Public water system · WI6560122
ActiveHoulton MHP LLC
At a glance
Houlton MHP LLC (PWSID WI6560122) is an active community water system in St. Croix County, Wisconsin. It reports serving 170 people through 60 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
170
Service connections
60
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Houlton MHP LLC compare with other water systems in St. Croix County?
By EPA's size categories, Houlton MHP LLC is a very small system (500 people or fewer). St. Croix County has 165 active public water systems. Its population served is about half of the county average of 349 people per system, and accounts for 0.3% of the 57,590 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active community water system reports serving 6,703 people, so Houlton MHP LLC 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. Wisconsin has 1,053 active community water systems, 9.5% of the state's 11,056 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,978 Wisconsin systems (99%) list groundwater as their primary source.
Who owns and regulates Houlton MHP LLC?
EPA lists Houlton MHP LLC as privately owned. The WI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 132 of the 165 active systems in St. Croix County (80%) are also privately owned.
Does Houlton MHP LLC have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2023. The violations listed here began between January 2021 and September 2023. By type: 11 monitoring and reporting and 1 monitoring. The contaminants or rules involved are Revised Total Coliform Rule, o-Dichlorobenzene, 1,1,2-Trichloroethane and trans-1,2-Dichloroethylene. EPA lists 12 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 |
|---|---|---|---|---|
| 2023-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
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.
Houlton MHP LLC: frequently asked questions
Who runs Houlton MHP LLC?
Houlton MHP LLC (PWSID WI6560122) is a community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Houlton MHP LLC serve?
Houlton MHP LLC reports serving 170 people through 60 service connections in St. Croix County, Wisconsin.
Where does Houlton MHP LLC 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 Houlton MHP LLC have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2023. 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 Houlton MHP LLC'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, none is health-based, and the most recent began in September 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Houlton MHP LLC's water quality report?
As a community water system, Houlton MHP LLC 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 St. Croix County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Hudson Waterworks | St. Croix | 18,558 | Community | Groundwater |
| New Richmond Waterworks | St. Croix | 10,824 | Community | Groundwater |
| Baldwin Waterworks | St. Croix | 4,440 | Community | Groundwater |
| Somerset Waterworks | St. Croix | 3,334 | Community | Groundwater |
| Hammond Waterworks | St. Croix | 1,884 | Community | Groundwater |
| Roberts Waterworks | St. Croix | 1,872 | Community | 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, “Houlton MHP LLC, PWSID WI6560122, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/houlton-mhp-llc-wi6560122 (data as of October 1, 2026).