BASIN, WY · Big Horn County
MANDERSON, TOWN OF Water System
Consumer Confidence Report status
MANDERSON, TOWN OF must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for MANDERSON, TOWN OF.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Wyoming’s official records. Always confirm current status with Wyoming before making decisions based on this information.
System facts
- System ID (PWSID)
- WY5600204
- System type
- Community Water System
- Population served
- 110
- Service connections
- 59
- Ownership
- local government
- Water source
- groundwater (wells)
MANDERSON, TOWN OF is one of 486 community water systems in Wyoming in the 500 or fewer people size category, serving 110 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries between 1976 and 1980, all of which EPA lists as closed. Nothing has been added since 1980.
All 2 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Radionuclides and Revised Rad Rule.
Violation history
Monitoring, Regular
—Gross Alpha, Excl. Radon and U
July 1, 1980 – June 30, 1981
ArchivedMonitoring, Regular
—Combined Radium (-226 and -228)
July 1, 1976 – June 30, 1980
Archived
Archived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 1, 1980 – June 30, 1981 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
| July 1, 1976 – June 30, 1980 | Monitoring, Regular | Combined Radium (-226 and -228) | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- June 23, 2025Federal Final Administrative Order issued4 linked violations
- May 11, 2011State Compliance achieved4 linked violations
Common questions
Is MANDERSON, TOWN OF required to publish a Consumer Confidence Report?
- Yes. MANDERSON, TOWN OF is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is MANDERSON, TOWN OF’s next Consumer Confidence Report due?
- MANDERSON, TOWN OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MANDERSON, TOWN OF have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for MANDERSON, TOWN OF.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
DELLOS, MIKE
000-000-0000
BASIN, WY 82410