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Public Water System

WHITE HORSE RANCH OWNERS ASSOCIATION

PWSID AZ0413221 · Arizona · 292 people served

F
Failing

WHITE HORSE RANCH OWNERS ASSOCIATION is an EPA-regulated public water system in Arizona (PWSID AZ0413221). It serves an estimated 292 residents — a rural community of customers — across 1 community across 1 ZIP code.

Over the past five years, WHITE HORSE RANCH OWNERS ASSOCIATION has recorded 77 EPA health-based violations. The grade of F summarizes this compliance pattern. Specific contaminants, dates, and rule citations are listed in the violation history below.

Service Area

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Centered on the averaged ZIP-code centroid of 1 ZIP served.

Population

292

Cities

1

ZIPs

1

Violations

77

EPA Health-Based Violations

Health-based Maximum Contaminant Level (MCL) violations on file for WHITE HORSE RANCH OWNERS ASSOCIATION over the past five years of EPA SDWIS reporting.

EPA Code 0700 · Treatment Technique Violation

2

violations

EPA Limit

0 per 100 mL presence/absence

Last Reading

First Reported

Nov 2025

Most Recent

Nov 2025

What this violation means

Total coliform bacteria are themselves usually harmless, but their presence signals that the water distribution system has a vulnerability — typically a cracked pipe, loss of pressure, or back-siphonage — that could allow disease-causing pathogens to enter. Repeated coliform-positive samples trigger mandatory utility investigation.

Recommended precautions

  • If your utility issues a boil-water advisory, boil all drinking and cooking water for at least one minute.
  • Use bottled water until the advisory is lifted.
  • Ice from icemakers and beverages made before the advisory should be discarded.
  • UV light and chlorination both kill coliform bacteria — most home filters do not.
Nitratechemical

EPA Code 1040 · Maximum Contaminant Level Exceedance

75

violations

EPA Limit

10 mg/L

Last Reading

23 MG/L

First Reported

Apr 2021

Most Recent

Oct 2025

What this violation means

Nitrate contamination is most acute in agricultural regions where fertilizer and animal waste leach into groundwater. The immediate risk is to formula-fed infants under 6 months — high nitrate levels prevent their blood from carrying oxygen, causing 'blue baby syndrome.' Pregnant women should also avoid high-nitrate water.

Recommended precautions

  • Never give untreated high-nitrate water to infants — use bottled water for formula.
  • Boiling does NOT remove nitrate. Boiling concentrates it.
  • Reverse osmosis, ion exchange, or distillation are the only effective home treatments.
  • Private well owners in farming areas should test annually for nitrate.

Source: EPA Safe Drinking Water Information System (SDWIS). Health-based violations only. Older violations may have been resolved; check your utility's most recent Consumer Confidence Report for current status.

Cities Served by WHITE HORSE RANCH OWNERS ASSOCIATION

ZIP Codes Served

About this system

EPA records this system as PWSID AZ0413221. Data reflects the most recent EPA SDWIS publication as of 2026-05-18. Public Water System Identifiers (PWSIDs) are assigned by the EPA's Safe Drinking Water Act program to track every regulated water utility in the United States. The first two letters typically indicate the state primacy agency. For real-time water quality information, contact WHITE HORSE RANCH OWNERS ASSOCIATION directly or review their annual Consumer Confidence Report (CCR).

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