Public water system · MT0000474
ActiveWindmill Trailer Park Well 1
At a glance
Windmill Trailer Park Well 1 (PWSID MT0000474) is an active community water system in Park County, Montana. It reports serving 110 people through 36 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in January 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
110
Service connections
36
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Windmill Trailer Park Well 1 compare with other water systems in Park County?
By EPA's size categories, Windmill Trailer Park Well 1 is a very small system (500 people or fewer). Park County has 59 active public water systems. Its population served is about 59% below the county average of 271 people per system, and accounts for 0.7% of the 15,983 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active community water system reports serving 6,703 people, so Windmill Trailer Park Well 1 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. Montana has 853 active community water systems, 36% of the state's 2,378 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,994 Montana systems (84%) list groundwater as their primary source.
Who owns and regulates Windmill Trailer Park Well 1?
EPA lists Windmill Trailer Park Well 1 as privately owned. The MT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 49 of the 59 active systems in Park County (83%) are also privately owned.
Does Windmill Trailer Park Well 1 have drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in January 2020. The violations listed here began between October 1996 and January 2020. By type: 5 monitoring and reporting and 2 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (4 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Thalliumcode 1085 | No | Resolved |
| 2009-03-23 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2008-11-23 | Required treatment not metPublic Education · code 65 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2008-07-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2004-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 1996-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 7 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.
Windmill Trailer Park Well 1: frequently asked questions
Who runs Windmill Trailer Park Well 1?
Windmill Trailer Park Well 1 (PWSID MT0000474) is a community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Windmill Trailer Park Well 1 serve?
Windmill Trailer Park Well 1 reports serving 110 people through 36 service connections in Park County, Montana.
Where does Windmill Trailer Park Well 1 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 Windmill Trailer Park Well 1 have any drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in January 2020. 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 Windmill Trailer Park Well 1'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 7 violations for this system; 2 are health-based, and the most recent began in January 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.
Where can I find Windmill Trailer Park Well 1's water quality report?
As a community water system, Windmill Trailer Park Well 1 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 Park County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Livingston City of | Park | 7,500 | Community | Groundwater |
| Emigrant Rest Stop | Park | 800 | Transient non-community | Groundwater |
| Gardiner Park Co Water Dist | Park | 700 | Community | Groundwater |
| Yellowstone Travel Plaza Truck Stop | Park | 500 | Transient non-community | Groundwater |
| Sage Lodge | Park | 500 | Transient non-community | Groundwater |
| Chico Hot Springs | Park | 415 | Non-transient non-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, “Windmill Trailer Park Well 1, PWSID MT0000474, Montana”, https://aquacensus.com/water-systems/montana/windmill-trailer-park-well-1-mt0000474 (data as of October 1, 2026).