Community Water System · PWS 090400049
Dishchii Bikoh Community School - BIA Charter
Operator location White River, EPA Region 9 — Tribal Water Systems - smaller served population (≤ 999) at 622 people served; 392 SDWIS violations on record from groundwater sources.
- 622
- People served (this PWS) Smaller third of systems
- 392
- EPA violations (this PWS) Upper third of systems
- 30
- Health-based (this PWS) Middle third by health-based share
- Untested
- UCMR5 (this PWS) No UCMR5 result
Dishchii Bikoh Community School - BIA Charter standing, high SDWIS violation third
622 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 8% is middle-third health share (≤ 23%). Population rank #25,739 of 29,740 among systems serving 500+.
The verdict
Dishchii Bikoh Community School - BIA Charter sits in the upper third of the sitemap cohort by violation count (392), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (622; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 8% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #25,739 of 29,740
- Population · /systems
- #114 of 129
- Population · 09
- 392
- Total EPA violations on record
- 8%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 41
- School/Daycare
- Yes
- MCL Violations
- 30
- Monitoring Violations
- 310
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 54 | 2016 |
| Coliform (TCR) | MCL | 16 | 2015 |
| Arsenic | MCL | 14 | 2011 |
| Arsenic | MR | 14 | 2010 |
| Nitrate | MR | 14 | 2009 |
| Lead and Copper Rule | MR | 13 | 2023 |
| Chlorine | MR | 7 | 2024 |
| CYANIDE | MR | 4 | 2005 |
| Selenium | MR | 4 | 2005 |
| Methoxychlor | MR | 4 | 2005 |
| Dalapon | MR | 4 | 2005 |
| Glyphosate | MR | 4 | 2005 |
| Di(2-ethylhexyl) phthalate | MR | 4 | 2005 |
| Dinoseb | MR | 4 | 2005 |
| Heptachlor | MR | 4 | 2005 |
| Heptachlor epoxide | MR | 4 | 2005 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 4 | 2005 |
| DICHLOROMETHANE | MR | 4 | 2005 |
| p-Dichlorobenzene | MR | 4 | 2005 |
| Ethylbenzene | MR | 4 | 2005 |
| Barium | MR | 3 | 2005 |
| Cadmium | MR | 3 | 2005 |
| Chromium | MR | 3 | 2005 |
| Fluoride | MR | 3 | 2005 |
| Thallium, Total | MR | 3 | 2005 |
| Endrin | MR | 3 | 2005 |
| BHC-GAMMA | MR | 3 | 2005 |
| Toxaphene | MR | 3 | 2005 |
| Diquat | MR | 3 | 2005 |
| Endothall | MR | 3 | 2005 |
Violation Count vs. the National Corpus
Dishchii Bikoh Community School - BIA Charter has 392 recorded EPA violations, 93% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 6% carry more. 8% of this system's own violations are health-based (30 of 392), and it ranks #25,739 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
392 Higher than most more violations than 93% 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
How many violations vs. how serious, among peer systems
Dishchii Bikoh Community School - BIA Charter plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.
Violation volume vs. health-based share
Population served record for Dishchii Bikoh Community School - BIA Charter
EPA SDWIS lists 622 people served and 41 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
392 violations · 622 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.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Dishchii Bikoh Community School - BIA Charter
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in EPA Region 9 — Tribal Water Systems compares on the same EPA violation measures. EPA Region 9 — 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.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.