Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	090400395
PWS Name	Hopi High School - BIA
PWS Type	Community water system
Owner Type	Federal government
Primary Source	Ground water
Primacy Type	Tribal
Is Wholesaler?	No
Population Served	1005
County Served

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
TT	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Stage 1 Disinfectants and Disinfection Byproducts Rule	0400395120400102025	Open	21-OCT-2025	-	Yes
MR	Monitoring, Regular	Arsenic Rule	Arsenic	0400395031005102025	Known	01-OCT-2025	31-DEC-2025	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	0400395021005102025	Known	01-OCT-2025	31-DEC-2025	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Fluoride	0400395021025102025	Known	01-OCT-2025	31-DEC-2025	Yes
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	0400395031025102025	Known	01-OCT-2025	31-DEC-2025	No
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Fluoride	040039502102572025	Known	01-JUL-2025	30-SEP-2025	Yes
MR	Monitoring, Regular	Arsenic Rule	Arsenic	0400395031005720250	Known	01-JUL-2025	30-SEP-2025	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	040039575750072025	Open	01-JUL-2025	-	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	0400395031005720251	Known	01-JUL-2025	01-SEP-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	040039503102542025	Known	01-APR-2025	30-JUN-2025	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	040039503100542025	Known	01-APR-2025	30-JUN-2025	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	040039575750022025	Open	01-FEB-2025	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003953A800022025	Returned to Compliance	01-FEB-2025	28-FEB-2025	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	040039575750012025	Open	01-JAN-2025	-	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	040039503102512025	Known	01-JAN-2025	31-MAR-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	040039527099912025	Returned to Compliance	01-JAN-2025	31-MAR-2025	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	040039503100512025	Known	01-JAN-2025	31-MAR-2025	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	040039503104012025	Known	01-JAN-2025	31-DEC-2025	No
RPT	Notification, Known or Potential LSL	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	04003954H5200112024	Open	16-NOV-2024	-	No
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	04003952E5200102024	Open	17-OCT-2024	-	Yes
MR	Monitoring, Regular	Arsenic Rule	Arsenic	0400395031005102024	Known	01-OCT-2024	31-DEC-2024	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	0400395031025102024	Known	01-OCT-2024	31-DEC-2024	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	040039503102542024	Known	01-APR-2024	30-JUN-2024	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	040039503104012024	Known	01-JAN-2024	31-DEC-2024	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	0400395031025102023	Known	01-OCT-2023	31-DEC-2023	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	0400395270999102023	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003954B800082023	Returned to Compliance	01-AUG-2023	-	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	040039502100572023	Known	01-JUL-2023	30-SEP-2023	Yes
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	040039503102572023	Known	01-JUL-2023	30-SEP-2023	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	040039527099972023	Returned to Compliance	01-JUL-2023	30-SEP-2023	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	0400395757500720231	Open	01-JUL-2023	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003953A800072023	Returned to Compliance	01-JUL-2023	31-JUL-2023	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	0400395757500720230	Open	01-JUL-2023	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003953A800062023	Returned to Compliance	01-JUN-2023	30-JUN-2023	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	040039575750062023	Returned to Compliance	01-JUN-2023	-	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003954B800052023	Returned to Compliance	01-MAY-2023	-	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003954B800042023	Returned to Compliance	01-APR-2023	-	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	040039503100542023	Known	01-APR-2023	30-JUN-2023	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	040039527099942023	Returned to Compliance	01-APR-2023	30-JUN-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	040039503102542023	Known	01-APR-2023	30-JUN-2023	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003954B800032023	Returned to Compliance	01-MAR-2023	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	040039575750032023	Open	01-MAR-2023	-	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	040039545070012023	Open	14-JAN-2023	-	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	040039527295012023	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	040039503102012023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	040039503104512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	040039503103512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	040039503102512023	Known	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	040039503107512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	040039503108512023	Known	01-JAN-2023	31-DEC-2025	No

1 - 50 of 233

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
0400395IA12022512325	040039502102572025	EIA	Federal Violation/Reminder Notice	02-DEC-2025	Region	Informal Violation Report, look for SDWIS-Fed compliance rate after this action to determine change in behavior.
0400395IA09162512254	040039503100542025	EIA	Federal Violation/Reminder Notice	16-SEP-2025	Region	Informal Violation Report, look for SDWIS-Fed compliance rate after this action to determine change in behavior.
0400395OX09032512342	0400395270999102023	EOX	Federal Compliance achieved	03-SEP-2025	Region	Subsequent reporting of required results.
0400395OX09032512342	040039527099912025	EOX	Federal Compliance achieved	03-SEP-2025	Region	Subsequent reporting of required results.
0400395OX09032512342	040039527099942023	EOX	Federal Compliance achieved	03-SEP-2025	Region	Subsequent reporting of required results.
0400395IA06112512165	04003953A800022025	EIA	Federal Violation/Reminder Notice	11-JUN-2025	Region	Informal Violation Report, look for SDWIS-Fed compliance rate after this action to determine change in behavior.
0400395IA04032512084	0400395031025102024	EIA	Federal Violation/Reminder Notice	03-APR-2025	Region	Informal Violation Report, look for SDWIS-Fed compliance rate after this action to determine change in behavior.
0400395OX09182412342	040039552500012022	EOX	Federal Compliance achieved	18-SEP-2024	Region	Subsequent reporting of required results.
0400395OX09182412343	040039552500012023	EOX	Federal Compliance achieved	18-SEP-2024	Region	Subsequent reporting of required results.
0400395OX09102412342	040039530295012022	EOX	Federal Compliance achieved	10-SEP-2024	Region	Subsequent reporting of required results.
0400395OX09102412342	040039527295012023	EOX	Federal Compliance achieved	10-SEP-2024	Region	Subsequent reporting of required results.
0400395OX09102412342	040039527245612023	EOX	Federal Compliance achieved	10-SEP-2024	Region	Subsequent reporting of required results.
0400395OX09102412342	040039530245612022	EOX	Federal Compliance achieved	10-SEP-2024	Region	Subsequent reporting of required results.
0400395OX02062412342	040039503104012023	EOX	Federal Compliance achieved	06-FEB-2024	Region	Subsequent reporting of required results.
0400395OX09142311554	04003954B800082023	EOX	Federal Compliance achieved	14-SEP-2023	Region	-
0400395OX08022311554	040039527099972023	EOX	Federal Compliance achieved	02-AUG-2023	Region	-
0400395OX08022312341	04003953A800062023	EOX	Federal Compliance achieved	02-AUG-2023	Region	Subsequent reporting of required results.
0400395OX08022311554	04003953A800072023	EOX	Federal Compliance achieved	02-AUG-2023	Region	-
0400395OX06202311498	04003954B800032023	EOX	Federal Compliance achieved	20-JUN-2023	Region	Submission of required documentation.
0400395OX06202311514	04003954B800052023	EOX	Federal Compliance achieved	20-JUN-2023	Region	Submission of required documentation.
0400395OX06202311515	04003954B800042023	EOX	Federal Compliance achieved	20-JUN-2023	Region	Submission of required documentation.
0400395OX10272211554	040039575750062023	EOX	Federal Compliance achieved	27-OCT-2022	Region	-
0400395OX10042211301	040039527099972022	EOX	Federal Compliance achieved	04-OCT-2022	Region	Subsequent reporting of required results.
0400395OX10042211301	04003953A800092022	EOX	Federal Compliance achieved	04-OCT-2022	Region	Subsequent reporting of required results.
0400395OX08162211203	040039503102512022	EOX	Federal Compliance achieved	16-AUG-2022	Region	Subsequent reporting of required results.
0400395OX08162211203	040039503102542022	EOX	Federal Compliance achieved	16-AUG-2022	Region	Subsequent reporting of required results.
0400395OX03012211149	040039527099912022	EOX	Federal Compliance achieved	01-MAR-2022	Region	Subsequent reporting of required results.
0400395OX01042211026	0400395270999102021	EOX	Federal Compliance achieved	04-JAN-2022	Region	Subsequent reporting of required results.
0400395OX11232111026	040039503100542021	EOX	Federal Compliance achieved	23-NOV-2021	Region	Subsequent reporting of required results.
0400395OX11232111026	040039503102572021	EOX	Federal Compliance achieved	23-NOV-2021	Region	Subsequent reporting of required results.
0400395OX11232111026	040039503102542021	EOX	Federal Compliance achieved	23-NOV-2021	Region	Subsequent reporting of required results.
0400395OX11232111026	0400395031025102020	EOX	Federal Compliance achieved	23-NOV-2021	Region	Subsequent reporting of required results.
0400395OX11232111026	040039503100572021	EOX	Federal Compliance achieved	23-NOV-2021	Region	Subsequent reporting of required results.
0400395OX10192111026	040039552500012020	EOX	Federal Compliance achieved	19-OCT-2021	Region	-
0400395OX09142110891	040039527099972021	EOX	Federal Compliance achieved	14-SEP-2021	Region	Subsequent reporting of required results.
0400395OX09142110819	040039527099942021	EOX	Federal Compliance achieved	14-SEP-2021	Region	Subsequent reporting of required results.
0400395OX07282010409	040039503101012017	EOX	Federal Compliance achieved	28-JUL-2020	Region	Subsequent reporting of required results.
0400395OX07282010409	040039503101512017	EOX	Federal Compliance achieved	28-JUL-2020	Region	Subsequent reporting of required results.
0400395OX07282010409	040039503107512017	EOX	Federal Compliance achieved	28-JUL-2020	Region	Subsequent reporting of required results.
0400395OX07282010409	040039503102512017	EOX	Federal Compliance achieved	28-JUL-2020	Region	Subsequent reporting of required results.
0400395OX07282010409	040039503104012019	EOX	Federal Compliance achieved	28-JUL-2020	Region	Subsequent reporting of required results.
0400395OX07282010409	040039503102012017	EOX	Federal Compliance achieved	28-JUL-2020	Region	Subsequent reporting of required results.
0400395OX12131996312	04003953A800092019	EOX	Federal Compliance achieved	13-DEC-2019	Region	Subsequent reporting of required results.
0400395OX11071997030	0400395343014102019	EOX	Federal Compliance achieved	07-NOV-2019	Region	Subsequent reporting of required results.
0400395OX05071996700	0400395031005102018	EOX	Federal Compliance achieved	07-MAY-2019	Region	Subsequent reporting of required results.
0400395OX04241994472	0400395450700112018	EOX	Federal Compliance achieved	24-APR-2019	Region	Deficiency/Defect corrected.
0400395OX03271994473	040039530295012018	EOX	Federal Compliance achieved	27-MAR-2019	Region	Subsequent reporting of required results.
0400395OX06061788514	040039502100512016	EOX	Federal Compliance achieved	06-JUN-2017	Region	-
0400395OX06061788515	040039502100542016	EOX	Federal Compliance achieved	06-JUN-2017	Region	-
0400395OX06061788518	040039502100572016	EOX	Federal Compliance achieved	06-JUN-2017	Region	-

1 - 50 of 191

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
Well 3	0400395GW003	Yes	Well	Ground water	Emergency	Inactive
Well 2 (North of School)	0400395GW002	Yes	Well	Ground water	Permanent	Active
Well 1	0400395GW001	Yes	Well	Ground water	Permanent	Active
Entry Point for TP001	0400395EP001	No	Common Headers	-	-	Active
Entry Point for TP002.	0400395EP002	No	Common Headers	-	-	Active
PWS# 0400395 distribution system	0400395DS001	No	Distribution System/Zone	-	-	Active
Transfer Pump for Treated Water	0400395PF001	No	Pump Facility	-	-	Active
Elevated Storage Tank	0400395ST001	No	Storage	-	-	Active
Buried RO-Treated Water Storage Tank	0400395ST002	No	Storage	-	-	Active
Reverse Osmosis Treatment Plant	0400395TP001	No	Treatment Plant	-	-	Active
ChlorinationUnit for Well 1	0400395TP002	No	Treatment Plant	-	-	Active

1 - 11 of 11

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
Reverse Osmosis Treatment Plant	0400395TP001	Hypochlorination, Post	Disinfection
Reverse Osmosis Treatment Plant	0400395TP001	Filtration, Cartridge	Particulate removal
Reverse Osmosis Treatment Plant	0400395TP001	Activated Carbon, Granular	Taste / odor control
Reverse Osmosis Treatment Plant	0400395TP001	Reverse Osmosis	Inorganics removal
Reverse Osmosis Treatment Plant	0400395TP001	Innovative	Inorganics removal
ChlorinationUnit for Well 1	0400395TP002	Hypochlorination, Post	Disinfection

1 - 6 of 6

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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