Public water system · WY5601182
ActiveRock Springs, City of
At a glance
City of Rock Springs (PWSID WY5601182) is an active community water system in Sweetwater County, Wyoming. It reports serving 24,000 people through 8,400 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in May 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
24,000
Service connections
8,400
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does City of Rock Springs compare with other water systems in Sweetwater County?
By EPA's size categories, City of Rock Springs is a large system (10,001 to 100,000 people). Sweetwater County has 44 active public water systems, and City of Rock Springs is the largest of them by population served. Its population served is about 20 times the county average of 1,215 people per system, and accounts for 45% 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 City of Rock Springs is about 3.6 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. 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 City of Rock Springs?
EPA lists City of Rock Springs 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 City of Rock Springs have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in May 2014. The violations listed here began between January 1991 and May 2014. By type: 4 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 4 as archived and 1 as resolved. 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. 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 |
|---|---|---|---|---|
| 2014-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-07-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 5 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 Rock Springs: frequently asked questions
Who runs City of Rock Springs?
City of Rock Springs (PWSID WY5601182) 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 Rock Springs serve?
City of Rock Springs reports serving 24,000 people through 8,400 service connections in Sweetwater County, Wyoming.
Where does City of Rock Springs 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 City of Rock Springs have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in May 2014. 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 Rock Springs' 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 5 violations for this system; 1 is health-based, and the most recent began in May 2014. 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 Rock Springs' water quality report?
As a community water system, City of Rock Springs 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 |
|---|---|---|---|---|
| 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 |
| Clearview I&S District | Sweetwater | 930 | Community | Purchased surface water |
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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, “Rock Springs, City of, PWSID WY5601182, Wyoming”, https://aquacensus.com/water-systems/wyoming/rock-springs-city-of-wy5601182 (data as of October 1, 2026).