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Community Water System · PWS MT0000249

Hill County Water Districts

Hingham, Montana 59528 - drinking water served from groundwater sources to 1,720 people, tracked in EPA SDWIS and UCMR5.

1,720
People served
380
EPA violations
75
Health-based
Untested
UCMR5 result

The verdict

EPA records 380 drinking-water violations at Hill County Water Districts, 20% of them health-based - above the Montana per-system average.

380
Total EPA violations on record
20%
Health-based (MCL / treatment failure)
1,720
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Hill County Water Districts

Hill County Water Districts is a local-owned community water system that delivers drinking water to 1,720 residents in Hingham, Montana (Hill County) through 715 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 380 total violations for this system , of which 75 (20%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 298 monitoring and reporting violations are on file. The most recent violation on record dates to 2015.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 34 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Montana, EPA tracks 2,263 public water systems serving 1,112,267 people, with 297,270 cumulative violations and 25,922 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 131.4 violations. Statewide, 28 of 45 UCMR5-tested systems have reported PFAS detections (62.2%).

Hill County Water Districts's 380 violations sit above the Montana average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
1,720
Total Violations
380
Health-Based Violations
75
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
715
County
Hill
School/Daycare
No
MCL Violations
64
Monitoring Violations
298
Treatment Tech Violations
11

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 34 2015
Surface Water Treatment Rule MR 29 2008
Arsenic MR 21 2003
Coliform (TCR) MR 18 1995
Total Haloacetic Acids (HAA5) MCL 18 2007
Total Haloacetic Acids (HAA5) MR 17 2007
TTHM MR 17 2007
Thallium, Total MR 12 2006
Beryllium, Total MR 12 2006
Antimony, Total MR 12 2006
Mercury MR 12 2006
Barium MR 12 2006
Cadmium MR 12 2006
Chromium MR 12 2006
Selenium MR 12 2006
Nickel MR 12 2006
TTHM MCL 12 2007
Surface Water Treatment Rule TT 11 2005
Fluoride MR 9 2003
Nitrate MR 6 1999
Lead and Copper Rule MR 5 2003
Nitrate-Nitrite MR 3 2000
p-Dichlorobenzene MR 3 2000
Vinyl chloride MR 3 2000
1,1-Dichloroethylene MR 3 2000
1,2-Dichloroethane MR 3 2000
1,1,1-Trichloroethane MR 3 2000
Carbon tetrachloride MR 3 2000
1,2-Dichloropropane MR 3 2000
Trichloroethylene MR 3 2000

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Hill County Water Districts.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID MT0000249 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Montana Drinking Water Authority

Montana's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find MT regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2015 Coliform (TCR) MCL 34 SDWIS / MT0000249 / 3100
2008 Surface Water Treatment Rule MR 29 SDWIS / MT0000249 / 0200
2007 Total Haloacetic Acids (HAA5) MCL 18 SDWIS / MT0000249 / 2456
2007 Total Haloacetic Acids (HAA5) MR 17 SDWIS / MT0000249 / 2456
2007 TTHM MR 17 SDWIS / MT0000249 / 2950
2007 TTHM MCL 12 SDWIS / MT0000249 / 2950
2006 Thallium, Total MR 12 SDWIS / MT0000249 / 1085
2006 Beryllium, Total MR 12 SDWIS / MT0000249 / 1075
2006 Antimony, Total MR 12 SDWIS / MT0000249 / 1074
2006 Mercury MR 12 SDWIS / MT0000249 / 1035
2006 Barium MR 12 SDWIS / MT0000249 / 1010
2006 Cadmium MR 12 SDWIS / MT0000249 / 1015
2006 Chromium MR 12 SDWIS / MT0000249 / 1020
2006 Selenium MR 12 SDWIS / MT0000249 / 1045
2006 Nickel MR 12 SDWIS / MT0000249 / 1036

How Hill County Water Districts Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Hill County Water Districts Montana avg Federal benchmark
Total violations 380 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 75 11.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 62.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,720 492 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,263 regulated public water systems in Montana.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Hill County Water Districts water safe to drink? ▼
Hill County Water Districts (PWS ID: MT0000249) has 380 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,720 people using Groundwater sources.
How many people does Hill County Water Districts serve? ▼
Hill County Water Districts serves 1,720 people in Hingham, Montana. It is a Local-owned system using Groundwater water sources with 715 service connections.
What type of violations does Hill County Water Districts have? ▼
Hill County Water Districts has 380 total violations: 75 health-based violations (MCL exceedances or treatment failures), 298 monitoring/reporting violations, and 11 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Hill County Water Districts water? ▼
No PFAS testing data is available for Hill County Water Districts under the EPA's UCMR5 monitoring program.
What water source does Hill County Water Districts use? ▼
Hill County Water Districts uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.