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Tap water quality report

Gillette, City of

EPA monitoring tested this supplier for 79 contaminants and detected 22. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

79
contaminants tested
22
detected
32,222
people served
1
health-based violations
Wyoming rankingsLead in WyomingPFAS in Wyoming
Water source
Ground water
Ownership
Local government
Counties served
Campbell

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.

1
health-based violations
4
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1995-07-01 → 1995-07-31
MR Monitoring Resolved 2023-10-01 → 2023-12-31
MON Monitoring Resolved 2023-06-01 → 2023-06-30
MR Monitoring Archived 1995-07-01 → 1995-07-31

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
237.6 µg/L 18%
of the EPA limit 1300 µg/L
worst single sample: 320 µg/L
93/94 SYR4 2013–2019
Lead
10 µg/L 67%
of the EPA limit 15 µg/L
worst single sample: 19 µg/L
61/94 SYR4 2013–2019
TTHM
13.95 µg/L 17%
of the EPA limit 80 µg/L
worst single sample: 15 µg/L
42/44 SYR4 2012–2019
Nitrate-Nitrite
330 µg/L 3.3%
of the EPA limit 10000 µg/L
 36/36 SYR4 2012–2019
Chloroform
4.26 µg/L
No EPA limit set
worst single sample: 4.6 µg/L
35/38 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
4.405 µg/L 7.3%
of the EPA limit 60 µg/L
worst single sample: 4.8 µg/L
34/40 SYR4 2012–2019
Bromodichloromethane
4.49 µg/L
No EPA limit set
worst single sample: 5 µg/L
32/38 SYR4 2013–2019
Dibromochloromethane
4.89 µg/L
No EPA limit set
worst single sample: 5.2 µg/L
32/38 SYR4 2013–2019
Bromoform
2.61 µg/L
No EPA limit set
worst single sample: 2.9 µg/L
30/38 SYR4 2013–2019
Dibromoacetic Acid
1.58 µg/L
No EPA limit set
worst single sample: 1.7 µg/L
25/34 SYR4 2013–2019
Dichloroacetic Acid
2.04 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
24/34 SYR4 2013–2019
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 19/19 LCR 2025
Trichloroacetic Acid
0.7400 µg/L
No EPA limit set
worst single sample: 0.7700 µg/L
13/34 SYR4 2013–2019
Arsenic
3 µg/L 30%
of the EPA limit 10 µg/L
 8/8 SYR4 2012–2018
Fluoride
1500 µg/L 38%
of the EPA limit 4000 µg/L
 8/8 SYR4 2012–2018
Selenium
9 µg/L 18%
of the EPA limit 50 µg/L
 8/8 SYR4 2012–2018
Barium
100 µg/L 5%
of the EPA limit 2000 µg/L
 3/8 SYR4 2012–2018
Combined Radium (-226 And -228)
2.28 pCi/L 46%
of the EPA limit 5 pCi/L
worst single sample: 2.4 pCi/L
3/3 SYR4 2013–2018
Combined Uranium
9.14 µg/L 30%
of the EPA limit 30 µg/L
worst single sample: 9.3 µg/L
3/3 SYR4 2013–2018
Gross Alpha, Excl. Radon And U
9.81 pCi/L 65%
of the EPA limit 15 pCi/L
worst single sample: 10 pCi/L
3/3 SYR4 2013–2018
Monobromoacetic Acid
0.5670 µg/L
No EPA limit set
worst single sample: 0.5700 µg/L
2/34 SYR4 2013–2019
Monochloroacetic Acid
1.181 µg/L
No EPA limit set
worst single sample: 1.2 µg/L
2/34 SYR4 2013–2019
57 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 EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
JONES, HOWARD
Phone
307-686-5276
Email
[email protected]

Frequently asked questions about Gillette, City of

Is Gillette, City of tap water safe to drink?

EPA monitoring detected 22 contaminants in Gillette, City 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 Gillette, City of's water?

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

How many people does Gillette, City of serve?

Gillette, City of reports serving 32,222 people in Wyoming, per its EPA record.

Has Gillette, City of had any water quality violations?

The EPA has 4 violations on file for Gillette, City 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.