Public water system · WY5600150
ActiveEvanston, City of
At a glance
City of Evanston (PWSID WY5600150) is an active community water system in Uinta County, Wyoming. It reports serving 11,727 people through 4,164 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; all are health-based, and the most recent began in August 1997.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
11,727
Service connections
4,164
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does City of Evanston compare with other water systems in Uinta County?
By EPA's size categories, City of Evanston is a large system (10,001 to 100,000 people). Uinta County has 12 active public water systems, and City of Evanston is the largest of them by population served. Its population served is about 6.9 times the county average of 1,702 people per system, and accounts for 57% of the 20,419 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 Evanston is about 75% above 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 50 Wyoming systems (6.5%) list surface water as their primary source.
Who owns and regulates City of Evanston?
EPA lists City of Evanston 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 12 active systems in Uinta County (42%) are also owned by a local government.
Does City of Evanston have drinking water violations?
EPA's records list 3 violations for this system; all are health-based, and the most recent began in August 1997. The violations listed here began between August 1991 and August 1997. By type: 3 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 1997-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1991-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1991-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 3 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 Evanston: frequently asked questions
Who runs City of Evanston?
City of Evanston (PWSID WY5600150) 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 Evanston serve?
City of Evanston reports serving 11,727 people through 4,164 service connections in Uinta County, Wyoming.
Where does City of Evanston get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does City of Evanston have any drinking water violations?
EPA's records list 3 violations for this system; all are health-based, and the most recent began in August 1997. 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 Evanston'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 3 violations for this system; all are health-based, and the most recent began in August 1997. 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 Evanston's water quality report?
As a community water system, City of Evanston 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 Uinta County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lyman, Town of | Uinta | 2,203 | Community | Groundwater under influence of surface water |
| Bridger Valley Joint Powers Board | Uinta | 1,728 | Community | Surface water |
| Mountain View, Town of | Uinta | 1,250 | Community | Purchased surface water |
| Bear River Regional Joint Powers | Uinta | 1,200 | Community | Purchased surface water |
| Wy Dot-Evanston Port of Entry | Uinta | 1,000 | Transient non-community | Groundwater |
| Travel Centers of America-Ft. Bridger | Uinta | 570 | Non-transient non-community | Groundwater |
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, “Evanston, City of, PWSID WY5600150, Wyoming”, https://aquacensus.com/water-systems/wyoming/evanston-city-of-wy5600150 (data as of October 1, 2026).