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Community Water System · PWS MT0000290

Melstone Town Of

Melstone, Montana 59054 - drinking water served from groundwater sources to 170 people, tracked in EPA SDWIS and UCMR5.

170
People served
440
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 440 drinking-water violations at Melstone Town Of, 1% of them health-based - above the Montana per-system average.

440
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
170
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Melstone Town Of

Melstone Town Of is a local-owned community water system that delivers drinking water to 170 residents in Melstone, Montana (Musselshell County) through 92 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 440 total violations for this system , of which 4 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 415 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 94 violations (MR). 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%).

Melstone Town Of's 440 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
170
Total Violations
440
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
92
County
Musselshell
School/Daycare
No
MCL Violations
0
Monitoring Violations
415
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 94 2007
CARBON, TOTAL MR 60 2004
Interim Enhanced Surface Water Treatment Rule MR 47 2007
TTHM MR 29 2016
Total Haloacetic Acids (HAA5) MR 29 2016
Groundwater Rule MR 13 2021
Consumer Confidence Rule Other 12 2018
Lead and Copper Rule MR 11 2024
Coliform (TCR) MR 8 2014
Gross Alpha, Excl. Radon and U MR 6 2012
Combined Radium (-226 and -228) MR 6 2012
CARBON, TOTAL TT 4 2011
Endrin MR 3 2013
BHC-GAMMA MR 3 2013
Methoxychlor MR 3 2013
Toxaphene MR 3 2013
Di(2-ethylhexyl) adipate MR 3 2013
Simazine MR 3 2013
Dinoseb MR 3 2013
Hexachlorocyclopentadiene MR 3 2013
Aldicarb sulfone MR 3 2013
Carbofuran MR 3 2013
LASSO MR 3 2013
Heptachlor MR 3 2013
Heptachlor epoxide MR 3 2013
2,4-D MR 3 2013
HEXACHLOROBENZENE MR 3 2013
Benzo(a)pyrene MR 3 2013
Pentachlorophenol MR 3 2013
Chlordane MR 3 2013

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 Melstone Town Of.

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 MT0000290 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
2024 Lead and Copper Rule MR 11 SDWIS / MT0000290 / 5000
2021 Groundwater Rule MR 13 SDWIS / MT0000290 / 0700
2018 Consumer Confidence Rule Other 12 SDWIS / MT0000290 / 7000
2016 TTHM MR 29 SDWIS / MT0000290 / 2950
2016 Total Haloacetic Acids (HAA5) MR 29 SDWIS / MT0000290 / 2456
2014 Coliform (TCR) MR 8 SDWIS / MT0000290 / 3100
2013 Endrin MR 3 SDWIS / MT0000290 / 2005
2013 BHC-GAMMA MR 3 SDWIS / MT0000290 / 2010
2013 Methoxychlor MR 3 SDWIS / MT0000290 / 2015
2013 Toxaphene MR 3 SDWIS / MT0000290 / 2020
2013 Di(2-ethylhexyl) adipate MR 3 SDWIS / MT0000290 / 2035
2013 Simazine MR 3 SDWIS / MT0000290 / 2037
2013 Dinoseb MR 3 SDWIS / MT0000290 / 2041
2013 Hexachlorocyclopentadiene MR 3 SDWIS / MT0000290 / 2042
2013 Aldicarb sulfone MR 3 SDWIS / MT0000290 / 2044

How Melstone Town Of Compares

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

Metric Melstone Town Of Montana avg Federal benchmark
Total violations 440 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 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 170 492 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 Melstone Town Of water safe to drink? ▼
Melstone Town Of (PWS ID: MT0000290) has 440 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 170 people using Groundwater sources.
How many people does Melstone Town Of serve? ▼
Melstone Town Of serves 170 people in Melstone, Montana. It is a Local-owned system using Groundwater water sources with 92 service connections.
What type of violations does Melstone Town Of have? ▼
Melstone Town Of has 440 total violations: 4 health-based violations (MCL exceedances or treatment failures), 415 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Melstone Town Of water? ▼
No PFAS testing data is available for Melstone Town Of under the EPA's UCMR5 monitoring program.
What water source does Melstone Town Of use? ▼
Melstone Town Of 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.