Public Water System

CARLTON, CITY OF

PWSID OR4100171 · Oregon · 2,270 people served

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CARLTON, CITY OF is an EPA-regulated public water system in Oregon (PWSID OR4100171). It serves an estimated 2,270 residents — a small town of customers — across 1 community across 1 ZIP code.

Over the past five years, CARLTON, CITY OF has recorded 3 EPA health-based violations. The grade of C 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

2,270

Cities

ZIPs

Violations

EPA Health-Based Violations

Health-based Maximum Contaminant Level (MCL) violations on file for CARLTON, CITY OF over the past five years of EPA SDWIS reporting.

E. Colimicrobial

EPA Code 0300 · Treatment Technique Violation

violations

EPA Limit

0 per 100 mL presence/absence

Last Reading

—

First Reported

Sep 2024

Most Recent

Sep 2024

What this violation means

E. coli detection is an EPA Tier 1 acute violation, requiring same-day public notification. It confirms that fecal matter has entered the drinking water supply, posing immediate health risks — particularly to children, the elderly, and immunocompromised individuals.

Recommended precautions

→Do not drink the water until the utility has lifted the advisory.
→Boil water for at least one minute (three minutes at elevations above 6,500 ft).
→Disinfect dishes and surfaces that touched contaminated water.
→Seek medical attention if you develop bloody diarrhea or persistent vomiting.

Read the complete guide to E. Coli

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 CARLTON, CITY OF

CARLTON

ZIP Codes Served

97111

About this system

EPA records this system as PWSID OR4100171. 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 CARLTON, CITY OF directly or review their annual Consumer Confidence Report (CCR).