For residents of Los Alamitos, California, PFAS has appeared in public water supply sampling data.

Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14

PFAS in Los Alamitos Tap Water

PFAS has been detected in Los Alamitos, California drinking water at a maximum level of 9.9 ppt — 2.48x the EPA MCL.

This analysis covers 174,226 residents across 2 ZIP codes in Los Alamitos.

Los Alamitos's overall water quality grade is C (66/100).

Is PFAS in Los Alamitos Water Safe?

If you live in an affected ZIP code, consider installing a reverse osmosis or granular activated carbon filter certified under NSF 53 / NSF 58 and testing your water independently.

PFAS Levels by ZIP Code

Average pfas level across Los Alamitos: 14.08 ppt

Health Effects of PFAS

• Increased risk of kidney and testicular cancer
• Thyroid disease and immune system suppression
• Reproductive problems and reduced fertility
• Elevated cholesterol and liver effects
• Developmental effects in infants and children

Health risk severity: High. Governed by the PFAS National Primary Drinking Water Regulation (2024).

How PFAS Gets Into Drinking Water

• Firefighting foam (AFFF) used at military bases and airports
• Industrial manufacturing (non-stick coatings, stain-resistant fabrics)
• Wastewater treatment plants that receive industrial discharge
• Landfill leachate from PFAS-containing consumer products

What to Do About PFAS in Los Alamitos Water

1. Install a reverse osmosis system (most effective — removes 90%+ of PFAS)
2. Granular activated carbon (GAC) filters remove some PFAS compounds
3. Look for NSF 53 or NSF 58 certification specifically tested for PFAS
4. Pitcher filters with activated carbon provide partial reduction

Look for filters certified under NSF 53 / NSF 58 for pfas removal.

Related

• PFAS — National Overview
• PFAS in California
• California Water Quality
• Los Alamitos Water Quality
• Check Your ZIP Code