Is Seminole Tap Water Safe? Quality Report

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

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

257

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2015-04-01 → 2015-04-30
MCL	Health-based	Resolved	2015-04-01 → 2015-04-30
MCL	Health-based	Resolved	2015-04-01 → 2015-04-30
MCL	Health-based	Resolved	2015-04-01 → 2015-04-30
MCL	Health-based	Resolved	2015-04-01 → 2015-04-30
MCL	Health-based	Resolved	2003-07-01 → 2003-07-31
MCL	Health-based	Resolved	2003-07-01 → 2003-07-31
MCL	Health-based	Resolved	2003-07-01 → 2003-07-31
MCL	Health-based	Resolved	2003-07-01 → 2003-07-31
MCL	Health-based	Resolved	1998-08-01 → 1998-08-31

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	94.5575 µg/L 7.3% of the EPA limit 1300 µg/L worst single sample: 128.1 µg/L	64/80	SYR4	2012–2019
Barium	157.09 µg/L 7.9% of the EPA limit 2000 µg/L worst single sample: 297 µg/L	42/42	SYR4	2012–2019
Fluoride	470 µg/L 12% of the EPA limit 4000 µg/L worst single sample: 650 µg/L	38/42	SYR4	2012–2019
Combined Radium (-226 And -228)	5.304 pCi/L 106% of the EPA limit, at the 95th percentile of samples — 5 pCi/L worst single sample: 6.45 pCi/L	37/40	SYR4	2012–2019
Gross Beta Particle Activity	9.784 pCi/L No EPA limit set worst single sample: 11.9 pCi/L	37/40	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	7.906 pCi/L 53% of the EPA limit 15 pCi/L worst single sample: 10.5 pCi/L	27/40	SYR4	2012–2019
Lead	10.082 µg/L 67% of the EPA limit 15 µg/L worst single sample: 18.15 µg/L	23/80	SYR4	2012–2019
Lead	0.0017 mg/L 11% of the EPA limit 0.0150 mg/L	15/15	LCR	2025
Nitrate-Nitrite	403 µg/L 4% of the EPA limit 10000 µg/L	10/272	SYR4	2012–2019
Lithium	25 µg/L No EPA limit set	6/33	UCMR-5	2025
Arsenic	2.16 µg/L 22% of the EPA limit 10 µg/L worst single sample: 2.2 µg/L	5/54	SYR4	2012–2019
Selenium	9.5 µg/L 19% of the EPA limit 50 µg/L worst single sample: 11 µg/L	4/42	SYR4	2012–2019
Mercury	0.1520 µg/L 7.6% of the EPA limit 2 µg/L worst single sample: 0.1600 µg/L	3/42	SYR4	2012–2019
Antimony, Total	1.1445 µg/L 19% of the EPA limit 6 µg/L worst single sample: 1.15 µg/L	2/42	SYR4	2012–2019
Bromoform	1.9005 µg/L No EPA limit set worst single sample: 1.97 µg/L	2/13	SYR4	2012–2019
Chloroform	1.118 µg/L No EPA limit set worst single sample: 1.12 µg/L	2/13	SYR4	2012–2019
TTHM	7.436 µg/L 9.3% of the EPA limit 80 µg/L worst single sample: 7.74 µg/L	2/7	SYR4	2014–2019
Bromodichloromethane	1.87 µg/L No EPA limit set	1/13	SYR4	2012–2019
Chromium	0.9000 µg/L 0.9% of the EPA limit 100 µg/L	1/42	SYR4	2012–2019
Dibromochloromethane	2.78 µg/L No EPA limit set	1/13	SYR4	2012–2019
Monochloroacetic Acid	1.38 µg/L No EPA limit set	1/7	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	1.38 µg/L 2.3% of the EPA limit 60 µg/L	1/7	SYR4	2014–2019

69 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-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAtrazineBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbon TetrachlorideCombined UraniumDichloromethaneDalaponDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEthylbenzeneGlyphosateHfpo-DaLassoMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: SEMINOLE
Phone: 405-382-4330
Email: [email protected]

Frequently asked questions about Seminole

Is Seminole tap water safe to drink?

EPA monitoring detected 22 contaminants in Seminole'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 Seminole's water?

EPA monitoring detected Copper, Barium, Fluoride, Combined Radium (-226 And -228), Gross Beta Particle Activity, and others. The full list with the level and data source for each is above.

How many people does Seminole serve?

Seminole reports serving 6,899 people in Oklahoma, per its EPA record.

Has Seminole had any water quality violations?

The EPA has 257 violations on file for Seminole, of which 11 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.