Is Guymon Tap Water Safe? Quality Report

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

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	2025-01-01 → 2025-12-31
MCL	Health-based	Resolved	2025-01-01 → 2025-12-31
MCL	Health-based	Resolved	2025-01-01 → 2025-12-31
MCL	Health-based	Resolved	2025-01-01 → 2025-12-31
MCL	Health-based	Resolved	2005-09-01 → 2005-09-30
MCL	Health-based	Resolved	2005-09-01 → 2005-09-30
MCL	Health-based	Resolved	2005-09-01 → 2005-09-30
MCL	Health-based	Resolved	2005-09-01 → 2005-09-30
MCL	Health-based	Resolved	2005-06-01 → 2005-06-30
MCL	Health-based	Resolved	2005-06-01 → 2005-06-30

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
Copper	164.1 µg/L 13% of the EPA limit 1300 µg/L worst single sample: 311 µg/L	179/180	SYR4	2012–2019
Nitrate-Nitrite	6744 µg/L 67% of the EPA limit 10000 µg/L worst single sample: 8650 µg/L	47/47	SYR4	2012–2019
Nitrate	5440 µg/L 54% of the EPA limit 10000 µg/L worst single sample: 6360 µg/L	44/44	SYR4	2012–2017
Bromoform	2.8 µg/L No EPA limit set worst single sample: 2.9 µg/L	30/34	SYR4	2012–2019
Dibromochloromethane	2.4775 µg/L No EPA limit set worst single sample: 2.5 µg/L	30/34	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	18/18	LCR	2025
TTHM	6.636 µg/L 8.3% of the EPA limit 80 µg/L worst single sample: 8.3 µg/L	17/39	SYR4	2012–2019
Arsenic	5.5675 µg/L 56% of the EPA limit 10 µg/L worst single sample: 5.6 µg/L	14/19	SYR4	2012–2019
Combined Uranium	15.275 µg/L 51% of the EPA limit 30 µg/L worst single sample: 16.9 µg/L	14/14	SYR4	2012–2019
Dibromoacetic Acid	1.8095 µg/L No EPA limit set worst single sample: 1.92 µg/L	14/27	SYR4	2012–2019
Gross Beta Particle Activity	12.115 pCi/L No EPA limit set worst single sample: 14 pCi/L	14/14	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	11 pCi/L 73% of the EPA limit 15 pCi/L worst single sample: 11.3 pCi/L	13/14	SYR4	2012–2019
Lithium	154 µg/L No EPA limit set	12/12	UCMR-5	2023
Barium	52.6 µg/L 2.6% of the EPA limit 2000 µg/L worst single sample: 53 µg/L	9/9	SYR4	2012–2019
Fluoride	1910 µg/L 48% of the EPA limit 4000 µg/L worst single sample: 1930 µg/L	9/9	SYR4	2012–2019
Lead	4.9 µg/L 33% of the EPA limit 15 µg/L worst single sample: 6.52 µg/L	9/180	SYR4	2012–2019
Combined Radium (-226 And -228)	2.15925 pCi/L 43% of the EPA limit 5 pCi/L worst single sample: 2.34 pCi/L	6/14	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	1.8775 µg/L 3.1% of the EPA limit 60 µg/L worst single sample: 1.92 µg/L	6/39	SYR4	2012–2019
Bromodichloromethane	1.1 µg/L No EPA limit set	4/34	SYR4	2012–2019
Xylenes, Total	2.01 µg/L 0% of the EPA limit 10000 µg/L worst single sample: 2.1 µg/L	4/25	SYR4	2012–2019
Benzene	0.8500 µg/L 17% of the EPA limit 5 µg/L	1/25	SYR4	2012–2019
Selenium	5 µg/L 10% of the EPA limit 50 µg/L	1/9	SYR4	2012–2019

82 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebDiquatEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: GUYMON
Phone: 580-338-0137
Email: [email protected]

Frequently asked questions about Guymon

Is Guymon tap water safe to drink?

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

EPA monitoring detected Copper, Nitrate-Nitrite, Nitrate, Bromoform, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Guymon serve?

Guymon reports serving 11,442 people in Oklahoma, per its EPA record.

Has Guymon had any water quality violations?

The EPA has 70 violations on file for Guymon, of which 34 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.