Public water system · MT0003968
ActiveHildreth Subdivision No 3
At a glance
Hildreth Subdivision No 3 (PWSID MT0003968) is an active community water system in Beaverhead County, Montana. It reports serving 128 people through 42 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, 3 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
128
Service connections
42
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Hildreth Subdivision No 3 compare with other water systems in Beaverhead County?
By EPA's size categories, Hildreth Subdivision No 3 is a very small system (500 people or fewer). Beaverhead County has 48 active public water systems. Its population served is about 35% below the county average of 198 people per system, and accounts for 1.3% of the 9,494 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 Hildreth Subdivision No 3 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 Hildreth Subdivision No 3?
EPA lists Hildreth Subdivision No 3 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. 24 of the 48 active systems in Beaverhead County (50%) are also privately owned.
Does Hildreth Subdivision No 3 have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2024. The violations listed here began between July 2012 and October 2024. By type: 6 monitoring and reporting, 3 contaminant level above the legal limit, 2 monitoring and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). 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 |
|---|---|---|---|---|
| 2024-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2023-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2021-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2021-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, E. coli (RTCR) · code 1A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Asbestoscode 1094 | No | Resolved |
| 2019-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-08-05 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2015-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2012-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2012-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | 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.
Hildreth Subdivision No 3: frequently asked questions
Who runs Hildreth Subdivision No 3?
Hildreth Subdivision No 3 (PWSID MT0003968) is a community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Hildreth Subdivision No 3 serve?
Hildreth Subdivision No 3 reports serving 128 people through 42 service connections in Beaverhead County, Montana.
Where does Hildreth Subdivision No 3 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 Hildreth Subdivision No 3 have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 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 Hildreth Subdivision No 3'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, 3 are health-based, and the most recent began in October 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 Hildreth Subdivision No 3's water quality report?
As a community water system, Hildreth Subdivision No 3 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 Beaverhead County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dillon City of | Beaverhead | 4,300 | Community | Groundwater |
| Town Pump Dillon 2 | Beaverhead | 924 | Transient non-community | Groundwater |
| Bannack St Park Visitor Center | Beaverhead | 410 | Transient non-community | Groundwater |
| Maverick Mountain Resort LLC | Beaverhead | 340 | Transient non-community | Groundwater under influence of surface water |
| Keller Subdivision No 2 Hoa | Beaverhead | 300 | Community | Groundwater |
| Hildreth Subdivision No 2 | Beaverhead | 300 | 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, “Hildreth Subdivision No 3, PWSID MT0003968, Montana”, https://aquacensus.com/water-systems/montana/hildreth-subdivision-no-3-mt0003968 (data as of October 1, 2026).