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Community Water System · PWS AZ0413041

Oak Creek Water District

Sedona, Arizona 86336 - drinking water served from groundwater sources to 1,507 people, tracked in EPA SDWIS and UCMR5.

1,507
People served
431
EPA violations
143
Health-based
Untested
UCMR5 result

The verdict

EPA records 431 drinking-water violations at Oak Creek Water District, 33% of them health-based - above the Arizona per-system average.

431
Total EPA violations on record
33%
Health-based (MCL / treatment failure)
1,507
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Oak Creek Water District

Oak Creek Water District is a private-owned community water system that delivers drinking water to 1,507 residents in Sedona, Arizona (Yavapai County) through 755 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 431 total violations for this system , of which 143 (33%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 240 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 Arsenic, recorded in 137 violations (MCL, health-based). 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%).

Oak Creek Water District's 431 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
1,507
Total Violations
431
Health-Based Violations
143
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
755
County
Yavapai
School/Daycare
No
MCL Violations
139
Monitoring Violations
240
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 137 2023
Arsenic MR 51 2021
Coliform (TCR) MR 28 2016
Consumer Confidence Rule Other 22 2017
Nitrate MR 18 2006
E. COLI MR 7 2023
Lead and Copper Rule MR 5 2023
Revised Total Coliform Rule RPT 5 2023
Revised Total Coliform Rule TT 4 2024
Mercury MR 3 1998
Revised Total Coliform Rule MON 3 2017
Cadmium MR 3 1998
Chromium MR 3 1998
Fluoride MR 3 1998
Selenium MR 3 1998
Barium MR 3 1998
BHC-GAMMA MR 2 1998
Methoxychlor MR 2 1998
Dalapon MR 2 1998
Endothall MR 2 1998
Glyphosate MR 2 1998
OXAMYL MR 2 1998
Simazine MR 2 1998
Picloram MR 2 1998
Atrazine MR 2 1998
Heptachlor MR 2 1998
2,4-D MR 2 1998
HEXACHLOROBENZENE MR 2 1998
Benzo(a)pyrene MR 2 1998
Pentachlorophenol 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 Oak Creek Water District.

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 AZ0413041 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 Oak Creek Water District 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
2024 Revised Total Coliform Rule TT 4 SDWIS / AZ0413041 / 8000
2024 Public Notice Other 2 SDWIS / AZ0413041 / 7500
2023 Arsenic MCL 137 SDWIS / AZ0413041 / 1005
2023 E. COLI MR 7 SDWIS / AZ0413041 / 3014
2023 Lead and Copper Rule MR 5 SDWIS / AZ0413041 / 5000
2023 Revised Total Coliform Rule RPT 5 SDWIS / AZ0413041 / 8000
2021 Arsenic MR 51 SDWIS / AZ0413041 / 1005
2017 Consumer Confidence Rule Other 22 SDWIS / AZ0413041 / 7000
2017 Revised Total Coliform Rule MON 3 SDWIS / AZ0413041 / 8000
2016 Coliform (TCR) MR 28 SDWIS / AZ0413041 / 3100
2006 Nitrate MR 18 SDWIS / AZ0413041 / 1040
1998 Mercury MR 3 SDWIS / AZ0413041 / 1035
1998 Cadmium MR 3 SDWIS / AZ0413041 / 1015
1998 Chromium MR 3 SDWIS / AZ0413041 / 1020
1998 Fluoride MR 3 SDWIS / AZ0413041 / 1025

How Oak Creek Water District Compares

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

Metric Oak Creek Water District Arizona avg Federal benchmark
Total violations 431 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 143 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 1,507 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 Oak Creek Water District water safe to drink? ▼
Oak Creek Water District (PWS ID: AZ0413041) has 431 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,507 people using Groundwater sources.
How many people does Oak Creek Water District serve? ▼
Oak Creek Water District serves 1,507 people in Sedona, Arizona. It is a Private-owned system using Groundwater water sources with 755 service connections.
What type of violations does Oak Creek Water District have? ▼
Oak Creek Water District has 431 total violations: 143 health-based violations (MCL exceedances or treatment failures), 240 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Oak Creek Water District water? ▼
No PFAS testing data is available for Oak Creek Water District under the EPA's UCMR5 monitoring program.
What water source does Oak Creek Water District use? ▼
Oak Creek Water District 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.