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Community Water System · PWS AZ0415497

Ehrenberg Improvement District

Ehrenberg, Arizona 85334-0050 - drinking water served from surface water sources to 989 people, tracked in EPA SDWIS and UCMR5.

989
People served
240
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 240 drinking-water violations at Ehrenberg Improvement District, 2% of them health-based - above the Arizona per-system average.

240
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
989
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ehrenberg Improvement District

Ehrenberg Improvement District is a private-owned community water system that delivers drinking water to 989 residents in Ehrenberg, Arizona (La Paz County) through 318 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 240 total violations for this system , of which 5 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 206 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 Coliform (TCR), recorded in 46 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%).

Ehrenberg Improvement District's 240 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
989
Total Violations
240
Health-Based Violations
5
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
318
County
La Paz
School/Daycare
No
MCL Violations
4
Monitoring Violations
206
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 46 2009
Chlorine MR 40 2024
TTHM MR 20 2023
Total Haloacetic Acids (HAA5) MR 17 2023
Consumer Confidence Rule Other 15 2015
Lead and Copper Rule MR 8 2017
Nitrate MR 7 2000
E. COLI MR 5 2018
Chromium MR 3 1989
Barium MR 3 1989
Gross Alpha, Excl. Radon and U MR 3 1989
Arsenic MR 3 1989
Selenium MR 3 1989
Cadmium MR 3 1989
Fluoride MR 3 1989
Mercury MR 3 1989
TTHM MCL 2 2007
Public Notice Other 2 2022
Coliform (TCR) MCL 2 2000
Endrin MR 2 1999
BHC-GAMMA MR 2 1999
Toxaphene MR 2 1999
Methoxychlor MR 2 1999
2,4-D MR 2 1999
2,4,5-TP MR 2 1999
Surface Water Treatment Rule MR 2 2020
Interim Enhanced Surface Water Treatment Rule MR 2 2020
Dalapon MR 1 1999
Diquat MR 1 1999
OXAMYL 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 Ehrenberg Improvement 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 AZ0415497 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 Ehrenberg Improvement 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 Chlorine MR 40 SDWIS / AZ0415497 / 0999
2023 TTHM MR 20 SDWIS / AZ0415497 / 2950
2023 Total Haloacetic Acids (HAA5) MR 17 SDWIS / AZ0415497 / 2456
2022 Public Notice Other 2 SDWIS / AZ0415497 / 7500
2020 Surface Water Treatment Rule MR 2 SDWIS / AZ0415497 / 0200
2020 Interim Enhanced Surface Water Treatment Rule MR 2 SDWIS / AZ0415497 / 0300
2018 E. COLI MR 5 SDWIS / AZ0415497 / 3014
2017 Lead and Copper Rule MR 8 SDWIS / AZ0415497 / 5000
2015 Consumer Confidence Rule Other 15 SDWIS / AZ0415497 / 7000
2009 Coliform (TCR) MR 46 SDWIS / AZ0415497 / 3100
2007 TTHM MCL 2 SDWIS / AZ0415497 / 2950
2004 Surface Water Treatment Rule TT 1 SDWIS / AZ0415497 / 0200
2000 Nitrate MR 7 SDWIS / AZ0415497 / 1040
2000 Coliform (TCR) MCL 2 SDWIS / AZ0415497 / 3100
1999 Endrin MR 2 SDWIS / AZ0415497 / 2005

How Ehrenberg Improvement District Compares

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

Metric Ehrenberg Improvement District Arizona avg Federal benchmark
Total violations 240 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 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 989 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 Ehrenberg Improvement District water safe to drink? ▼
Ehrenberg Improvement District (PWS ID: AZ0415497) has 240 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 989 people using Surface Water sources.
How many people does Ehrenberg Improvement District serve? ▼
Ehrenberg Improvement District serves 989 people in Ehrenberg, Arizona. It is a Private-owned system using Surface Water water sources with 318 service connections.
What type of violations does Ehrenberg Improvement District have? ▼
Ehrenberg Improvement District has 240 total violations: 5 health-based violations (MCL exceedances or treatment failures), 206 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ehrenberg Improvement District water? ▼
No PFAS testing data is available for Ehrenberg Improvement District under the EPA's UCMR5 monitoring program.
What water source does Ehrenberg Improvement District use? ▼
Ehrenberg Improvement District uses Surface Water 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.