PlainEnviro

Gillette Water Quality

Wyoming

Health Violations

The tap water in Gillette, Wyoming is served by 47 EPA-regulated water systems covering approximately 45,958 people. 41 health-based violations are on record, most recently for 5200 in 2024. Data source: EPA Safe Drinking Water Information System.

47
Water Systems
45,958
Population Served
41
Total Violations
41
Health-Based Violations

Drinking water in Gillette, Wyoming is delivered through 47 EPA-regulated community water systems serving an estimated 45,958 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.

The SDWIS record for Gillette shows 41 total violations across all 47 systems, of which 41 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 5200, 0700, 1025, 4010. 9 TRI-reporting industrial facilities are also located within the city limits.

A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Wyoming drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.

Community Water Systems

System Name Pop. Served Violations Status
GILLETTE, CITY OF 32,222 0 Clean
SLEEPY HOLLOW SUBDIVISION 2,400 0 Clean
ANTELOPE VALLEY I&S DISTRICT (AVISD) 1,280 0 Clean
FOX PARK SUBDIVISION 843 0 Clean
HERITAGE VILLAGE SUBDIVISION 750 1 Health
FOOTHILLS MOBILE HOME PARK 735 0 Clean
EASTVIEW MANUFACTURED HOME COMMUNITY 688 0 Clean
CRESTVIEW ESTATES SUBDIVISION 500 0 Clean
PINE HAVEN, TOWN OF 498 0 Clean
WESTVIEW MHC 416 0 Clean
MEANS IMPROVEMENT & SERVICE DISTRICT 410 0 Clean
NICKELSON FARMS WATER COMPANY 400 0 Clean
FREEDOM HILLS SUBDIVISION 400 0 Clean
COUNTRYSIDE WATER USERS, INC. 360 2 Health
HIGHVIEW MFG MOBILE HOME COMMUNITY (MHC) 304 0 Clean
COOK ROAD WATER DISTRICT 291 0 Clean
CEDAR HILLS WATER ASSOCIATION 258 0 Clean
WRANGLER ESTATES 250 4 Health
AMERICAN ROAD W&S DISTRICT 220 0 Clean
STONE GATE ESTATES 198 1 Health
FORCE ROAD JOINT POWERS BOARD 195 0 Clean
PEOPLE`S IMPROVEMENT & SERVICE DISTRICT 176 0 Clean
BALD MOUNTAIN TRAILER COURT 150 0 Clean
SOUTHFORK ESTATES 144 3 Health
BENNOR ESTATES & IMPROVEMENT DISTRICT 144 13 Health
EAGLE RIDGE MHP, LLC 140 0 Clean
GREEN VALLEY ESTATES I&S DISTRICT 140 0 Clean
NORTH GURLEY MOBILE HOME PARK 128 0 Clean
VISTA WEST IMPROVEMENT & SERV DISTRICT 120 0 Clean
EIGHT MILE SUBDIVISION 120 0 Clean
SECTION 4 WATER SYSTEM INCORPORATED 120 0 Clean
HOY MOBILE HOME PARK 100 5 Health
PLAY PARK LLC 96 1 Health
ROZET RANCHETTES I&S DISTRICT 85 6 Health
WARD CREEK LANDOWNERS ASSOCIATION 77 3 Health
PINEVIEW I&S DISTRICT 75 0 Clean
STROUP TRAILER COURT 74 0 Clean
RODEO FLATS 72 0 Clean
OVERBROOK SUBDIVISION 66 0 Clean
RED HILLS SUBDIVISON 62 0 Clean
MEADOW SPRINGS IMP & SERV 45 0 Clean
RAFTER D IMPROVEMENT & SERVICE DISTRICT 40 0 Clean
FOX RIDGE WATER SYSTEM 38 0 Clean
LAKEVIEW MOBILE HOME PARK 36 2 Health
BUCKMILLER ENTERPRISES, LLC 33 0 Clean
SOUTHSIDE WELL I&S DISTRICT 30 0 Clean
HAGENS ESTATES 29 0 Clean

Does this city have health-based water violations?

Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.

Contaminant Begin Date
5200 2024-10-17
0700 2023-11-11
0700 2023-11-11
0700 2023-07-07
0700 2021-12-12
0700 2021-12-12
1025 2020-01-01
1025 2019-10-01
1025 2018-07-01
1025 2018-04-01
1025 2018-01-01
0700 2018-01-01
0700 2018-01-01
1025 2017-10-01
0700 2017-10-01
0700 2017-09-29
0700 2017-09-29
4010 2017-04-01
0700 2017-03-11
0700 2016-12-25
4010 2016-10-01
0700 2016-08-31
0700 2016-08-31
0700 2016-08-31
0700 2016-08-31
4010 2016-07-01
4010 2016-04-01
4010 2016-01-01
4010 2015-10-01
4010 2015-04-01
0700 2015-03-02
4010 2015-01-01
4010 2014-10-01
4010 2014-07-01
4010 2014-04-01
4010 2014-01-01
4010 2013-10-01
4010 2013-07-01
4010 2013-04-01
4010 2013-01-01
0700 2011-08-15

TRI Facilities in Gillette

Facility Total Releases
Black Hills Corp - Neil Simpson Complex 8.7M lbs
Basin Electric Dry Fork Station 5.4M lbs
Pacificorp Wyodak Plant 4.0M lbs
Western Gas Resources Hilight Gas Plant 993.2K lbs
50 Buttes 118.5K lbs
Joy Global Gillette Wy 765 lbs
Nelson Brothers Mining Services LLC 417 lbs
Buckskin Mining Co Gillette Wy 44 lbs
Austin Powder Mining LLC 0 lbs

Frequently Asked Questions

Is Gillette, Wyoming water safe to drink? ▼
Gillette is served by 47 EPA-regulated water systems covering approximately 45,958 people. 41 health-based violations have been recorded. A past violation does not necessarily mean water is currently unsafe, systems are required to notify customers and resolve issues. Contact your local water utility for current status.
How many water violations does Gillette have? ▼
Gillette water systems have a total of 41 violations on record in the EPA Safe Drinking Water Information System, of which 41 are health-based (MCL exceedances). The remaining violations are monitoring or reporting violations.
What contaminants were found in Gillette water? ▼
Health-based violations for Gillette water systems include the following contaminants: 5200, 0700, 1025, 4010. Source: EPA Safe Drinking Water Information System (SDWIS).
How many water systems serve Gillette? ▼
47 EPA-regulated community water systems serve Gillette, Wyoming, collectively covering approximately 45,958 people. Data is from the EPA Safe Drinking Water Information System (SDWIS).
Where does Gillette get its drinking water? ▼
Gillette's water supply comes from 47 EPA-regulated community water systems. Source type data is not available for all systems. For detailed supply information, contact your local water utility. Source: EPA SDWIS.
Are there pollution sources near Gillette? ▼
Yes, 9 EPA Toxic Release Inventory (TRI) facilities are registered in Gillette, Wyoming, reporting a combined 19.2M lbs of toxic chemical releases. TRI data reflects self-reported emissions; it does not measure exposure or health effects. Source: EPA TRI.

Related Guides

Understanding Water Quality Violations
What MCL violations mean and how to read EPA data
How to Check Environmental Quality
Step-by-step guide to checking your local environment
Understanding EPA Data
How EPA collects and publishes environmental data

About This Data

Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.

A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.

TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial