Transient Non-Community Water System · PWS MT0000511

Longbranch Casino

Ballantine, Montana 59006 - drinking water served from groundwater sources to 120 people, tracked in EPA SDWIS and UCMR5.

Compiled by PlainWater Editorial, Drinking Water Quality Editorial Team · May 15, 2026

120
People served: 621
EPA violations: 29
Health-based: Untested
UCMR5 result

The verdict

EPA records 621 drinking-water violations at Longbranch Casino, 5% of them health-based - above the Montana per-system average.

621
Total EPA violations on record: 5%
Health-based (MCL / treatment failure): 120
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Longbranch Casino

Longbranch Casino is a private-owned transient non-community water system that delivers drinking water to 120 residents in Ballantine, Montana (Yellowstone County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 621 total violations for this system , of which 29 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 588 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 182 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%).

Longbranch Casino's 621 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

120

Total Violations

621

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Transient Non-Community
Owner Type: Private
Connections: 1
County: Yellowstone
School/Daycare: No
MCL Violations: 29
Monitoring Violations: 588
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Coliform (TCR)	MR	182	2012
Nitrate-Nitrite	MR	26	2022
Nitrate-Nitrite	MCL	25	2005
cis-1,2-Dichloroethylene	MR	17	2005
o-Dichlorobenzene	MR	17	2005
Vinyl chloride	MR	17	2005
1,2-Dichloroethane	MR	17	2005
1,1,1-Trichloroethane	MR	17	2005
Carbon tetrachloride	MR	17	2005
Trichloroethylene	MR	17	2005
Tetrachloroethylene	MR	17	2005
Ethylbenzene	MR	17	2005
Styrene	MR	17	2005
1,2,4-Trichlorobenzene	MR	17	2005
Xylenes, Total	MR	17	2005
p-Dichlorobenzene	MR	17	2005
trans-1,2-Dichloroethylene	MR	17	2005
1,1,2-Trichloroethane	MR	17	2005
CHLOROBENZENE	MR	17	2005
1,1-Dichloroethylene	MR	17	2005
Benzene	MR	17	2005
Toluene	MR	17	2005
DICHLOROMETHANE	MR	17	2005
1,2-Dichloropropane	MR	17	2005
Lead and Copper Rule	MR	10	2006
Nitrate	MR	10	1994
Nitrate	MCL	4	1997
Revised Total Coliform Rule	MON	3	2018

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 Longbranch Casino.

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 MT0000511 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
2022	Nitrate-Nitrite	MR	26	SDWIS / MT0000511 / 1038
2018	Revised Total Coliform Rule	MON	3	SDWIS / MT0000511 / 8000
2012	Coliform (TCR)	MR	182	SDWIS / MT0000511 / 3100
2006	Lead and Copper Rule	MR	10	SDWIS / MT0000511 / 5000
2005	Nitrate-Nitrite	MCL	25	SDWIS / MT0000511 / 1038
2005	cis-1,2-Dichloroethylene	MR	17	SDWIS / MT0000511 / 2380
2005	o-Dichlorobenzene	MR	17	SDWIS / MT0000511 / 2968
2005	Vinyl chloride	MR	17	SDWIS / MT0000511 / 2976
2005	1,2-Dichloroethane	MR	17	SDWIS / MT0000511 / 2980
2005	1,1,1-Trichloroethane	MR	17	SDWIS / MT0000511 / 2981
2005	Carbon tetrachloride	MR	17	SDWIS / MT0000511 / 2982
2005	Trichloroethylene	MR	17	SDWIS / MT0000511 / 2984
2005	Tetrachloroethylene	MR	17	SDWIS / MT0000511 / 2987
2005	Ethylbenzene	MR	17	SDWIS / MT0000511 / 2992
2005	Styrene	MR	17	SDWIS / MT0000511 / 2996

How Longbranch Casino Compares

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

Metric	Longbranch Casino	Montana avg	Federal benchmark
Total violations	621	131.4	SDWA compliance, any non-zero count is a recorded breach
Health-based violations	29	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	120	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 Longbranch Casino water safe to drink? ▼

Longbranch Casino (PWS ID: MT0000511) has 621 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 120 people using Groundwater sources.

How many people does Longbranch Casino serve? ▼

Longbranch Casino serves 120 people in Ballantine, Montana. It is a Private-owned system using Groundwater water sources with 1 service connections.

What type of violations does Longbranch Casino have? ▼

Longbranch Casino has 621 total violations: 29 health-based violations (MCL exceedances or treatment failures), 588 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Longbranch Casino water? ▼

No PFAS testing data is available for Longbranch Casino under the EPA's UCMR5 monitoring program.

What water source does Longbranch Casino use? ▼

Longbranch Casino 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.