Public water system · WY5600019
ActiveGillette, City of
At a glance
City of Gillette (PWSID WY5600019) is an active community water system in Campbell County, Wyoming. It reports serving 32,222 people through 10,637 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
32,222
Service connections
10,637
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Gillette compare with other water systems in Campbell County?
By EPA's size categories, City of Gillette is a large system (10,001 to 100,000 people). Campbell County has 68 active public water systems, and City of Gillette is the largest of them by population served. Its population served is about 41 times the county average of 779 people per system, and accounts for 61% of the 52,981 people reported by systems filed under the county. Across Wyoming, the 775 active systems average 838 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Gillette is about 4.8 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Wyoming has 332 active community water systems, 43% of the state's 775 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 585 Wyoming systems (75%) list groundwater as their primary source.
Who owns and regulates City of Gillette?
EPA lists City of Gillette as owned by a local government. The WY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 16 of the 68 active systems in Campbell County (24%) are also owned by a local government.
Does City of Gillette have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2023. The violations listed here began between July 1995 and October 2023. By type: 2 monitoring and reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 as resolved and 2 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2023-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 1995-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1995-07-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 4 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
City of Gillette: frequently asked questions
Who runs City of Gillette?
City of Gillette (PWSID WY5600019) is a community water system owned by a local government. It is regulated by the WY state drinking water program.
How many people does City of Gillette serve?
City of Gillette reports serving 32,222 people through 10,637 service connections in Campbell County, Wyoming.
Where does City of Gillette get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does City of Gillette have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2023. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is City of Gillette's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the WY state drinking water program.
Where can I find City of Gillette's water quality report?
As a community water system, City of Gillette must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Campbell County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Wright Water & Sewer District | Campbell | 3,207 | Community | Groundwater |
| Sleepy Hollow Subdivision | Campbell | 2,400 | Community | Groundwater |
| Antelope Valley I&S District (Avisd) | Campbell | 1,280 | Community | Groundwater |
| Fox Park Subdivision | Campbell | 843 | Community | Groundwater |
| Heritage Village Subdivision | Campbell | 750 | Community | Groundwater |
| Foothills Mobile Home Park | Campbell | 735 | Community | Purchased groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Gillette, City of, PWSID WY5600019, Wyoming”, https://aquacensus.com/water-systems/wyoming/gillette-city-of-wy5600019 (data as of October 1, 2026).