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States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 090400049

Dishchii Bikoh Community School - BIA Charter

White River, EPA Region 9 — Tribal Water Systems 85941 - drinking water served from groundwater sources to 622 people, tracked in EPA SDWIS and UCMR5.

622
People served
392
EPA violations
30
Health-based
Untested
UCMR5 result

The verdict

EPA records 392 drinking-water violations at Dishchii Bikoh Community School - BIA Charter, 8% of them health-based.

392
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
622
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Dishchii Bikoh Community School - BIA Charter

Dishchii Bikoh Community School - BIA Charter is a federal-owned community water system that delivers drinking water to 622 residents in White River, EPA Region 9 — Tribal Water Systems through 41 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 392 total violations for this system , of which 30 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 310 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 Coliform (TCR), recorded in 54 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 9 — 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
622
Total Violations
392
Health-Based Violations
30
Water Source
Groundwater

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

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 Dishchii Bikoh Community School - BIA Charter.

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 090400049 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 9 — Tribal Water Systems Drinking Water Authority

EPA Region 9 — 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 09 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 Chlorine MR 7 SDWIS / 090400049 / 0999
2023 Lead and Copper Rule MR 13 SDWIS / 090400049 / 5000
2021 Revised Total Coliform Rule MON 3 SDWIS / 090400049 / 8000
2016 Coliform (TCR) MR 54 SDWIS / 090400049 / 3100
2015 Coliform (TCR) MCL 16 SDWIS / 090400049 / 3100
2011 Arsenic MCL 14 SDWIS / 090400049 / 1005
2010 Arsenic MR 14 SDWIS / 090400049 / 1005
2010 Total Haloacetic Acids (HAA5) MR 2 SDWIS / 090400049 / 2456
2010 TTHM MR 2 SDWIS / 090400049 / 2950
2009 Nitrate MR 14 SDWIS / 090400049 / 1040
2005 CYANIDE MR 4 SDWIS / 090400049 / 1024
2005 Selenium MR 4 SDWIS / 090400049 / 1045
2005 Methoxychlor MR 4 SDWIS / 090400049 / 2015
2005 Dalapon MR 4 SDWIS / 090400049 / 2031
2005 Glyphosate MR 4 SDWIS / 090400049 / 2034

How Dishchii Bikoh Community School - BIA Charter Compares

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

Metric Dishchii Bikoh Community School - BIA Charter EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 392 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 30 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 622 - 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 9 — 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 Dishchii Bikoh Community School - BIA Charter water safe to drink? ▼
Dishchii Bikoh Community School - BIA Charter (PWS ID: 090400049) has 392 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 622 people using Groundwater sources.
How many people does Dishchii Bikoh Community School - BIA Charter serve? ▼
Dishchii Bikoh Community School - BIA Charter serves 622 people in White River, EPA Region 9 — Tribal Water Systems. It is a Federal-owned system using Groundwater water sources with 41 service connections.
What type of violations does Dishchii Bikoh Community School - BIA Charter have? ▼
Dishchii Bikoh Community School - BIA Charter has 392 total violations: 30 health-based violations (MCL exceedances or treatment failures), 310 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Dishchii Bikoh Community School - BIA Charter water? ▼
No PFAS testing data is available for Dishchii Bikoh Community School - BIA Charter under the EPA's UCMR5 monitoring program.
What water source does Dishchii Bikoh Community School - BIA Charter use? ▼
Dishchii Bikoh Community School - BIA Charter uses Groundwater 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.