Public water system · WY5600025
ActiveHanna, Town of
At a glance
Town of Hanna (PWSID WY5600025) is an active community water system in Carbon County, Wyoming. It reports serving 841 people through 455 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in September 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
841
Service connections
455
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Town of Hanna compare with other water systems in Carbon County?
By EPA's size categories, Town of Hanna is a small system (501 to 3,300 people). Carbon County has 25 active public water systems, and Town of Hanna is the 4th-largest of them by population served. Its population served is about 16% above the county average of 725 people per system, and accounts for 4.6% of the 18,136 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 Hanna 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. 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 Town of Hanna?
EPA lists Town of Hanna 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. 10 of the 25 active systems in Carbon County (40%) are also owned by a local government.
Does Town of Hanna have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in September 2016. The violations listed here began between November 1993 and September 2016. By type: 10 monitoring and reporting and 2 required treatment not met. The contaminant or rule involved most often is Surface Water Treatment Rule (3 of them). EPA lists 9 as resolved and 3 as archived. 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. 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 |
|---|---|---|---|---|
| 2016-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2016-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2015-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-11-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2014-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2008-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2004-04-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2003-08-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1994-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1993-11-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
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 Hanna: frequently asked questions
Who runs Town of Hanna?
Town of Hanna (PWSID WY5600025) 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 Hanna serve?
Town of Hanna reports serving 841 people through 455 service connections in Carbon County, Wyoming.
Where does Town of Hanna 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 Town of Hanna have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in September 2016. 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 Hanna'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, 2 are health-based, and the most recent began in September 2016. 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 Hanna's water quality report?
As a community water system, Town of Hanna 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 Carbon County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Rawlins Water Supply, City of | Carbon | 9,006 | Community | Surface water |
| Saratoga, Town of | Carbon | 1,720 | Community | Groundwater |
| Wy Dot-Fort Steele Rest Area | Carbon | 1,660 | Transient non-community | Surface water |
| Wy Dot-Wagonhound Rest Area | Carbon | 750 | Transient non-community | Groundwater |
| Brush Creek Ranch | Carbon | 717 | Transient non-community | Groundwater |
| Encampment, Town of | Carbon | 450 | Community | 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, “Hanna, Town of, PWSID WY5600025, Wyoming”, https://aquacensus.com/water-systems/wyoming/hanna-town-of-wy5600025 (data as of October 1, 2026).