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Research & Results

Stories and findings from LA's community microplastic water testing project.

March 30, 2026

We Tested 7 Bottled Water Brands for Microplastics. Here's How Much Plastic You're Drinking.

We bought Dasani, Liquid Death, Fiji, Evian, Crystal Geyser, San Pellegrino, and Path from a grocery store in LA. Every single one had microplastics. The aluminum cans were just as bad as the plastic bottles.

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March 9, 2026

How UCLA Proved Your Phone Can Detect Microplastics

A peer-reviewed UCLA study validated the exact fluorescence imaging method we use to detect microplastics in your tap water — down to 10 microns, using a smartphone camera.

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February 22, 2026

Your Pipes Are Plastic (And They're Dissolving Into Your Water)

Most LA homes were re-piped with PEX — a plastic pipe. Chlorine in the water degrades it, and the pipe sheds microplastic particles directly into your tap. Here's what a licensed plumber and our data are telling us.

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November 15, 2025

We Tested 20+ Homes Across West LA for Microplastics — Here's the Map

Fluorescence microscopy results from 20+ residential tap water samples across West LA neighborhoods. Every sample contained microplastics.

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Results are for informational purposes only and are specific to the sample provided at the time of testing.

© 2026 The Water MapAn open community science project mapping microplastics in LA tap water.