PlainWater
States → Montana

Community Water System · PWS MT0000322

Ryegate Town Of

Ryegate, Montana 59074 - drinking water served from groundwater sources to 270 people, tracked in EPA SDWIS and UCMR5.

270
People served
1,301
EPA violations
36
Health-based
Untested
UCMR5 result

The verdict

EPA records 1,301 drinking-water violations at Ryegate Town Of, 3% of them health-based - above the Montana per-system average.

1,301
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
270
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ryegate Town Of

Ryegate Town Of is a local-owned community water system that delivers drinking water to 270 residents in Ryegate, Montana (Golden Valley County) through 116 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 1,301 total violations for this system , of which 36 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 1,254 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 Lead and Copper Rule, recorded in 156 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%).

Ryegate Town Of's 1,301 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
270
Total Violations
1,301
Health-Based Violations
36
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
116
County
Golden Valley
School/Daycare
No
MCL Violations
7
Monitoring Violations
1,254
Treatment Tech Violations
29

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 156 2024
1,2,4-Trichlorobenzene MR 33 2012
cis-1,2-Dichloroethylene MR 33 2012
Xylenes, Total MR 33 2012
DICHLOROMETHANE MR 33 2012
1,1-Dichloroethylene MR 33 2012
1,2-Dichloroethane MR 33 2012
1,2-Dichloropropane MR 33 2012
Tetrachloroethylene MR 33 2012
CHLOROBENZENE MR 33 2012
Toluene MR 33 2012
Ethylbenzene MR 33 2012
Styrene MR 33 2012
o-Dichlorobenzene MR 33 2012
p-Dichlorobenzene MR 33 2012
trans-1,2-Dichloroethylene MR 33 2012
1,1,1-Trichloroethane MR 33 2012
Benzene MR 33 2012
Carbon tetrachloride MR 33 2012
Vinyl chloride MR 33 2012
1,1,2-Trichloroethane MR 33 2012
Trichloroethylene MR 33 2012
Nitrate-Nitrite MR 27 2006
Groundwater Rule TT 20 2024
Fluoride MR 19 2009
Arsenic MR 16 2008
Barium MR 16 2008
Chromium MR 16 2008
Mercury MR 16 2008
Antimony, Total MR 16 2008

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 Ryegate Town Of.

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 MT0000322 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 TTHM MR 15 SDWIS / MT0000322 / 2950
2025 Total Haloacetic Acids (HAA5) MR 12 SDWIS / MT0000322 / 2456
2025 Groundwater Rule MR 9 SDWIS / MT0000322 / 0700
2024 Lead and Copper Rule MR 156 SDWIS / MT0000322 / 5000
2024 Groundwater Rule TT 20 SDWIS / MT0000322 / 0700
2012 1,2,4-Trichlorobenzene MR 33 SDWIS / MT0000322 / 2378
2012 cis-1,2-Dichloroethylene MR 33 SDWIS / MT0000322 / 2380
2012 Xylenes, Total MR 33 SDWIS / MT0000322 / 2955
2012 DICHLOROMETHANE MR 33 SDWIS / MT0000322 / 2964
2012 1,1-Dichloroethylene MR 33 SDWIS / MT0000322 / 2977
2012 1,2-Dichloroethane MR 33 SDWIS / MT0000322 / 2980
2012 1,2-Dichloropropane MR 33 SDWIS / MT0000322 / 2983
2012 Tetrachloroethylene MR 33 SDWIS / MT0000322 / 2987
2012 CHLOROBENZENE MR 33 SDWIS / MT0000322 / 2989
2012 Toluene MR 33 SDWIS / MT0000322 / 2991

How Ryegate Town Of Compares

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

Metric Ryegate Town Of Montana avg Federal benchmark
Total violations 1,301 131.4 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 270 492 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 Ryegate Town Of water safe to drink? ▼
Ryegate Town Of (PWS ID: MT0000322) has 1301 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 270 people using Groundwater sources.
How many people does Ryegate Town Of serve? ▼
Ryegate Town Of serves 270 people in Ryegate, Montana. It is a Local-owned system using Groundwater water sources with 116 service connections.
What type of violations does Ryegate Town Of have? ▼
Ryegate Town Of has 1,301 total violations: 36 health-based violations (MCL exceedances or treatment failures), 1,254 monitoring/reporting violations, and 29 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ryegate Town Of water? ▼
No PFAS testing data is available for Ryegate Town Of under the EPA's UCMR5 monitoring program.
What water source does Ryegate Town Of use? ▼
Ryegate Town Of 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.