Public water system · WY5600007
ActiveBig Piney, Town of
At a glance
Town of Big Piney (PWSID WY5600007) is an active community water system in Sublette County, Wyoming. It reports serving 445 people through 254 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 April 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
445
Service connections
254
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Town of Big Piney compare with other water systems in Sublette County?
By EPA's size categories, Town of Big Piney is a very small system (500 people or fewer). Sublette County has 27 active public water systems, and Town of Big Piney is the 5th-largest of them by population served. Its population served is about twice the county average of 212 people per system, and accounts for 7.8% of the 5,723 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 Town of Big Piney is well below 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 Town of Big Piney?
EPA lists Town of Big Piney 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. 5 of the 27 active systems in Sublette County (19%) are also owned by a local government.
Does Town of Big Piney have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2021. The violations listed here began between January 2018 and April 2021. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Nitrate-Nitrite (2 of them). 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 |
|---|---|---|---|---|
| 2021-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2021-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2021-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2021-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | 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.
Town of Big Piney: frequently asked questions
Who runs Town of Big Piney?
Town of Big Piney (PWSID WY5600007) is a community water system owned by a local government. It is regulated by the WY state drinking water program.
How many people does Town of Big Piney serve?
Town of Big Piney reports serving 445 people through 254 service connections in Sublette County, Wyoming.
Where does Town of Big Piney 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 Town of Big Piney 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 April 2021. 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 Town of Big Piney'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 April 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the WY state drinking water program.
Where can I find Town of Big Piney's water quality report?
As a community water system, Town of Big Piney 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 Sublette County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pinedale Municipal Ws | Sublette | 1,900 | Community | Surface water |
| Marbleton, Town of | Sublette | 861 | Community | Groundwater |
| High Meadow Ranch | Sublette | 580 | Community | Groundwater |
| Bomgaars Supply, Incorporated | Sublette | 450 | Transient non-community | Groundwater |
| Jonah Energy (Linn) Oc | Sublette | 130 | Non-transient non-community | Groundwater |
| Daniel Junction | Sublette | 125 | Transient non-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, “Big Piney, Town of, PWSID WY5600007, Wyoming”, https://aquacensus.com/water-systems/wyoming/big-piney-town-of-wy5600007 (data as of October 1, 2026).