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Tap water quality report

Cowley, Town of

EPA monitoring tested this supplier for 76 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

76
contaminants tested
13
detected
800
people served
5
health-based violations
Wyoming rankingsLead in WyomingPFAS in Wyoming
Water source
Ground water
Ownership
Local government
Counties served
Big Horn

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.

5
health-based violations
46
violations on file
1
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2019-11-02
TT Health-based Resolved 2017-01-22
TT Health-based Resolved 2017-01-22
MCL Health-based Archived 1992-08-01 → 1992-08-31
MCL Health-based Archived 1992-08-01 → 1992-08-31
MR Monitoring Unaddressed 2025-09-29
MR Monitoring Resolved 2024-12-30
MR Monitoring Resolved 2021-12-30
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 1999-01-01 → 1999-12-31

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
128 µg/L 9.8%
of the EPA limit 1300 µg/L
worst single sample: 131 µg/L
21/21 SYR4 2015–2018
Nitrate-Nitrite
270 µg/L 2.7%
of the EPA limit 10000 µg/L
 10/10 SYR4 2012–2019
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 7/7 LCR 2024
Lead
4 µg/L 27%
of the EPA limit 15 µg/L
 5/21 SYR4 2015–2018
Fluoride
1600 µg/L 40%
of the EPA limit 4000 µg/L
 4/4 SYR4 2013–2018
Arsenic
4 µg/L 40%
of the EPA limit 10 µg/L
 3/3 SYR4 2013–2018
Barium
70 µg/L 3.5%
of the EPA limit 2000 µg/L
 3/3 SYR4 2013–2018
Selenium
5 µg/L 10%
of the EPA limit 50 µg/L
 3/3 SYR4 2013–2018
Combined Radium (-226 And -228)
4.685 pCi/L 94%
of the EPA limit 5 pCi/L
worst single sample: 4.8 pCi/L
2/2 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
8.185 pCi/L 55%
of the EPA limit 15 pCi/L
worst single sample: 8.4 pCi/L
2/2 SYR4 2013–2019
Nitrate
270 µg/L 2.7%
of the EPA limit 10000 µg/L
 2/2 SYR4 2012
Combined Uranium
4.9 µg/L 16%
of the EPA limit 30 µg/L
 1/2 SYR4 2013–2019
Thallium, Total
0.5000 µg/L 25%
of the EPA limit 2 µg/L
 1/3 SYR4 2013–2018
63 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BARNES, JOHN W.
Phone
307-548-6799
Email
[email protected]

Frequently asked questions about Cowley, Town of

Is Cowley, Town of tap water safe to drink?

EPA monitoring detected 13 contaminants in Cowley, 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 Cowley, Town of's water?

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

How many people does Cowley, Town of serve?

Cowley, Town of reports serving 800 people in Wyoming, per its EPA record.

Has Cowley, Town of had any water quality violations?

The EPA has 46 violations on file for Cowley, Town of, of which 5 are health-based (a contaminant limit or required treatment was breached) and 1 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.