Is Lyman, Town of Tap Water Safe? Quality Report

Water source: Ground water under surface influence
Ownership: Local government
Counties served: Uinta

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	Archived	1993-07-01 → 1993-07-31
MR	Monitoring	Resolved	2025-05-01 → 2025-05-31
MR	Monitoring	Resolved	2025-04-01 → 2025-04-30
MR	Monitoring	Resolved	2012-07-01 → 2012-09-30
MR	Monitoring	Resolved	2012-07-01 → 2012-09-30
MR	Monitoring	Resolved	2008-07-01 → 2008-09-30
MR	Monitoring	Resolved	2008-07-01 → 2008-09-30
MR	Monitoring	Resolved	2008-07-01 → 2008-09-30
MR	Monitoring	Resolved	2008-07-01 → 2008-09-30
MR	Monitoring	Resolved	2008-01-01 → 2008-03-31

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
TTHM	80.5 µg/L 101% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 103 µg/L	35/35	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	64.2 µg/L 107% of the EPA limit, at the 95th percentile of samples — 60 µg/L worst single sample: 79.1 µg/L	33/33	SYR4	2012–2019
Bromodichloromethane	20 µg/L No EPA limit set worst single sample: 21.5 µg/L	24/24	SYR4	2014–2019
Chloroform	63.1 µg/L No EPA limit set worst single sample: 76.4 µg/L	24/24	SYR4	2014–2019
Dibromochloromethane	6.055 µg/L No EPA limit set worst single sample: 6.1 µg/L	24/24	SYR4	2014–2019
Dibromoacetic Acid	1.5 µg/L No EPA limit set worst single sample: 1.7 µg/L	23/23	SYR4	2014–2019
Dichloroacetic Acid	31.7 µg/L No EPA limit set worst single sample: 33 µg/L	23/23	SYR4	2014–2019
Trichloroacetic Acid	27 µg/L No EPA limit set worst single sample: 30 µg/L	23/23	SYR4	2014–2019
Copper	959 µg/L 74% of the EPA limit 1300 µg/L worst single sample: 1130 µg/L	20/20	SYR4	2014–2017
Monochloroacetic Acid	4.36 µg/L No EPA limit set worst single sample: 4.6 µg/L	17/23	SYR4	2014–2019
Arsenic	7.8 µg/L 78% of the EPA limit 10 µg/L worst single sample: 12 µg/L	15/16	SYR4	2012–2019
Lead	11.6 µg/L 77% of the EPA limit 15 µg/L worst single sample: 12 µg/L	9/20	SYR4	2014–2017
Lead	0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L	8/8	LCR	2023
Nitrate-Nitrite	300 µg/L 3% of the EPA limit 10000 µg/L	7/8	SYR4	2012–2019
Monobromoacetic Acid	0.7600 µg/L No EPA limit set worst single sample: 0.7700 µg/L	6/23	SYR4	2014–2019
Fluoride	840 µg/L 21% of the EPA limit 4000 µg/L worst single sample: 900 µg/L	4/4	SYR4	2012–2017
Barium	100 µg/L 5% of the EPA limit 2000 µg/L	3/4	SYR4	2012–2017
Bromoform	0.7345 µg/L No EPA limit set worst single sample: 0.7400 µg/L	2/24	SYR4	2014–2019
Combined Radium (-226 And -228)	1.745 pCi/L 35% of the EPA limit 5 pCi/L worst single sample: 1.8 pCi/L	2/2	SYR4	2013–2016
Combined Uranium	8.68645 µg/L 29% of the EPA limit 30 µg/L worst single sample: 8.791 µg/L	2/2	SYR4	2013–2016
Nitrate	300 µg/L 3% of the EPA limit 10000 µg/L	2/2	SYR4	2012
Gross Alpha, Excl. Radon And U	2.7 pCi/L 18% of the EPA limit 15 pCi/L	1/2	SYR4	2013–2016
Thallium, Total	1.1 µg/L 55% of the EPA limit 2 µg/L	1/4	SYR4	2012–2017

58 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: CRANE, JARED J.
Phone: 307-780-4422
Email: [email protected]

Frequently asked questions about Lyman, Town of

Is Lyman, Town of tap water safe to drink?

EPA monitoring detected 23 contaminants in Lyman, Town of'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 Lyman, Town of's water?

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

How many people does Lyman, Town of serve?

Lyman, Town of reports serving 2,203 people in Wyoming, per its EPA record.

Has Lyman, Town of had any water quality violations?

The EPA has 30 violations on file for Lyman, Town of, of which 1 is 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.