Public water system · MT0004051
ActiveCool Spring Colony
At a glance
Cool Spring Colony (PWSID MT0004051) is an active community water system in Hill County, Montana. It reports serving 75 people through 18 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 5 violations for this system; none is health-based, and the most recent began in December 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
75
Service connections
18
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Cool Spring Colony compare with other water systems in Hill County?
By EPA's size categories, Cool Spring Colony is a very small system (500 people or fewer). Hill County has 16 active public water systems. Its population served is well below the county average of 935 people per system, and accounts for 0.5% of the 14,962 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 Cool Spring Colony 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 Cool Spring Colony?
EPA lists Cool Spring Colony 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. 10 of the 16 active systems in Hill County (63%) are also privately owned.
Does Cool Spring Colony have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in December 2024. The violations listed here began between November 2013 and December 2024. By type: 5 monitoring and reporting. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2024-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2020-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
| 2014-09-29 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2013-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 5 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.
Cool Spring Colony: frequently asked questions
Who runs Cool Spring Colony?
Cool Spring Colony (PWSID MT0004051) is a community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Cool Spring Colony serve?
Cool Spring Colony reports serving 75 people through 18 service connections in Hill County, Montana.
Where does Cool Spring Colony 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 Cool Spring Colony have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in December 2024. 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 Cool Spring Colony'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 5 violations for this system; none is health-based, and the most recent began in December 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.
Where can I find Cool Spring Colony's water quality report?
As a community water system, Cool Spring Colony 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 Hill County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Havre City of | Hill | 9,921 | Community | Surface water |
| Msu Northern | Hill | 1,937 | Non-transient non-community | Purchased surface water |
| Hill County Water Districts | Hill | 1,720 | Community | Groundwater |
| Box Elder School District 13g | Hill | 500 | Non-transient non-community | Groundwater |
| Beaver Creek Golf Course | Hill | 128 | Transient non-community | Groundwater |
| East End Colony Inc. | Hill | 100 | 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, “Cool Spring Colony, PWSID MT0004051, Montana”, https://aquacensus.com/water-systems/montana/cool-spring-colony-mt0004051 (data as of October 1, 2026).