Public water system · WY5600251
ActiveAntelope Valley I&S District (Avisd)
At a glance
Antelope Valley I&S District (Avisd) (PWSID WY5600251) is an active community water system in Campbell County, Wyoming. It reports serving 1,280 people through 313 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 8 violations for this system; none is health-based, and the most recent began in October 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,280
Service connections
313
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Antelope Valley I&S District (Avisd) compare with other water systems in Campbell County?
By EPA's size categories, Antelope Valley I&S District (Avisd) is a small system (501 to 3,300 people). Campbell County has 68 active public water systems, and Antelope Valley I&S District (Avisd) is the 4th-largest of them by population served. Its population served is about 64% above the county average of 779 people per system, and accounts for 2.4% of the 52,981 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 Antelope Valley I&S District (Avisd) 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 585 Wyoming systems (75%) list groundwater as their primary source.
Who owns and regulates Antelope Valley I&S District (Avisd)?
EPA lists Antelope Valley I&S District (Avisd) 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. 51 of the 68 active systems in Campbell County (75%) are also privately owned.
Does Antelope Valley I&S District (Avisd) have drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in October 2018. The violations listed here began between September 1992 and October 2018. By type: 7 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (6 of them). EPA lists 6 as archived and 2 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 |
|---|---|---|---|---|
| 2018-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2000-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1999-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1998-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1997-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-09-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-09-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 8 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.
Antelope Valley I&S District (Avisd): frequently asked questions
Who runs Antelope Valley I&S District (Avisd)?
Antelope Valley I&S District (Avisd) (PWSID WY5600251) is a community water system privately owned. It is regulated by the WY state drinking water program.
How many people does Antelope Valley I&S District (Avisd) serve?
Antelope Valley I&S District (Avisd) reports serving 1,280 people through 313 service connections in Campbell County, Wyoming.
Where does Antelope Valley I&S District (Avisd) get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Antelope Valley I&S District (Avisd) have any drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in October 2018. 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 Antelope Valley I&S District (Avisd)'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 8 violations for this system; none is health-based, and the most recent began in October 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the WY state drinking water program.
Where can I find Antelope Valley I&S District (Avisd)'s water quality report?
As a community water system, Antelope Valley I&S District (Avisd) 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 Campbell County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Gillette, City of | Campbell | 32,222 | Community | Groundwater |
| Wright Water & Sewer District | Campbell | 3,207 | Community | Groundwater |
| Sleepy Hollow Subdivision | Campbell | 2,400 | Community | Groundwater |
| Fox Park Subdivision | Campbell | 843 | Community | Groundwater |
| Heritage Village Subdivision | Campbell | 750 | Community | Groundwater |
| Foothills Mobile Home Park | Campbell | 735 | Community | Purchased groundwater |
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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, “Antelope Valley I&S District (Avisd), PWSID WY5600251, Wyoming”, https://aquacensus.com/water-systems/wyoming/antelope-valley-i-s-district-avisd-wy5600251 (data as of October 1, 2026).