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Community Water System · PWS MT0002927

Wells Garden Estates

Billings, Montana 59101 - drinking water served from groundwater sources to 240 people, tracked in EPA SDWIS and UCMR5.

240
People served
280
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 280 drinking-water violations at Wells Garden Estates - above the Montana per-system average.

280
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
240
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Wells Garden Estates

Wells Garden Estates is a private-owned community water system that delivers drinking water to 240 residents in Billings, Montana (Yellowstone County) through 147 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 280 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 274 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, 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%).

Wells Garden Estates's 280 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
240
Total Violations
280
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
147
County
Yellowstone
School/Daycare
No
MCL Violations
0
Monitoring Violations
274
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 12 2008
Xylenes, Total MR 12 2008
o-Dichlorobenzene MR 12 2008
p-Dichlorobenzene MR 12 2008
Vinyl chloride MR 12 2008
1,1,1-Trichloroethane MR 12 2008
1,2-Dichloroethane MR 12 2008
Tetrachloroethylene MR 12 2008
CHLOROBENZENE MR 12 2008
Toluene MR 12 2008
Ethylbenzene MR 12 2008
Styrene MR 12 2008
cis-1,2-Dichloroethylene MR 12 2008
DICHLOROMETHANE MR 12 2008
1,1-Dichloroethylene MR 12 2008
trans-1,2-Dichloroethylene MR 12 2008
Carbon tetrachloride MR 12 2008
1,2-Dichloropropane MR 12 2008
Trichloroethylene MR 12 2008
1,1,2-Trichloroethane MR 12 2008
Benzene MR 12 2008
Lead and Copper Rule MR 6 2014
Nitrate-Nitrite MR 6 2017
Consumer Confidence Rule Other 4 2023
E. COLI MR 3 2023
Arsenic MR 3 2002
Nitrate MR 3 1999
Coliform (TCR) MR 1 1997

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 Wells Garden Estates.

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 MT0002927 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
2023 Consumer Confidence Rule Other 4 SDWIS / MT0002927 / 7000
2023 E. COLI MR 3 SDWIS / MT0002927 / 3014
2017 Nitrate-Nitrite MR 6 SDWIS / MT0002927 / 1038
2014 Lead and Copper Rule MR 6 SDWIS / MT0002927 / 5000
2008 1,2,4-Trichlorobenzene MR 12 SDWIS / MT0002927 / 2378
2008 Xylenes, Total MR 12 SDWIS / MT0002927 / 2955
2008 o-Dichlorobenzene MR 12 SDWIS / MT0002927 / 2968
2008 p-Dichlorobenzene MR 12 SDWIS / MT0002927 / 2969
2008 Vinyl chloride MR 12 SDWIS / MT0002927 / 2976
2008 1,1,1-Trichloroethane MR 12 SDWIS / MT0002927 / 2981
2008 1,2-Dichloroethane MR 12 SDWIS / MT0002927 / 2980
2008 Tetrachloroethylene MR 12 SDWIS / MT0002927 / 2987
2008 CHLOROBENZENE MR 12 SDWIS / MT0002927 / 2989
2008 Toluene MR 12 SDWIS / MT0002927 / 2991
2008 Ethylbenzene MR 12 SDWIS / MT0002927 / 2992

How Wells Garden Estates Compares

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

Metric Wells Garden Estates Montana avg Federal benchmark
Total violations 280 131.4 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 240 492 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 Wells Garden Estates water safe to drink? ▼
Wells Garden Estates (PWS ID: MT0002927) has 280 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 240 people using Groundwater sources.
How many people does Wells Garden Estates serve? ▼
Wells Garden Estates serves 240 people in Billings, Montana. It is a Private-owned system using Groundwater water sources with 147 service connections.
What type of violations does Wells Garden Estates have? ▼
Wells Garden Estates has 280 total violations: 0 health-based violations (MCL exceedances or treatment failures), 274 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Wells Garden Estates water? ▼
No PFAS testing data is available for Wells Garden Estates under the EPA's UCMR5 monitoring program.
What water source does Wells Garden Estates use? ▼
Wells Garden Estates 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.