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Community Water System · PWS AZ0409046

Holbrook SDA Indian School

Holbrook, Arizona 86025 - drinking water served from groundwater sources to 100 people, tracked in EPA SDWIS and UCMR5.

100
People served
200
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 200 drinking-water violations at Holbrook SDA Indian School, 1% of them health-based - above the Arizona per-system average.

200
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
100
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Holbrook SDA Indian School

Holbrook SDA Indian School is a private-owned community water system that delivers drinking water to 100 residents in Holbrook, Arizona (Navajo County) through 25 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 200 total violations for this system , of which 2 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 182 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 36 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Arizona, EPA tracks 1,493 public water systems serving 7,322,166 people, with 228,944 cumulative violations and 15,663 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 153.3 violations. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%).

Holbrook SDA Indian School's 200 violations sit above the Arizona average.

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
100
Total Violations
200
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
25
County
Navajo
School/Daycare
Yes
MCL Violations
2
Monitoring Violations
182
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 36 2015
Chlorine MR 19 2022
Lead and Copper Rule MR 16 2023
Revised Total Coliform Rule MON 11 2023
TTHM MR 7 2023
Total Haloacetic Acids (HAA5) MR 7 2023
Nitrate MR 6 2005
Revised Total Coliform Rule RPT 3 2018
cis-1,2-Dichloroethylene MR 2 1998
p-Dichlorobenzene MR 2 1998
trans-1,2-Dichloroethylene MR 2 1998
1,2-Dichloroethane MR 2 1998
1,2-Dichloropropane MR 2 1998
1,1,2-Trichloroethane MR 2 1998
Tetrachloroethylene MR 2 1998
Benzene MR 2 1998
Toluene MR 2 1998
Ethylbenzene MR 2 1998
Coliform (TCR) MCL 2 1997
Barium MR 2 1989
Mercury MR 2 1989
Styrene MR 2 1998
Cadmium MR 2 1989
CHLOROBENZENE MR 2 1998
Fluoride MR 2 1989
DICHLOROMETHANE MR 2 1998
Chromium MR 2 1989
Arsenic MR 2 1989
Selenium MR 2 1989
o-Dichlorobenzene MR 2 1998

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 Holbrook SDA Indian School.

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 AZ0409046 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Arizona Drinking Water Authority

Arizona DEQ, Drinking Water Program is the primacy agency that licenses and inspects Holbrook SDA Indian School under EPA-delegated authority.

Open AZ regulator portal

Source: Arizona DEQ, Drinking Water Program

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
2023 Lead and Copper Rule MR 16 SDWIS / AZ0409046 / 5000
2023 Revised Total Coliform Rule MON 11 SDWIS / AZ0409046 / 8000
2023 TTHM MR 7 SDWIS / AZ0409046 / 2950
2023 Total Haloacetic Acids (HAA5) MR 7 SDWIS / AZ0409046 / 2456
2023 Public Notice Other 1 SDWIS / AZ0409046 / 7500
2022 Chlorine MR 19 SDWIS / AZ0409046 / 0999
2018 Revised Total Coliform Rule RPT 3 SDWIS / AZ0409046 / 8000
2015 Coliform (TCR) MR 36 SDWIS / AZ0409046 / 3100
2005 Nitrate MR 6 SDWIS / AZ0409046 / 1040
1998 cis-1,2-Dichloroethylene MR 2 SDWIS / AZ0409046 / 2380
1998 p-Dichlorobenzene MR 2 SDWIS / AZ0409046 / 2969
1998 trans-1,2-Dichloroethylene MR 2 SDWIS / AZ0409046 / 2979
1998 1,2-Dichloroethane MR 2 SDWIS / AZ0409046 / 2980
1998 1,2-Dichloropropane MR 2 SDWIS / AZ0409046 / 2983
1998 1,1,2-Trichloroethane MR 2 SDWIS / AZ0409046 / 2985

How Holbrook SDA Indian School Compares

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

Metric Holbrook SDA Indian School Arizona avg Federal benchmark
Total violations 200 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 95.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 100 4,904 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,493 regulated public water systems in Arizona.

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 Holbrook SDA Indian School water safe to drink? ▼
Holbrook SDA Indian School (PWS ID: AZ0409046) has 200 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 100 people using Groundwater sources.
How many people does Holbrook SDA Indian School serve? ▼
Holbrook SDA Indian School serves 100 people in Holbrook, Arizona. It is a Private-owned system using Groundwater water sources with 25 service connections.
What type of violations does Holbrook SDA Indian School have? ▼
Holbrook SDA Indian School has 200 total violations: 2 health-based violations (MCL exceedances or treatment failures), 182 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Holbrook SDA Indian School water? ▼
No PFAS testing data is available for Holbrook SDA Indian School under the EPA's UCMR5 monitoring program.
What water source does Holbrook SDA Indian School use? ▼
Holbrook SDA Indian School 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.