Community Water System · PWS 083090009
Heart Butte School
Operator location Heart Butte, EPA Region 8 — Tribal Water Systems - smaller served population (≤ 999) at 250 people served; 218 SDWIS violations on record from surface water sources.
- 250
- People served (this PWS)
- 218
- EPA violations (this PWS)
- 19
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Heart Butte School standing, high SDWIS violation third
250 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 9% is middle-third health share (≤ 23%).
The verdict
Heart Butte School sits in the upper third of the sitemap cohort by violation count (218), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (250; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 9% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 218
- Total EPA violations on record
- 9%
- Health-based (MCL / treatment failure)
- 250
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
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 |
Violation Count vs. the National Corpus
Heart Butte School has 218 recorded EPA violations, 87% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 13% carry more. 9% of this system's own violations are health-based (19 of 218), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
218 Higher than most more violations than 87% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Population served record for Heart Butte School
EPA SDWIS lists 250 people served and 18 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
218 violations · 250 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Heart Butte School
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in EPA Region 8 — Tribal Water Systems compares on the same EPA violation measures. EPA Region 8 — Tribal Water Systems systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.