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States → EPA Region 8 — Tribal Water Systems

Community Water System · PWS 083090009

Heart Butte School

Heart Butte, EPA Region 8 — Tribal Water Systems 59448 - drinking water served from surface water sources to 250 people, tracked in EPA SDWIS and UCMR5.

250
People served
218
EPA violations
19
Health-based
Untested
UCMR5 result

The verdict

EPA records 218 drinking-water violations at Heart Butte School, 9% of them health-based.

218
Total EPA violations on record
9%
Health-based (MCL / treatment failure)
250
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Heart Butte School

Heart Butte School is a native american-owned community water system that delivers drinking water to 250 residents in Heart Butte, EPA Region 8 — Tribal Water Systems through 18 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 218 total violations for this system , of which 19 (9%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 189 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Revised Total Coliform Rule, recorded in 14 violations (MON). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 8 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

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
250
Total Violations
218
Health-Based Violations
19
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Native American
Connections
18
School/Daycare
No
MCL Violations
4
Monitoring Violations
189
Treatment Tech Violations
15

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Revised Total Coliform Rule MON 14 2024
Total Haloacetic Acids (HAA5) MR 12 2022
Surface Water Treatment Rule TT 12 2018
TTHM MR 12 2022
Coliform (TCR) MR 11 2012
Chlorine MR 10 2012
Consumer Confidence Rule Other 8 2023
Surface Water Treatment Rule MR 5 2024
Coliform (TCR) MCL 4 2015
CYANIDE MR 4 2020
E. COLI MR 3 2017
Revised Total Coliform Rule TT 3 2024
Cadmium MR 2 2014
Fluoride MR 2 2014
Beryllium, Total MR 2 2014
Barium MR 2 2014
Nickel MR 2 2014
Mercury MR 2 2014
Arsenic MR 2 2014
cis-1,2-Dichloroethylene MR 2 2014
Vinyl chloride MR 2 2014
1,1-Dichloroethylene MR 2 2014
1,1,1-Trichloroethane MR 2 2014
Tetrachloroethylene MR 2 2014
Benzene MR 2 2014
Styrene MR 2 2014
Dinoseb MR 2 2014
Heptachlor epoxide MR 2 2014
BHC-GAMMA MR 2 2014
Pentachlorophenol MR 2 2014

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 Heart Butte School.

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 083090009 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 8 — Tribal Water Systems Drinking Water Authority

EPA Region 8 — Tribal Water Systems'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 08 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
2024 Revised Total Coliform Rule MON 14 SDWIS / 083090009 / 8000
2024 Surface Water Treatment Rule MR 5 SDWIS / 083090009 / 0200
2024 Revised Total Coliform Rule TT 3 SDWIS / 083090009 / 8000
2023 Consumer Confidence Rule Other 8 SDWIS / 083090009 / 7000
2022 Total Haloacetic Acids (HAA5) MR 12 SDWIS / 083090009 / 2456
2022 TTHM MR 12 SDWIS / 083090009 / 2950
2021 Lead and Copper Rule MR 2 SDWIS / 083090009 / 5000
2020 CYANIDE MR 4 SDWIS / 083090009 / 1024
2018 Surface Water Treatment Rule TT 12 SDWIS / 083090009 / 0200
2017 E. COLI MR 3 SDWIS / 083090009 / 3014
2015 Coliform (TCR) MCL 4 SDWIS / 083090009 / 3100
2015 Combined Uranium MR 2 SDWIS / 083090009 / 4006
2015 Radium-226 MR 1 SDWIS / 083090009 / 4020
2015 Combined Radium (-226 and -228) MR 1 SDWIS / 083090009 / 4010
2015 Radium-228 MR 1 SDWIS / 083090009 / 4030

How Heart Butte School Compares

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

Metric Heart Butte School EPA Region 8 — Tribal Water Systems avg Federal benchmark
Total violations 218 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 19 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 250 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 8 — Tribal Water Systems.

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 Heart Butte School water safe to drink? ▼
Heart Butte School (PWS ID: 083090009) has 218 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 250 people using Surface Water sources.
How many people does Heart Butte School serve? ▼
Heart Butte School serves 250 people in Heart Butte, EPA Region 8 — Tribal Water Systems. It is a Native American-owned system using Surface Water water sources with 18 service connections.
What type of violations does Heart Butte School have? ▼
Heart Butte School has 218 total violations: 19 health-based violations (MCL exceedances or treatment failures), 189 monitoring/reporting violations, and 15 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Heart Butte School water? ▼
No PFAS testing data is available for Heart Butte School under the EPA's UCMR5 monitoring program.
What water source does Heart Butte School use? ▼
Heart Butte School uses Surface Water 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.