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Community Water System · PWS MT0004202

Antler Ridge Homeowners Association

Belgrade, Montana 59714 - drinking water served from groundwater sources to 50 people, tracked in EPA SDWIS and UCMR5.

50
People served
694
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 694 drinking-water violations at Antler Ridge Homeowners Association - above the Montana per-system average.

694
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
50
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Antler Ridge Homeowners Association

Antler Ridge Homeowners Association is a private-owned community water system that delivers drinking water to 50 residents in Belgrade, Montana (Gallatin County) through 35 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 694 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 690 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Gross Alpha, Excl. Radon and U, recorded in 30 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, 5 of 45 UCMR5-tested systems have reported PFAS detections (11.1%).

Antler Ridge Homeowners Association's 694 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
50
Total Violations
694
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
35
County
Gallatin
School/Daycare
No
MCL Violations
0
Monitoring Violations
690
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Gross Alpha, Excl. Radon and U MR 30 2020
LASSO MR 24 2013
2,4,5-TP MR 24 2013
Benzo(a)pyrene MR 24 2013
Chlordane MR 24 2013
Endrin MR 24 2013
Methoxychlor MR 24 2013
Toxaphene MR 24 2013
Picloram MR 24 2013
Dalapon MR 24 2013
Di(2-ethylhexyl) adipate MR 24 2013
OXAMYL MR 24 2013
Dinoseb MR 24 2013
Aldicarb sulfone MR 24 2013
Aldicarb MR 24 2013
Atrazine MR 24 2013
Heptachlor MR 24 2013
Heptachlor epoxide MR 24 2013
HEXACHLOROBENZENE MR 24 2013
Pentachlorophenol MR 24 2013
Aldicarb sulfoxide MR 24 2013
BHC-GAMMA MR 24 2013
Simazine MR 24 2013
Carbofuran MR 24 2013
2,4-D MR 24 2013
Di(2-ethylhexyl) phthalate MR 24 2013
Hexachlorocyclopentadiene MR 24 2013
Combined Radium (-226 and -228) MR 23 2013
Coliform (TCR) MR 6 2015
Consumer Confidence Rule Other 4 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 Antler Ridge Homeowners Association.

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 MT0004202 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
2020 Gross Alpha, Excl. Radon and U MR 30 SDWIS / MT0004202 / 4000
2019 E. COLI MR 3 SDWIS / MT0004202 / 3014
2018 Revised Total Coliform Rule MON 4 SDWIS / MT0004202 / 8000
2015 Coliform (TCR) MR 6 SDWIS / MT0004202 / 3100
2013 LASSO MR 24 SDWIS / MT0004202 / 2051
2013 2,4,5-TP MR 24 SDWIS / MT0004202 / 2110
2013 Benzo(a)pyrene MR 24 SDWIS / MT0004202 / 2306
2013 Chlordane MR 24 SDWIS / MT0004202 / 2959
2013 Endrin MR 24 SDWIS / MT0004202 / 2005
2013 Methoxychlor MR 24 SDWIS / MT0004202 / 2015
2013 Toxaphene MR 24 SDWIS / MT0004202 / 2020
2013 Picloram MR 24 SDWIS / MT0004202 / 2040
2013 Dalapon MR 24 SDWIS / MT0004202 / 2031
2013 Di(2-ethylhexyl) adipate MR 24 SDWIS / MT0004202 / 2035
2013 OXAMYL MR 24 SDWIS / MT0004202 / 2036

How Antler Ridge Homeowners Association Compares

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

Metric Antler Ridge Homeowners Association Montana avg Federal benchmark
Total violations 694 131.4 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 11.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 50 492 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 Antler Ridge Homeowners Association water safe to drink? ▼
Antler Ridge Homeowners Association (PWS ID: MT0004202) has 694 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 50 people using Groundwater sources.
How many people does Antler Ridge Homeowners Association serve? ▼
Antler Ridge Homeowners Association serves 50 people in Belgrade, Montana. It is a Private-owned system using Groundwater water sources with 35 service connections.
What type of violations does Antler Ridge Homeowners Association have? ▼
Antler Ridge Homeowners Association has 694 total violations: 0 health-based violations (MCL exceedances or treatment failures), 690 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Antler Ridge Homeowners Association water? ▼
No PFAS testing data is available for Antler Ridge Homeowners Association under the EPA's UCMR5 monitoring program.
What water source does Antler Ridge Homeowners Association use? ▼
Antler Ridge Homeowners Association 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.