Public water system · WY5601537
ActiveDowner Neighborhood I&S District
At a glance
Downer Neighborhood I&S District (PWSID WY5601537) is an active community water system in Sheridan County, Wyoming. It reports serving 400 people through 225 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
400
Service connections
225
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Downer Neighborhood I&S District compare with other water systems in Sheridan County?
By EPA's size categories, Downer Neighborhood I&S District is a very small system (500 people or fewer). Sheridan County has 21 active public water systems, and Downer Neighborhood I&S District is the 6th-largest of them by population served. Its population served is well below the county average of 1,322 people per system, and accounts for 1.4% of the 27,770 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 Downer Neighborhood I&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 Downer Neighborhood I&S District?
EPA lists Downer Neighborhood I&S District as privately owned. 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. 9 of the 21 active systems in Sheridan County (43%) are also privately owned.
Does Downer Neighborhood I&S District have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2014. The violations listed here began between July 2003 and January 2014. By type: 4 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2003-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2003-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 4 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.
Downer Neighborhood I&S District: frequently asked questions
Who runs Downer Neighborhood I&S District?
Downer Neighborhood I&S District (PWSID WY5601537) is a community water system privately owned. It is regulated by the WY state drinking water program.
How many people does Downer Neighborhood I&S District serve?
Downer Neighborhood I&S District reports serving 400 people through 225 service connections in Sheridan County, Wyoming.
Where does Downer Neighborhood I&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 Downer Neighborhood I&S District have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 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 Downer Neighborhood I&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 4 violations for this system; none is health-based, and the most recent began in January 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 Downer Neighborhood I&S District's water quality report?
As a community water system, Downer Neighborhood I&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 Sheridan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Sheridan, City of | Sheridan | 22,700 | Community | Surface water |
| Ranchester, Town of | Sheridan | 1,297 | Community | Surface water |
| Dayton, Town of | Sheridan | 824 | Community | Surface water |
| Veterans Administration Medical Center | Sheridan | 685 | Community | Surface water |
| Ucross Guest Ranch | Sheridan | 441 | Transient non-community | Groundwater |
| Eaton'S Dude Ranch | Sheridan | 210 | 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, “Downer Neighborhood I&S District, PWSID WY5601537, Wyoming”, https://aquacensus.com/water-systems/wyoming/downer-neighborhood-i-s-district-wy5601537 (data as of October 1, 2026).