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Community Water System · PWS AZ0413042

Cs Oak Creek Public Service LLC

Des Peres, Arizona 63131 - drinking water served from groundwater sources to 650 people, tracked in EPA SDWIS and UCMR5.

650
People served
231
EPA violations
3
Health-based
Untested
UCMR5 result

The verdict

EPA records 231 drinking-water violations at Cs Oak Creek Public Service LLC, 1% of them health-based - above the Arizona per-system average.

231
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
650
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Cs Oak Creek Public Service LLC

Cs Oak Creek Public Service LLC is a private-owned community water system that delivers drinking water to 650 residents in Des Peres, Arizona (Yavapai County) through 260 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 231 total violations for this system , of which 3 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 173 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 Chlorine, recorded in 35 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%).

Cs Oak Creek Public Service LLC's 231 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
650
Total Violations
231
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
260
County
Yavapai
School/Daycare
No
MCL Violations
3
Monitoring Violations
173
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 35 2023
Arsenic MR 23 2025
Coliform (TCR) MR 20 2015
Consumer Confidence Rule Other 16 2023
Lead and Copper Rule MR 10 2017
TTHM MR 6 2018
Total Haloacetic Acids (HAA5) MR 6 2018
Mercury MR 5 2015
Selenium MR 5 2015
Nitrate MR 5 2006
Chromium MR 5 2015
Barium MR 5 2015
Cadmium MR 5 2015
Fluoride MR 5 2015
Revised Total Coliform Rule RPT 4 2023
CYANIDE MR 3 2015
Antimony, Total MR 3 2015
Nickel MR 3 2015
Beryllium, Total MR 3 2015
Thallium, Total MR 3 2015
Arsenic MCL 3 2007
E. COLI MR 2 2015
cis-1,2-Dichloroethylene MR 1 1999
Xylenes, Total MR 1 1999
o-Dichlorobenzene MR 1 1999
Carbon tetrachloride MR 1 1999
1,1-Dichloroethylene MR 1 1999
1,2-Dichloroethane MR 1 1999
1,1,1-Trichloroethane MR 1 1999
Trichloroethylene MR 1 1999

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 Cs Oak Creek Public Service LLC.

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 AZ0413042 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 Cs Oak Creek Public Service LLC 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 Arsenic MR 23 SDWIS / AZ0413042 / 1005
2023 Chlorine MR 35 SDWIS / AZ0413042 / 0999
2023 Consumer Confidence Rule Other 16 SDWIS / AZ0413042 / 7000
2023 Revised Total Coliform Rule RPT 4 SDWIS / AZ0413042 / 8000
2018 TTHM MR 6 SDWIS / AZ0413042 / 2950
2018 Total Haloacetic Acids (HAA5) MR 6 SDWIS / AZ0413042 / 2456
2017 Lead and Copper Rule MR 10 SDWIS / AZ0413042 / 5000
2015 Coliform (TCR) MR 20 SDWIS / AZ0413042 / 3100
2015 Mercury MR 5 SDWIS / AZ0413042 / 1035
2015 Selenium MR 5 SDWIS / AZ0413042 / 1045
2015 Chromium MR 5 SDWIS / AZ0413042 / 1020
2015 Barium MR 5 SDWIS / AZ0413042 / 1010
2015 Cadmium MR 5 SDWIS / AZ0413042 / 1015
2015 Fluoride MR 5 SDWIS / AZ0413042 / 1025
2015 CYANIDE MR 3 SDWIS / AZ0413042 / 1024

How Cs Oak Creek Public Service LLC Compares

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

Metric Cs Oak Creek Public Service LLC Arizona avg Federal benchmark
Total violations 231 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 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 650 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 Cs Oak Creek Public Service LLC water safe to drink? ▼
Cs Oak Creek Public Service LLC (PWS ID: AZ0413042) has 231 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 650 people using Groundwater sources.
How many people does Cs Oak Creek Public Service LLC serve? ▼
Cs Oak Creek Public Service LLC serves 650 people in Des Peres, Arizona. It is a Private-owned system using Groundwater water sources with 260 service connections.
What type of violations does Cs Oak Creek Public Service LLC have? ▼
Cs Oak Creek Public Service LLC has 231 total violations: 3 health-based violations (MCL exceedances or treatment failures), 173 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Cs Oak Creek Public Service LLC water? ▼
No PFAS testing data is available for Cs Oak Creek Public Service LLC under the EPA's UCMR5 monitoring program.
What water source does Cs Oak Creek Public Service LLC use? ▼
Cs Oak Creek Public Service LLC 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.