Public water system · WY5600798

Active

Wyodak Mine

At a glance

Wyodak Mine (PWSID WY5600798) is an active non-transient non-community water system in Campbell County, Wyoming. It reports serving 60 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2020.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDWY5600798

System typeNon-transient non-community water system

Activity statusActive

Population served60

Service connections2

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyWY state drinking water program

City servedGillette

StateWyoming

ZIP—

CountyCampbell County

How does Wyodak Mine compare with other water systems in Campbell County?

By EPA's size categories, Wyodak Mine is a very small system (500 people or fewer). Campbell County has 68 active public water systems. Its population served is well below the county average of 779 people per system, and accounts for 0.1% 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 non-transient non-community water system reports serving 430 people, so Wyodak Mine is well below that figure.

What does “non-transient non-community water system” mean?

A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Wyoming has 91 active non-transient non-community water systems, 12% 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 Wyodak Mine?

EPA lists Wyodak Mine 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 Wyodak Mine have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2020. The violations listed here began between October 2020 and October 2020. By type: 12 monitoring and reporting. The contaminants or rules involved are 1,2,4-Trichlorobenzene, cis-1,2-Dichloroethylene, Xylenes, Total and trans-1,2-Dichloroethylene. EPA lists 12 as resolved. 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.

Began	Violation	Contaminant or rule	Health-based	Status
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	1,2,4-Trichlorobenzenecode 2378	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	cis-1,2-Dichloroethylenecode 2380	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	Xylenes, Totalcode 2955	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	trans-1,2-Dichloroethylenecode 2979	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	1,2-Dichloroethanecode 2980	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	1,1,1-Trichloroethanecode 2981	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	Carbon tetrachloridecode 2982	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	1,2-Dichloropropanecode 2983	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	Trichloroethylenecode 2984	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	1,1,2-Trichloroethanecode 2985	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	Chlorobenzenecode 2989	No	Resolved
2020-10-01	Monitoring and reportingMonitoring, Regular · code 03	Asbestoscode 1094	No	Resolved

The 12 most recent 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.

Wyodak Mine: frequently asked questions

Who runs Wyodak Mine?

Wyodak Mine (PWSID WY5600798) is a non-transient non-community water system owned by a local government. It is regulated by the WY state drinking water program.

How many people does Wyodak Mine serve?

Wyodak Mine reports serving 60 people through 2 service connections in Campbell County, Wyoming.

Where does Wyodak Mine 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 Wyodak Mine have any drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2020. 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 Wyodak Mine'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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2020. For current results, consult EPA ECHO, or the WY state drinking water program.

Where can I find Wyodak Mine's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Wyodak Mine is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

Other water systems in Campbell County

Water system	County	Population served	Type	Source
Gillette, City of	Campbell	32,222	Community	Groundwater
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

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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, “Wyodak Mine, PWSID WY5600798, Wyoming”, https://aquacensus.com/water-systems/wyoming/wyodak-mine-wy5600798 (data as of October 1, 2026).