Public Water System

WILLOWSIDE TERRACE WATER ASSOCIATION

PWSID CA3701995 · California · 100 people served

Poor

WILLOWSIDE TERRACE WATER ASSOCIATION is an EPA-regulated public water system in California (PWSID CA3701995). It serves an estimated 100 residents — a rural community of customers — across 1 community across 1 ZIP code.

Over the past five years, WILLOWSIDE TERRACE WATER ASSOCIATION has recorded 6 EPA health-based violations. The grade of D 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

100

Cities

ZIPs

Violations

EPA Health-Based Violations

Health-based Maximum Contaminant Level (MCL) violations on file for WILLOWSIDE TERRACE WATER ASSOCIATION over the past five years of EPA SDWIS reporting.

Leadchemical

EPA Code 5200 · Treatment Technique Violation

violation

EPA Limit

0.015 mg/L

Last Reading

—

First Reported

Oct 2024

Most Recent

Oct 2024

What this violation means

Lead is a potent neurotoxin with no safe exposure level. In drinking water it primarily enters via corroded lead service lines, lead-soldered copper pipes, and brass fixtures. Children under 6 and pregnant women face the highest risk because lead disrupts developing nervous and skeletal systems.

Recommended precautions

→Run cold tap water 30–120 seconds before drinking or cooking, especially after the tap has been unused for hours.
→Never cook with hot tap water — heat increases lead leaching from pipes.
→Use an NSF/ANSI 53 certified filter for lead removal (carbon block or reverse osmosis).
→If you have children, get blood lead levels tested by your pediatrician.

Read the complete guide to Lead

Uraniumradiological

EPA Code 4006 · Maximum Contaminant Level Exceedance

violations

EPA Limit

0.03 mg/L

Last Reading

107 PCI/L

First Reported

Apr 2023

Most Recent

Mar 2024

What this violation means

Uranium in drinking water is both a chemical toxin (kidney damage) and a radiological hazard (increased cancer risk). It's most commonly found in groundwater near uranium ore deposits or former mining activity in the Western US.

Recommended precautions

→Reverse osmosis is the gold standard for removing uranium.
→Ion exchange systems work but must be sized correctly for uranium.
→If you live near former mining sites, test for uranium even if not required.

Read the complete guide to Uranium

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 WILLOWSIDE TERRACE WATER ASSOCIATION

ALPINE

ZIP Codes Served

91903

About this system

EPA records this system as PWSID CA3701995. 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 WILLOWSIDE TERRACE WATER ASSOCIATION directly or review their annual Consumer Confidence Report (CCR).