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Community Water System · PWS MT0001791

Mountain Meadows Estates LLP

Billings, Montana 59101 - drinking water served from groundwater sources to 300 people, tracked in EPA SDWIS and UCMR5.

300
People served
172
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 172 drinking-water violations at Mountain Meadows Estates LLP - above the Montana per-system average.

172
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
300
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mountain Meadows Estates LLP

Mountain Meadows Estates LLP is a private-owned community water system that delivers drinking water to 300 residents in Billings, Montana (Gallatin County) through 129 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 172 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 167 monitoring and reporting violations are on file. The most recent violation on record dates to 2014.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 12 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%).

Mountain Meadows Estates LLP's 172 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
300
Total Violations
172
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
129
County
Gallatin
School/Daycare
No
MCL Violations
0
Monitoring Violations
167
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 12 2006
1,2,4-Trichlorobenzene MR 7 2011
Xylenes, Total MR 7 2011
DICHLOROMETHANE MR 7 2011
o-Dichlorobenzene MR 7 2011
p-Dichlorobenzene MR 7 2011
trans-1,2-Dichloroethylene MR 7 2011
1,2-Dichloroethane MR 7 2011
1,1,1-Trichloroethane MR 7 2011
Carbon tetrachloride MR 7 2011
Trichloroethylene MR 7 2011
1,1,2-Trichloroethane MR 7 2011
CHLOROBENZENE MR 7 2011
Toluene MR 7 2011
Styrene MR 7 2011
1,2-Dichloropropane MR 7 2011
Lead and Copper Rule MR 7 2014
cis-1,2-Dichloroethylene MR 7 2011
Vinyl chloride MR 7 2011
Benzene MR 7 2011
Ethylbenzene MR 7 2011
1,1-Dichloroethylene MR 7 2011
Tetrachloroethylene MR 7 2011
Consumer Confidence Rule Other 3 2007
Nitrate MR 1 1994

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 Mountain Meadows Estates LLP.

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 MT0001791 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
2014 Lead and Copper Rule MR 7 SDWIS / MT0001791 / 5000
2011 1,2,4-Trichlorobenzene MR 7 SDWIS / MT0001791 / 2378
2011 Xylenes, Total MR 7 SDWIS / MT0001791 / 2955
2011 DICHLOROMETHANE MR 7 SDWIS / MT0001791 / 2964
2011 o-Dichlorobenzene MR 7 SDWIS / MT0001791 / 2968
2011 p-Dichlorobenzene MR 7 SDWIS / MT0001791 / 2969
2011 trans-1,2-Dichloroethylene MR 7 SDWIS / MT0001791 / 2979
2011 1,2-Dichloroethane MR 7 SDWIS / MT0001791 / 2980
2011 1,1,1-Trichloroethane MR 7 SDWIS / MT0001791 / 2981
2011 Carbon tetrachloride MR 7 SDWIS / MT0001791 / 2982
2011 Trichloroethylene MR 7 SDWIS / MT0001791 / 2984
2011 1,1,2-Trichloroethane MR 7 SDWIS / MT0001791 / 2985
2011 CHLOROBENZENE MR 7 SDWIS / MT0001791 / 2989
2011 Toluene MR 7 SDWIS / MT0001791 / 2991
2011 Styrene MR 7 SDWIS / MT0001791 / 2996

How Mountain Meadows Estates LLP Compares

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

Metric Mountain Meadows Estates LLP Montana avg Federal benchmark
Total violations 172 131.4 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 300 492 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 Mountain Meadows Estates LLP water safe to drink? ▼
Mountain Meadows Estates LLP (PWS ID: MT0001791) has 172 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 300 people using Groundwater sources.
How many people does Mountain Meadows Estates LLP serve? ▼
Mountain Meadows Estates LLP serves 300 people in Billings, Montana. It is a Private-owned system using Groundwater water sources with 129 service connections.
What type of violations does Mountain Meadows Estates LLP have? ▼
Mountain Meadows Estates LLP has 172 total violations: 0 health-based violations (MCL exceedances or treatment failures), 167 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Mountain Meadows Estates LLP water? ▼
No PFAS testing data is available for Mountain Meadows Estates LLP under the EPA's UCMR5 monitoring program.
What water source does Mountain Meadows Estates LLP use? ▼
Mountain Meadows Estates LLP 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.