Seba Dalkai Boarding School BIA

Compiled by PlainEnviro Editorial, Environmental Data Editorial Team · July 13, 2026

PWSID: NN0436019 · Winslow, AZ · Serves 250 people

Health Violations

Seba Dalkai Boarding School BIA has 126 health-based violations out of 126 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.

Population Served

250

Total Violations

126

Health Violations

126

Source Type

Groundwater

Seba Dalkai Boarding School BIA (PWSID NN0436019) is a cws water system drawing from a groundwater source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 250 people in Winslow, AZ, and is subject to primacy enforcement by the Arizona drinking-water program.

The system's federal compliance record contains 126 total violations, with 126 classified as health-based (MCL exceedances or treatment-technique failures). 1 distinct contaminant has been cited, including Total Trihalomethanes (TTHM). Recorded violations span 2015–2024.

A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Arizona state drinking-water program's public portal.

System Details

EPA ID (PWSID): NN0436019
System Type: CWS
Water Source: Groundwater
Location: Winslow, AZ
Population Served: 250
Health Violations: Yes (126)

What contaminants are in this water system?

Contaminant	Violations	Health-Based
Total Trihalomethanes (TTHM)	126	126

Violation History (126)

Contaminant	Type	Health	Date	Enforcement
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	0436019OX09032441893
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	0436019FL07121941194
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	0436019OX09032441893
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	0436019OX09032441894
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	0436019FL07121941043
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	0436019OX09032441894
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	0436019OX09032441907
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	0436019FL07121940763
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	0436019FL07121940441
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	0436019OX09032441906
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	0436019FL07121940441
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	0436019FL07121940307
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	0436019FL07121940307
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	0436019OX09032441905
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	0436019FL07121940307
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	0436019FL07121940193
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	0436019FL07121940193
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	0436019OX09032441904
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	0436019FL07121940193
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	0436019FL07121939923
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	0436019FL07121939923
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	0436019OX09032441903
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	0436019FL07121939679
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	0436019FL07121939679
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	0436019FL07121939679
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	0436019OX09032441902
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	0436019FL07121939514
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	0436019FL07121939514
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	0436019FL07121939514
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	0436019OX09032441901
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	0436019FL07121939440
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	0436019FL07121939440
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	0436019OX09032441900
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	0436019FL07121939117
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	0436019FL07121939117
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	0436019FL07121939117
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	0436019OX09032441899
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	0436019FL07121938974
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	0436019FL07121938974
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	0436019FL07121938974
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	0436019OX09032441898
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	0436019FL07121938786
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	0436019FL07121938786
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	0436019FL07121938786
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	0436019OX09032441897
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	0436019FL07121938671
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	0436019FL07121938671
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	0436019FL07121938671
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	0436019OX09032441896
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	0436019FL07121938102
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	0436019FL07121938102
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	0436019FL07121938102
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	0436019OX09032441895
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	0436019FL07121937980
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	0436019FL07121937980
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	0436019FL07121937980
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	0436019OX09032441910
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	0436019FL07121937749
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	0436019FL07121937749
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	0436019FL07121937749
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	0436019OX09032441909
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	0436019FL07121937633
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	0436019FL07121937633
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	0436019FL07121937633
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	0436019OX09032441908
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	0436019FL07121937430
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	0436019FL07121937430
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	0436019FL07121937430
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	0436019OX09032441911
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	0436019FL07121937118
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	0436019FL07121937118
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	0436019FL07121937118
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	0436019OX09032441914
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	0436019FL07121937051
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	0436019FL07121937051
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	0436019FL07121937051
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	0436019OX09032441913
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	0436019FL07121936998
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	0436019FL07121936998
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	0436019FL07121936998
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	0436019OX09032441912
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2018	0436019FL07121936997
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2018	0436019FL07121936997
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2018	0436019FL07121936997
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2018	0436019OX09032441919
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2018	0436019FL07121936996
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2018	0436019FL07121936996
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2018	0436019FL07121936996
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2018	0436019OX09032441918
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2018	0436019FL07121936995
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2018	0436019FL07121936995
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2018	0436019FL07121936995
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2018	0436019OX09032441917
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2018	0436019FL07121936994
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2018	0436019FL07121936994
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2018	0436019FL07121936994
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2018	0436019OX09032441916
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2017	0436019FL07121936993
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2017	0436019FL07121936993
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2017	0436019FL07121936993

Showing 100 of 126 violations.

Frequently Asked Questions

Is Seba Dalkai Boarding School BIA water safe to drink?

Seba Dalkai Boarding School BIA has 126 health-based violations out of 126 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed. The system uses groundwater water as its source.

How many people does Seba Dalkai Boarding School BIA serve?

Seba Dalkai Boarding School BIA serves 250 people in Winslow, AZ. It is classified as a CWS water system.

What violations does Seba Dalkai Boarding School BIA have?

Seba Dalkai Boarding School BIA has 126 total violations on record spanning 2015–2024. 126 are health-based violations involving contaminants exceeding EPA limits.

What contaminants have been found in Seba Dalkai Boarding School BIA water?

Violations have been recorded for 1 contaminant. The most frequent: Total Trihalomethanes (TTHM).

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About This Data

Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

Read our methodology - how this data is sourced, computed, and verified.

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System Details

What contaminants are in this water system?

Violation History (126)

Frequently Asked Questions

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About This Data

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