PlainWater
States → Montana

Community Water System · PWS MT0002738

Casitas del Mesa MHP

Glendive, Montana 59330 - drinking water served from groundwater sources to 180 people, tracked in EPA SDWIS and UCMR5.

180
People served
775
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 775 drinking-water violations at Casitas del Mesa MHP - above the Montana per-system average.

775
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
180
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Casitas del Mesa MHP

Casitas del Mesa MHP is a private-owned community water system that delivers drinking water to 180 residents in Glendive, Montana (Dawson County) through 68 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 775 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 773 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 BHC-GAMMA, recorded in 27 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%).

Casitas del Mesa MHP's 775 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
180
Total Violations
775
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
68
County
Dawson
School/Daycare
No
MCL Violations
0
Monitoring Violations
773
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
BHC-GAMMA MR 27 2020
Methoxychlor MR 27 2020
Toxaphene MR 27 2020
Di(2-ethylhexyl) adipate MR 27 2020
Simazine MR 27 2020
Di(2-ethylhexyl) phthalate MR 27 2020
Dinoseb MR 27 2020
Hexachlorocyclopentadiene MR 27 2020
Atrazine MR 27 2020
Heptachlor epoxide MR 27 2020
2,4-D MR 27 2020
Benzo(a)pyrene MR 27 2020
2,4,5-TP MR 27 2020
Picloram MR 27 2020
OXAMYL MR 27 2020
Carbofuran MR 27 2020
LASSO MR 27 2020
Endrin MR 27 2020
Dalapon MR 27 2020
HEXACHLOROBENZENE MR 27 2020
Pentachlorophenol MR 27 2020
Chlordane MR 27 2020
Heptachlor MR 27 2020
Combined Radium (-226 and -228) MR 9 2014
Gross Alpha, Excl. Radon and U MR 9 2014
Lead and Copper Rule MR 8 2024
Coliform (TCR) MR 7 2015
Nitrate-Nitrite MR 7 2022
Arsenic MR 4 2011
E. COLI MR 4 2019

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 Casitas del Mesa MHP.

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 MT0002738 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 8 SDWIS / MT0002738 / 5000
2022 Nitrate-Nitrite MR 7 SDWIS / MT0002738 / 1038
2020 BHC-GAMMA MR 27 SDWIS / MT0002738 / 2010
2020 Methoxychlor MR 27 SDWIS / MT0002738 / 2015
2020 Toxaphene MR 27 SDWIS / MT0002738 / 2020
2020 Di(2-ethylhexyl) adipate MR 27 SDWIS / MT0002738 / 2035
2020 Simazine MR 27 SDWIS / MT0002738 / 2037
2020 Di(2-ethylhexyl) phthalate MR 27 SDWIS / MT0002738 / 2039
2020 Dinoseb MR 27 SDWIS / MT0002738 / 2041
2020 Hexachlorocyclopentadiene MR 27 SDWIS / MT0002738 / 2042
2020 Atrazine MR 27 SDWIS / MT0002738 / 2050
2020 Heptachlor epoxide MR 27 SDWIS / MT0002738 / 2067
2020 2,4-D MR 27 SDWIS / MT0002738 / 2105
2020 Benzo(a)pyrene MR 27 SDWIS / MT0002738 / 2306
2020 2,4,5-TP MR 27 SDWIS / MT0002738 / 2110

How Casitas del Mesa MHP Compares

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

Metric Casitas del Mesa MHP Montana avg Federal benchmark
Total violations 775 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 180 492 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 Casitas del Mesa MHP water safe to drink? ▼
Casitas del Mesa MHP (PWS ID: MT0002738) has 775 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 180 people using Groundwater sources.
How many people does Casitas del Mesa MHP serve? ▼
Casitas del Mesa MHP serves 180 people in Glendive, Montana. It is a Private-owned system using Groundwater water sources with 68 service connections.
What type of violations does Casitas del Mesa MHP have? ▼
Casitas del Mesa MHP has 775 total violations: 0 health-based violations (MCL exceedances or treatment failures), 773 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Casitas del Mesa MHP water? ▼
No PFAS testing data is available for Casitas del Mesa MHP under the EPA's UCMR5 monitoring program.
What water source does Casitas del Mesa MHP use? ▼
Casitas del Mesa MHP 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.