PFAS in San Marino, CA Drinking Water
PFAS data for San Marino, California · 12,464 residents · 2 ZIP codes
At elevated levels, PFAS is a recognized health concern in drinking water; in San Marino, California, it has been detected in recent samples logged through federal compliance reporting.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-04-05
PFAS in San Marino Tap Water
PFAS has been detected in San Marino, California drinking water at a maximum level of 0.0053 ppt — below the EPA MCL of 4 ppt (PFOA/PFOS individually).
This analysis covers 12,464 residents across 2 ZIP codes in San Marino.
San Marino's overall water quality grade is B (75/100).
Is PFAS in San Marino Water Safe?
PFAS was detected in San Marino water but currently falls within EPA limits. However, some health organizations argue the EPA MCL may not be protective enough.
If you are concerned, a reverse osmosis or granular activated carbon filter can reduce pfas levels further.
PFAS Levels by ZIP Code
| ZIP Code | PFAS Level | EPA Limit | Status |
|---|---|---|---|
| 91108 | 1 detections | 4 ppt (PFOA/PFOS individually) | OK |
Average pfas level across San Marino: 1 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 San Marino Water
- Install a reverse osmosis system (most effective — removes 90%+ of PFAS)
- Granular activated carbon (GAC) filters remove some PFAS compounds
- Look for NSF 53 or NSF 58 certification specifically tested for PFAS
- Pitcher filters with activated carbon provide partial reduction
Look for filters certified under NSF 53 / NSF 58 for pfas removal.