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CIENEGA WATER COMPANY INC

PWS ID: AZ0415002 · PARKER, Arizona 85344

CIENEGA WATER COMPANY INC serves 108 people in PARKER, Arizona using Groundwater water sources. It has 631 recorded EPA violations, including 121 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CIENEGA WATER COMPANY INC

CIENEGA WATER COMPANY INC is a private-owned community water system that delivers drinking water to 108 residents in PARKER, Arizona (La Paz County) through 54 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 631 total violations for this system , of which 121 (19%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 399 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 Fluoride, recorded in 133 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. CIENEGA WATER COMPANY INC's 631 violations sit above the Arizona average. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%). 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
108
Total Violations
631
Health-Based Violations
121
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
54
County
La Paz
School/Daycare
No
MCL Violations
119
Monitoring Violations
399
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Fluoride MR 133 2025
Fluoride MCL 118 2025
Chlorine MR 90 2025
Coliform (TCR) MR 52 2015
Revised Total Coliform Rule MON 31 2025
Public Notice Other 30 2025
Consumer Confidence Rule Other 23 2025
Lead and Copper Rule MR 16 2024
Total Haloacetic Acids (HAA5) MR 10 2020
TTHM MR 10 2020
Nitrate MR 6 2006
Revised Total Coliform Rule RPT 4 2024
cis-1,2-Dichloroethylene MR 2 1998
1,1-Dichloroethylene MR 2 1998
trans-1,2-Dichloroethylene MR 2 1998
Trichloroethylene MR 2 1998
1,1,2-Trichloroethane MR 2 1998
Tetrachloroethylene MR 2 1998
CHLOROBENZENE MR 2 1998
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 2013
LEAD AND COPPER RULE REVISIONS TT 2 2024
1,2-Dichloropropane MR 2 1998
Styrene MR 2 1998
Toluene MR 2 1998
Benzene MR 2 1998
1,1,1-Trichloroethane MR 2 1998
Ethylbenzene MR 2 1998
o-Dichlorobenzene 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 CIENEGA WATER COMPANY INC.

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 AZ0415002 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 CIENEGA WATER COMPANY INC 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 Fluoride MR 133 SDWIS / AZ0415002 / 1025
2025 Fluoride MCL 118 SDWIS / AZ0415002 / 1025
2025 Chlorine MR 90 SDWIS / AZ0415002 / 0999
2025 Revised Total Coliform Rule MON 31 SDWIS / AZ0415002 / 8000
2025 Public Notice Other 30 SDWIS / AZ0415002 / 7500
2025 Consumer Confidence Rule Other 23 SDWIS / AZ0415002 / 7000
2024 Lead and Copper Rule MR 16 SDWIS / AZ0415002 / 5000
2024 Revised Total Coliform Rule RPT 4 SDWIS / AZ0415002 / 8000
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / AZ0415002 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / AZ0415002 / 5200
2020 Total Haloacetic Acids (HAA5) MR 10 SDWIS / AZ0415002 / 2456
2020 TTHM MR 10 SDWIS / AZ0415002 / 2950
2015 Coliform (TCR) MR 52 SDWIS / AZ0415002 / 3100
2013 Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 SDWIS / AZ0415002 / 0600
2010 E. COLI MR 1 SDWIS / AZ0415002 / 3014

How CIENEGA WATER COMPANY INC Compares

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

Metric CIENEGA WATER COMPANY INC Arizona avg Federal benchmark
Total violations 631 153.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 121 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 108 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is CIENEGA WATER COMPANY INC water safe to drink? ▼
CIENEGA WATER COMPANY INC (PWS ID: AZ0415002) has 631 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 108 people using Groundwater sources.
How many people does CIENEGA WATER COMPANY INC serve? ▼
CIENEGA WATER COMPANY INC serves 108 people in PARKER, Arizona. It is a Private-owned system using Groundwater water sources with 54 service connections.
What type of violations does CIENEGA WATER COMPANY INC have? ▼
CIENEGA WATER COMPANY INC has 631 total violations: 121 health-based violations (MCL exceedances or treatment failures), 399 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CIENEGA WATER COMPANY INC water? ▼
No PFAS testing data is available for CIENEGA WATER COMPANY INC under the EPA's UCMR5 monitoring program.
What water source does CIENEGA WATER COMPANY INC use? ▼
CIENEGA WATER COMPANY INC 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.

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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.

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