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Tap water quality report

Dayton, Town of

EPA monitoring tested this supplier for 70 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

70
contaminants tested
12
detected
824
people served
3
health-based violations
Wyoming rankingsLead in WyomingPFAS in Wyoming
Water source
Surface water
Ownership
Local government
Counties served
Sheridan

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.

3
health-based violations
72
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Archived 1999-06-01 → 1999-06-30
TT Health-based Archived 1998-05-01 → 1998-05-31
TT Health-based Archived 1997-05-01 → 1997-05-31
MR Monitoring Archived 2023-07-01 → 2023-07-31
MR Monitoring Archived 2023-07-01 → 2023-07-31
MR Monitoring Archived 2023-07-01 → 2023-07-31
MR Monitoring Archived 2023-05-01 → 2023-05-31
MR Monitoring Archived 2023-05-01 → 2023-05-31
MR Monitoring Archived 2023-05-01 → 2023-05-31
MR Monitoring Archived 2023-04-01 → 2023-04-30

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
TTHM
31 µg/L 39%
of the EPA limit 80 µg/L
worst single sample: 33 µg/L
29/31 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
20.6 µg/L 34%
of the EPA limit 60 µg/L
worst single sample: 38 µg/L
25/31 SYR4 2012–2019
Nitrate-Nitrite
1300 µg/L 13%
of the EPA limit 10000 µg/L
 12/16 SYR4 2012–2019
Copper
113 µg/L 8.7%
of the EPA limit 1300 µg/L
worst single sample: 140 µg/L
10/10 SYR4 2017
Fluoride
132.2 µg/L 3.3%
of the EPA limit 4000 µg/L
worst single sample: 146 µg/L
7/8 SYR4 2012–2019
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 7/7 LCR 2023
Bhc-Gamma
0.0048 µg/L 2.4%
of the EPA limit 0.2000 µg/L
 1/3 SYR4 2013–2018
Cyanide
32 µg/L 16%
of the EPA limit 200 µg/L
 1/8 SYR4 2012–2019
Hexachlorobenzene
0.0200 µg/L 2%
of the EPA limit 1 µg/L
 1/3 SYR4 2013–2018
Heptachlor Epoxide
0.0037 µg/L 1.9%
of the EPA limit 0.2000 µg/L
 1/3 SYR4 2013–2018
Lead
3 µg/L 20%
of the EPA limit 15 µg/L
 1/10 SYR4 2017
Thallium, Total
1.31 µg/L 66%
of the EPA limit 2 µg/L
 1/8 SYR4 2012–2019
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, TotalArsenicAsbestosAtrazineBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHeptachlorHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
GRAY, CORBY
Phone
307-461-7308
Email
[email protected]

Frequently asked questions about Dayton, Town of

Is Dayton, Town of tap water safe to drink?

EPA monitoring detected 12 contaminants in Dayton, 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 Dayton, Town of's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Nitrate-Nitrite, Copper, Fluoride, and others. The full list with the level and data source for each is above.

How many people does Dayton, Town of serve?

Dayton, Town of reports serving 824 people in Wyoming, per its EPA record.

Has Dayton, Town of had any water quality violations?

The EPA has 72 violations on file for Dayton, Town of, of which 3 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.