit set worst single sample: 33.6 µg/L	57/57	SYR4	2012–2019
TTHM	116.62 µg/L 146% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 134 µg/L	57/57	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	64.9 µg/L 108% of the EPA limit, at the 95th percentile of samples — 60 µg/L worst single sample: 76.7 µg/L	57/57	SYR4	2012–2019
Trichloroacetic Acid	34.72 µg/L No EPA limit set worst single sample: 43.2 µg/L	57/57	SYR4	2012–2019
Dibromochloromethane	2.8615 µg/L No EPA limit set worst single sample: 3.31 µg/L	52/58	SYR4	2012–2019
Monochloroacetic Acid	4.592 µg/L No EPA limit set worst single sample: 5.75 µg/L	25/57	SYR4	2012–2019
Copper	197 µg/L 15% of the EPA limit 1300 µg/L worst single sample: 269 µg/L	19/22	SYR4	2014–2017
Lead	0.0013 mg/L 8.7% of the EPA limit 0.0150 mg/L	13/13	LCR	2023
Nitrate-Nitrite	620 µg/L 6.2% of the EPA limit 10000 µg/L	12/16	SYR4	2012–2019
Lead	18.28 µg/L 122% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 20.8 µg/L	9/22	SYR4	2014–2017
Gross Beta Particle Activity	4.445 pCi/L No EPA limit set worst single sample: 5.11 pCi/L	8/8	SYR4	2012–2018
Gross Alpha, Excl. Radon And U	1.738 pCi/L 12% of the EPA limit 15 pCi/L worst single sample: 1.74 pCi/L	5/8	SYR4	2012–2018
Combined Radium (-226 And -228)	1.0247 pCi/L 20% of the EPA limit 5 pCi/L worst single sample: 1.07 pCi/L	4/8	SYR4	2012–2018
Dibromoacetic Acid	1.1965 µg/L No EPA limit set worst single sample: 1.21 µg/L	4/57	SYR4	2012–2019
Fluoride	1038 µg/L 26% of the EPA limit 4000 µg/L worst single sample: 1050 µg/L	3/4	SYR4	2012–2018
Monobromoacetic Acid	2.445 µg/L No EPA limit set worst single sample: 2.52 µg/L	3/57	SYR4	2012–2019
Barium	48 µg/L 2.4% of the EPA limit 2000 µg/L	1/1	SYR4	2018

33 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicBenzeneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbon TetrachlorideChromiumCombined UraniumDichloromethaneDiquatEthylbenzeneGlyphosateMercurySeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ATOKA
Phone: 580-889-3341
Email: atokawaterplant@hotmail.com

Frequently asked questions about Atoka

Is Atoka tap water safe to drink?

EPA monitoring detected 20 contaminants in Atoka'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 Atoka's water?

EPA monitoring detected Chlorite, Bromodichloromethane, Chloroform, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.

How many people does Atoka serve?

Atoka reports serving 2,988 people in Oklahoma, per its EPA record.

Has Atoka had any water quality violations?

The EPA has 592 violations on file for Atoka, of which 546 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.