Gillette Water Quality
Wyoming
According to EPA SDWIS, Gillette, Wyoming is served by 47 community water systems covering about 45,958 people. The same extract lists 41 health-based violation records, most recently coded 5200 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
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.
PlainEnviro's health-based SDWIS extract shows 41 violation records across the 47 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 4 distinct EPA contaminant codes: LEAD AND COPPER RULE REVISIONS, Groundwater Rule, Fluoride, Combined Radium (-226 and -228). 9 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. 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?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| LAKEVIEW MOBILE HOME PARK | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| COUNTRYSIDE WATER USERS, INC. | Groundwater Rule | 2023-11-11 |
| COUNTRYSIDE WATER USERS, INC. | Groundwater Rule | 2023-11-11 |
| HOY MOBILE HOME PARK | Groundwater Rule | 2023-07-07 |
| WRANGLER ESTATES | Groundwater Rule | 2021-12-12 |
| WRANGLER ESTATES | Groundwater Rule | 2021-12-12 |
| ROZET RANCHETTES I&S DISTRICT | Fluoride | 2020-01-01 |
| ROZET RANCHETTES I&S DISTRICT | Fluoride | 2019-10-01 |
| ROZET RANCHETTES I&S DISTRICT | Fluoride | 2018-07-01 |
| ROZET RANCHETTES I&S DISTRICT | Fluoride | 2018-04-01 |
| ROZET RANCHETTES I&S DISTRICT | Fluoride | 2018-01-01 |
| WARD CREEK LANDOWNERS ASSOCIATION | Groundwater Rule | 2018-01-01 |
| WARD CREEK LANDOWNERS ASSOCIATION | Groundwater Rule | 2018-01-01 |
| ROZET RANCHETTES I&S DISTRICT | Fluoride | 2017-10-01 |
| PLAY PARK LLC | Groundwater Rule | 2017-10-01 |
| WRANGLER ESTATES | Groundwater Rule | 2017-09-29 |
| WRANGLER ESTATES | Groundwater Rule | 2017-09-29 |
| SOUTHFORK ESTATES | Combined Radium (-226 and -228) | 2017-04-01 |
| HERITAGE VILLAGE SUBDIVISION | Groundwater Rule | 2017-03-11 |
| LAKEVIEW MOBILE HOME PARK | Groundwater Rule | 2016-12-25 |
| SOUTHFORK ESTATES | Combined Radium (-226 and -228) | 2016-10-01 |
| HOY MOBILE HOME PARK | Groundwater Rule | 2016-08-31 |
| HOY MOBILE HOME PARK | Groundwater Rule | 2016-08-31 |
| HOY MOBILE HOME PARK | Groundwater Rule | 2016-08-31 |
| HOY MOBILE HOME PARK | Groundwater Rule | 2016-08-31 |
| SOUTHFORK ESTATES | Combined Radium (-226 and -228) | 2016-07-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2016-04-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2016-01-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2015-10-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2015-04-01 |
| WARD CREEK LANDOWNERS ASSOCIATION | Groundwater Rule | 2015-03-02 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2015-01-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2014-10-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2014-07-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2014-04-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2014-01-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2013-10-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2013-07-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2013-04-01 |
| BENNOR ESTATES & IMPROVEMENT DISTRICT | Combined Radium (-226 and -228) | 2013-01-01 |
| STONE GATE ESTATES | Groundwater Rule | 2011-08-15 |
What are Gillette's health-based records for?
Gillette's health-based violation records carry 4 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Groundwater Rule | 18 | 8 |
| Combined Radium (-226 and -228) | 16 | 2 |
| Fluoride | 6 | 1 |
| Lead and Copper Rule Revisions | 1 | 1 |
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
What does EPA SDWIS list for drinking water in Gillette, Wyoming? ▼
How many water violations does Gillette have in this EPA extract? ▼
What contaminants were found in Gillette water? ▼
How many water systems serve Gillette? ▼
Where does Gillette get its drinking water? ▼
Are there pollution sources near Gillette? ▼
How does Gillette compare in Wyoming?
Of the 115 Wyoming places with at least one community water system on file, Gillette ranks #1 by number of systems (47).
About This Data
Figures here are the current EPA SDWIS extract joined to the 47 community water systems whose service area lists Gillette, ranked against the 115 Wyoming places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
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.