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Non-Transient Non-Community Water System · PWS MT0001288

Gallatin Gateway School Dist 35

Gallatin Gateway, Montana 59730 - drinking water served from groundwater sources to 202 people, tracked in EPA SDWIS and UCMR5.

202
People served
63
EPA violations
8
Health-based
Untested
UCMR5 result

The verdict

EPA records 63 drinking-water violations at Gallatin Gateway School Dist 35, 13% of them health-based - below the Montana per-system average.

63
Total EPA violations on record
13%
Health-based (MCL / treatment failure)
202
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Gallatin Gateway School Dist 35

Gallatin Gateway School Dist 35 is a state-owned non-transient non-community water system that delivers drinking water to 202 residents in Gallatin Gateway, Montana (Gallatin County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 63 total violations for this system , of which 8 (13%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 55 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 Lead and Copper Rule, recorded in 21 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%).

Gallatin Gateway School Dist 35's 63 violations sit below 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
202
Total Violations
63
Health-Based Violations
8
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
State
Connections
1
County
Gallatin
School/Daycare
Yes
MCL Violations
8
Monitoring Violations
55
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 21 2009
Pentachlorophenol MR 19 2020
Coliform (TCR) MR 14 2000
Coliform (TCR) MCL 4 1995
Revised Total Coliform Rule MCL 4 2019
Nitrate MR 1 1993

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 Gallatin Gateway School Dist 35.

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 MT0001288 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 Pentachlorophenol MR 19 SDWIS / MT0001288 / 2326
2019 Revised Total Coliform Rule MCL 4 SDWIS / MT0001288 / 8000
2009 Lead and Copper Rule MR 21 SDWIS / MT0001288 / 5000
2000 Coliform (TCR) MR 14 SDWIS / MT0001288 / 3100
1995 Coliform (TCR) MCL 4 SDWIS / MT0001288 / 3100
1993 Nitrate MR 1 SDWIS / MT0001288 / 1040

How Gallatin Gateway School Dist 35 Compares

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

Metric Gallatin Gateway School Dist 35 Montana avg Federal benchmark
Total violations 63 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 8 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 202 492 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 Gallatin Gateway School Dist 35 water safe to drink? ▼
Gallatin Gateway School Dist 35 (PWS ID: MT0001288) has 63 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 202 people using Groundwater sources.
How many people does Gallatin Gateway School Dist 35 serve? ▼
Gallatin Gateway School Dist 35 serves 202 people in Gallatin Gateway, Montana. It is a State-owned system using Groundwater water sources with 1 service connections.
What type of violations does Gallatin Gateway School Dist 35 have? ▼
Gallatin Gateway School Dist 35 has 63 total violations: 8 health-based violations (MCL exceedances or treatment failures), 55 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Gallatin Gateway School Dist 35 water? ▼
No PFAS testing data is available for Gallatin Gateway School Dist 35 under the EPA's UCMR5 monitoring program.
What water source does Gallatin Gateway School Dist 35 use? ▼
Gallatin Gateway School Dist 35 uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.