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Transient Non-Community Water System · PWS MT0000331

Silver Gate Water Association Inc

Billings, Montana 59102 - drinking water served from groundwater sources to 40 people, tracked in EPA SDWIS and UCMR5.

40
People served
141
EPA violations
36
Health-based
Untested
UCMR5 result

The verdict

EPA records 141 drinking-water violations at Silver Gate Water Association Inc, 26% of them health-based - above the Montana per-system average.

141
Total EPA violations on record
26%
Health-based (MCL / treatment failure)
40
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Silver Gate Water Association Inc

Silver Gate Water Association Inc is a private-owned transient non-community water system that delivers drinking water to 40 residents in Billings, Montana (Park County) through 34 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 141 total violations for this system , of which 36 (26%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 103 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 66 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%).

Silver Gate Water Association Inc's 141 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
40
Total Violations
141
Health-Based Violations
36
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
34
County
Park
School/Daycare
No
MCL Violations
25
Monitoring Violations
103
Treatment Tech Violations
11

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 66 2015
Coliform (TCR) MCL 25 2002
Revised Total Coliform Rule MON 15 2025
Lead and Copper Rule MR 8 1999
Nitrate MR 7 1999
Nitrate-Nitrite MR 7 2014
Revised Total Coliform Rule TT 6 2022
Surface Water Treatment Rule TT 5 2011
Consumer Confidence Rule Other 2 1999

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 Silver Gate Water Association Inc.

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 MT0000331 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
2025 Revised Total Coliform Rule MON 15 SDWIS / MT0000331 / 8000
2022 Revised Total Coliform Rule TT 6 SDWIS / MT0000331 / 8000
2015 Coliform (TCR) MR 66 SDWIS / MT0000331 / 3100
2014 Nitrate-Nitrite MR 7 SDWIS / MT0000331 / 1038
2011 Surface Water Treatment Rule TT 5 SDWIS / MT0000331 / 0200
2002 Coliform (TCR) MCL 25 SDWIS / MT0000331 / 3100
1999 Lead and Copper Rule MR 8 SDWIS / MT0000331 / 5000
1999 Nitrate MR 7 SDWIS / MT0000331 / 1040
1999 Consumer Confidence Rule Other 2 SDWIS / MT0000331 / 7000

How Silver Gate Water Association Inc Compares

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

Metric Silver Gate Water Association Inc Montana avg Federal benchmark
Total violations 141 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 36 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 40 492 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 Silver Gate Water Association Inc water safe to drink? ▼
Silver Gate Water Association Inc (PWS ID: MT0000331) has 141 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 40 people using Groundwater sources.
How many people does Silver Gate Water Association Inc serve? ▼
Silver Gate Water Association Inc serves 40 people in Billings, Montana. It is a Private-owned system using Groundwater water sources with 34 service connections.
What type of violations does Silver Gate Water Association Inc have? ▼
Silver Gate Water Association Inc has 141 total violations: 36 health-based violations (MCL exceedances or treatment failures), 103 monitoring/reporting violations, and 11 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Silver Gate Water Association Inc water? ▼
No PFAS testing data is available for Silver Gate Water Association Inc under the EPA's UCMR5 monitoring program.
What water source does Silver Gate Water Association Inc use? ▼
Silver Gate Water Association Inc uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.