Is Choctaw Ua Tap Water Safe? Quality Report

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

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

306

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2003-09-01 → 2003-09-30
MCL	Health-based	Resolved	2003-09-01 → 2003-09-30
MCL	Health-based	Resolved	2003-09-01 → 2003-09-30
MCL	Health-based	Resolved	2003-09-01 → 2003-09-30
MCL	Health-based	Resolved	1992-08-01 → 1992-08-31
MR	Monitoring	Archived	2025-10-01 → 2025-12-31
MR	Monitoring	Archived	2025-10-01 → 2025-12-31
MR	Monitoring	Archived	2025-10-01 → 2025-12-31
MR	Monitoring	Archived	2025-10-01 → 2025-12-31
MR	Monitoring	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
Copper	104.17 µg/L 8% of the EPA limit 1300 µg/L worst single sample: 150.5 µg/L	143/150	SYR4	2012–2019
Nitrate-Nitrite	890 µg/L 8.9% of the EPA limit 10000 µg/L worst single sample: 5750 µg/L	82/90	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	14.1485 pCi/L 94% of the EPA limit 15 pCi/L worst single sample: 16.31 pCi/L	22/22	SYR4	2012–2019
Combined Uranium	7.58 µg/L 25% of the EPA limit 30 µg/L worst single sample: 8.3 µg/L	19/22	SYR4	2012–2019
Barium	501.2 µg/L 25% of the EPA limit 2000 µg/L worst single sample: 510 µg/L	17/17	SYR4	2012–2018
Lead	0.0114 mg/L 76% of the EPA limit 0.0150 mg/L	16/16	LCR	2025
Gross Beta Particle Activity	6.4363 pCi/L No EPA limit set worst single sample: 7.852 pCi/L	14/22	SYR4	2012–2019
Chromium	20.17 µg/L 20% of the EPA limit 100 µg/L worst single sample: 20.5 µg/L	12/17	SYR4	2012–2018
Combined Radium (-226 And -228)	1.4155 pCi/L 28% of the EPA limit 5 pCi/L worst single sample: 1.42 pCi/L	10/22	SYR4	2012–2019
Fluoride	371 µg/L 9.3% of the EPA limit 4000 µg/L worst single sample: 380 µg/L	7/17	SYR4	2012–2018
Lithium	18.1 µg/L No EPA limit set	6/10	UCMR-5	2024
Arsenic	2.9 µg/L 29% of the EPA limit 10 µg/L	5/23	SYR4	2012–2019
Dibromochloromethane	1.385 µg/L No EPA limit set worst single sample: 1.4 µg/L	2/16	SYR4	2012–2019
TTHM	4.425 µg/L 5.5% of the EPA limit 80 µg/L worst single sample: 4.6 µg/L	2/7	SYR4	2014–2019
Bromodichloromethane	1.7 µg/L No EPA limit set	1/16	SYR4	2012–2019
Chloroform	1.5 µg/L No EPA limit set	1/16	SYR4	2012–2019

93 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-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Choctaw Ua

Is Choctaw Ua tap water safe to drink?

EPA monitoring detected 16 contaminants in Choctaw Ua'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 Choctaw Ua's water?

EPA monitoring detected Copper, Nitrate-Nitrite, Gross Alpha, Excl. Radon And U, Combined Uranium, Barium, and others. The full list with the level and data source for each is above.

How many people does Choctaw Ua serve?

Choctaw Ua reports serving 3,926 people, per its EPA record.

Has Choctaw Ua had any water quality violations?

The EPA has 306 violations on file for Choctaw Ua, of which 5 are health-based (a contaminant limit or required treatment was breached) and 5 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.