Public Water System

RAINBIRD VALLEY MWC

PWSID CA1500393 · California · 238 people served

Failing

RAINBIRD VALLEY MWC is an EPA-regulated public water system in California (PWSID CA1500393). It serves an estimated 238 residents — a rural community of customers — across 1 community across 1 ZIP code.

Over the past five years, RAINBIRD VALLEY MWC has recorded 42 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

238

Cities

ZIPs

Violations

EPA Health-Based Violations

Health-based Maximum Contaminant Level (MCL) violations on file for RAINBIRD VALLEY MWC over the past five years of EPA SDWIS reporting.

Uraniumradiological

EPA Code 4006 · Maximum Contaminant Level Exceedance

violations

EPA Limit

0.03 mg/L

Last Reading

32 PCI/L

First Reported

Jan 2021

Most Recent

Oct 2025

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

Nitratechemical

EPA Code 1040 · Maximum Contaminant Level Exceedance

violations

EPA Limit

10 mg/L

Last Reading

12 MG/L

First Reported

Jan 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.

Read the complete guide to 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 RAINBIRD VALLEY MWC

WELDON

ZIP Codes Served

93283

About this system

EPA records this system as PWSID CA1500393. 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 RAINBIRD VALLEY MWC directly or review their annual Consumer Confidence Report (CCR).