Is Gillette, WY tap water safe?

Data: U.S. EPA · How we read the data · How we check it

No federal limits exceeded in EPA data for City of Gillette.

40 public water systems serve parts of Gillette. The largest, City of Gillette, serves 32,222 people. Your water bill names your system.

Largest system

City of Gillette

32,222 people · Groundwater · EPA ID WY5600019

PFAS	Highest average	Limit	Status
PFOA Not detected	–	4 ppt	Not detected
PFOS Not detected	–	4 ppt	Not detected
PFHxS Not detected	–	10 ppt	Not detected
PFNA Not detected	–	10 ppt	Not detected
HFPO-DA (GenX) Not detected	–	10 ppt	Not detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

Lead: 2 ppb at the 90th percentile (Nov 2026, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Across Wyoming, 1 of 32 water systems EPA tested had PFAS above a 2024 federal limit, and 0 systems were above the lead action level in results from the last five years. Wyoming results.

Gillette homes and lead pipes

31%

of homes built before 1980 (Wyoming 49%, US 50%)

built before 1950 (Wyoming 15%)

27%

of households rent (Wyoming 28%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Gillette city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Gillette

Sleepy Hollow Subdivision
2,400 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Antelope Valley I&s District (AVISD)
1,280 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Fox Park Subdivision
843 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Heritage Village Subdivision
750 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sampleAlso: 1 health-based violation since 2016
Foothills Mobile Home Park Water System
735 people · Purchased groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Eastview Manufactured Home Community Water System
688 people · Purchased groundwater · Wyoming · lists this city
Not in EPA's PFAS sample

33 more systems

Crestview Estates Subdivision
500 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Means Improvement & Service District
410 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Nickelson Farms Water Company
400 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Freedom Hills Subdivision
400 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Countryside Water Users, Inc.
360 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sampleAlso: 1 health-based violation since 2016
Highview Mfg Mobile Home Community (MHC)
304 people · Purchased groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Cook Road Water District
291 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Cedar Hills Water Association
258 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Wrangler Estates Water System
250 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sampleAlso: 2 health-based violations since 2016
American Road Water & Sewer District
220 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Stone Gate Estates Water System
198 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Force Road Joint Powers Board
195 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
People`s Improvement & Service District
176 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Lex Mobile Home Park Water System
172 people · Purchased groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Southfork Estates Water System
144 people · Groundwater · Wyoming · lists this city
Radium (combined 226/228) violations
Eagle Ridge MHP, LLC
140 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Green Valley Estates I&s District
140 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Eight Mile Subdivision
120 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Section 4 Water System Incorporated
120 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Hoy Mobile Home Park Water System
100 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sampleAlso: 3 health-based violations since 2016
Play Park LLC
96 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sampleAlso: 1 health-based violation since 2016
Rozet Ranchettes I&s District
85 people · Groundwater · Wyoming · lists this city
Fluoride violations
Pineview I&s District
75 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Stroup Trailer Court Water System
74 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Rodeo Flats Water System
72 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Overbrook Subdivision
66 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Red Hills Subdivison Water System
62 people · Purchased groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Meadow Springs Imp & Serv Water System
45 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Rafter D Improvement & Service District
40 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Fox Ridge Water System
38 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Lakeview Mobile Home Park Water System
36 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sampleAlso: 2 health-based violations since 2016
Southside Well I&s District
30 people · Purchased groundwater · Wyoming · lists this city
Not in EPA's PFAS sample
Hagens Estates Water System
29 people · Groundwater · Wyoming · lists this city
Not in EPA's PFAS sample

How nearby cities compare

City	Main water system	PFAS	Lead (90th pct.)
Casper 107 mi City of Casper	City of Casper	None above limits	1 ppb
Laramie 205 mi City of Laramie	City of Laramie	None above limits	1.28 ppb
Cheyenne 219 mi Cheyenne Board of Public Utilities	Cheyenne Board of Public Utilities	None above limits	15 ppb

Gillette ZIP codes (1)

82718

Questions

Is Gillette tap water safe to drink?

City of Gillette has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Gillette, WY?

40 public water systems serve parts of Gillette. The largest is City of Gillette (32,222 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Gillette tap water have PFAS?

None detected above EPA's reporting limits. City of Gillette had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.

Do Gillette homes have lead pipes?

Census estimates put 31% of Gillette homes as built before 1980 (Wyoming: 49%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. City of Gillette's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.