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Community Water System · PWS AZ0401039

Ojo Bonito Estates Dwid

Vernon, Arizona 85940-0073 - drinking water served from groundwater sources to 54 people, tracked in EPA SDWIS and UCMR5.

54
People served
55
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 55 drinking-water violations at Ojo Bonito Estates Dwid - below the Arizona per-system average.

55
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
54
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ojo Bonito Estates Dwid

Ojo Bonito Estates Dwid is a private-owned community water system that delivers drinking water to 54 residents in Vernon, Arizona (Apache County) through 32 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 55 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 43 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 Lead and Copper Rule, recorded in 22 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%).

Ojo Bonito Estates Dwid's 55 violations sit below 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
54
Total Violations
55
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
32
County
Apache
School/Daycare
No
MCL Violations
0
Monitoring Violations
43
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 22 2025
Coliform (TCR) MR 8 2015
Consumer Confidence Rule Other 6 2025
Nitrate MR 3 2005
Gross Alpha, Excl. Radon and U MR 3 1987
Revised Total Coliform Rule RPT 2 2018
Selenium MR 1 1987
Barium MR 1 1987
Arsenic MR 1 1987
Fluoride MR 1 1987
Cadmium MR 1 1987
Chromium MR 1 1987
Mercury MR 1 1987

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 Ojo Bonito Estates Dwid.

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 AZ0401039 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 Ojo Bonito Estates Dwid 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 Lead and Copper Rule MR 22 SDWIS / AZ0401039 / 5000
2025 Consumer Confidence Rule Other 6 SDWIS / AZ0401039 / 7000
2018 Revised Total Coliform Rule RPT 2 SDWIS / AZ0401039 / 8000
2015 Coliform (TCR) MR 8 SDWIS / AZ0401039 / 3100
2005 Nitrate MR 3 SDWIS / AZ0401039 / 1040
1987 Gross Alpha, Excl. Radon and U MR 3 SDWIS / AZ0401039 / 4000
1987 Selenium MR 1 SDWIS / AZ0401039 / 1045
1987 Barium MR 1 SDWIS / AZ0401039 / 1010
1987 Arsenic MR 1 SDWIS / AZ0401039 / 1005
1987 Fluoride MR 1 SDWIS / AZ0401039 / 1025
1987 Cadmium MR 1 SDWIS / AZ0401039 / 1015
1987 Chromium MR 1 SDWIS / AZ0401039 / 1020
1987 Mercury MR 1 SDWIS / AZ0401039 / 1035

How Ojo Bonito Estates Dwid Compares

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

Metric Ojo Bonito Estates Dwid Arizona avg Federal benchmark
Total violations 55 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 54 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 Ojo Bonito Estates Dwid water safe to drink? ▼
Ojo Bonito Estates Dwid (PWS ID: AZ0401039) has 55 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 54 people using Groundwater sources.
How many people does Ojo Bonito Estates Dwid serve? ▼
Ojo Bonito Estates Dwid serves 54 people in Vernon, Arizona. It is a Private-owned system using Groundwater water sources with 32 service connections.
What type of violations does Ojo Bonito Estates Dwid have? ▼
Ojo Bonito Estates Dwid has 55 total violations: 0 health-based violations (MCL exceedances or treatment failures), 43 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ojo Bonito Estates Dwid water? ▼
No PFAS testing data is available for Ojo Bonito Estates Dwid under the EPA's UCMR5 monitoring program.
What water source does Ojo Bonito Estates Dwid use? ▼
Ojo Bonito Estates Dwid 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.