Public water system · WY5600810
ActiveJamestown-Rio Vista W&S District
At a glance
Jamestown-Rio Vista W&S District (PWSID WY5600810) is an active community water system in Sweetwater County, Wyoming. It reports serving 560 people through 194 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in March 1994.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
560
Service connections
194
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Jamestown-Rio Vista W&S District compare with other water systems in Sweetwater County?
By EPA's size categories, Jamestown-Rio Vista W&S District is a small system (501 to 3,300 people). Sweetwater County has 44 active public water systems. Its population served is about half of the county average of 1,215 people per system, and accounts for 1% of the 53,453 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 Jamestown-Rio Vista W&S District 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 79 Wyoming systems (10%) list purchased surface water as their primary source.
Who owns and regulates Jamestown-Rio Vista W&S District?
EPA lists Jamestown-Rio Vista W&S District 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. 11 of the 44 active systems in Sweetwater County (25%) are also owned by a local government.
Does Jamestown-Rio Vista W&S District have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in March 1994. By type: 1 monitoring and reporting. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 as archived. 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 |
|---|---|---|---|---|
| 1994-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
The one violation in EPA's records.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.
Jamestown-Rio Vista W&S District: frequently asked questions
Who runs Jamestown-Rio Vista W&S District?
Jamestown-Rio Vista W&S District (PWSID WY5600810) is a community water system owned by a local government. It is regulated by the WY state drinking water program.
How many people does Jamestown-Rio Vista W&S District serve?
Jamestown-Rio Vista W&S District reports serving 560 people through 194 service connections in Sweetwater County, Wyoming.
Where does Jamestown-Rio Vista W&S District get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Jamestown-Rio Vista W&S District have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in March 1994. 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 Jamestown-Rio Vista W&S District'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 one violation for this system; it is not health-based, and the most recent began in March 1994. For current results, consult the system's annual water quality report, EPA ECHO, or the WY state drinking water program.
Where can I find Jamestown-Rio Vista W&S District's water quality report?
As a community water system, Jamestown-Rio Vista W&S District 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 Sweetwater County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Rock Springs, City of | Sweetwater | 24,000 | Community | Purchased surface water |
| Green River, City of | Sweetwater | 10,500 | Community | Purchased surface water |
| White Mountain W&S District | Sweetwater | 3,000 | Community | Purchased surface water |
| Little America Hotels & Resorts, Inc.- Wy | Sweetwater | 2,004 | Community | Surface water |
| Pioneer Mobile Home Park | Sweetwater | 1,000 | Community | Purchased surface water |
| We Soda Alkali, LLC | Sweetwater | 950 | Non-transient non-community | Surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Jamestown-Rio Vista W&S District, PWSID WY5600810, Wyoming”, https://aquacensus.com/water-systems/wyoming/jamestown-rio-vista-w-s-district-wy5600810 (data as of October 1, 2026).