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Community Water System · PWS AZ0409001

Sun Valley Utilities

Holbrook, Arizona 86025 - drinking water served from groundwater sources to 287 people, tracked in EPA SDWIS and UCMR5.

287
People served
273
EPA violations
19
Health-based
Untested
UCMR5 result

The verdict

EPA records 273 drinking-water violations at Sun Valley Utilities, 7% of them health-based - above the Arizona per-system average.

273
Total EPA violations on record
7%
Health-based (MCL / treatment failure)
287
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sun Valley Utilities

Sun Valley Utilities is a private-owned community water system that delivers drinking water to 287 residents in Holbrook, Arizona (Navajo County) through 83 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 273 total violations for this system , of which 19 (7%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 184 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Consumer Confidence Rule, recorded in 25 violations (Other). 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%).

Sun Valley Utilities's 273 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
287
Total Violations
273
Health-Based Violations
19
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
83
County
Navajo
School/Daycare
No
MCL Violations
17
Monitoring Violations
184
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 25 2025
Chlorine MR 24 2021
Revised Total Coliform Rule RPT 23 2024
TTHM MR 21 2022
Lead and Copper Rule MR 17 2023
Coliform (TCR) MR 16 2015
Total Haloacetic Acids (HAA5) MR 16 2021
Arsenic MR 11 1980
TTHM MCL 9 2025
Public Notice Other 8 2024
Coliform (TCR) MCL 7 2005
Nitrate MR 5 2003
Gross Alpha, Excl. Radon and U MR 4 1987
Revised Total Coliform Rule MON 2 2016
Revised Total Coliform Rule TT 2 2019
cis-1,2-Dichloroethylene MR 2 1998
o-Dichlorobenzene MR 2 1998
1,1-Dichloroethylene MR 2 1998
1,1,1-Trichloroethane MR 2 1998
1,2-Dichloropropane MR 2 1998
Trichloroethylene MR 2 1998
Tetrachloroethylene MR 2 1998
Toluene MR 2 1998
Styrene MR 2 1998
1,1,2-Trichloroethane MR 2 1998
1,2-Dichloroethane MR 2 1998
CHLOROBENZENE MR 2 1998
Benzene MR 2 1998
Carbon tetrachloride MR 2 1998
DICHLOROMETHANE 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 Sun Valley Utilities.

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 AZ0409001 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 Sun Valley Utilities 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
2025 Consumer Confidence Rule Other 25 SDWIS / AZ0409001 / 7000
2025 TTHM MCL 9 SDWIS / AZ0409001 / 2950
2024 Revised Total Coliform Rule RPT 23 SDWIS / AZ0409001 / 8000
2024 Public Notice Other 8 SDWIS / AZ0409001 / 7500
2023 Lead and Copper Rule MR 17 SDWIS / AZ0409001 / 5000
2022 TTHM MR 21 SDWIS / AZ0409001 / 2950
2021 Chlorine MR 24 SDWIS / AZ0409001 / 0999
2021 Total Haloacetic Acids (HAA5) MR 16 SDWIS / AZ0409001 / 2456
2019 Revised Total Coliform Rule TT 2 SDWIS / AZ0409001 / 8000
2016 Revised Total Coliform Rule MON 2 SDWIS / AZ0409001 / 8000
2015 Coliform (TCR) MR 16 SDWIS / AZ0409001 / 3100
2005 Coliform (TCR) MCL 7 SDWIS / AZ0409001 / 3100
2004 Beryllium, Total MR 1 SDWIS / AZ0409001 / 1075
2003 Nitrate MR 5 SDWIS / AZ0409001 / 1040
1998 cis-1,2-Dichloroethylene MR 2 SDWIS / AZ0409001 / 2380

How Sun Valley Utilities Compares

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

Metric Sun Valley Utilities Arizona avg Federal benchmark
Total violations 273 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 19 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 287 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 Sun Valley Utilities water safe to drink? ▼
Sun Valley Utilities (PWS ID: AZ0409001) has 273 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 287 people using Groundwater sources.
How many people does Sun Valley Utilities serve? ▼
Sun Valley Utilities serves 287 people in Holbrook, Arizona. It is a Private-owned system using Groundwater water sources with 83 service connections.
What type of violations does Sun Valley Utilities have? ▼
Sun Valley Utilities has 273 total violations: 19 health-based violations (MCL exceedances or treatment failures), 184 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sun Valley Utilities water? ▼
No PFAS testing data is available for Sun Valley Utilities under the EPA's UCMR5 monitoring program.
What water source does Sun Valley Utilities use? ▼
Sun Valley Utilities 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.