Live Data
What We're Finding in LA Tap Water
Real-time distribution from 50+ tap water samples across Los Angeles. Updated as new results come in.
Particle Count Distribution
How many samples fall in each range
Percentiles
Where different cutoffs fall in our dataset
Results by Tier
How samples distribute across our particle count tiers
By Neighborhood
Average particle count where we have 2+ samples
Download the dataset
Free. Open. No paywall, no signup, no API key. Audit the numbers yourself.
Public results CSV
All 48 public test results: particle count, neighborhood, zip, source, date.
We publish the underlying dataset because the dataset is the proof. If you don't trust our charts, run the numbers yourself. If you spot something wrong, tell us.
All data is from public, non-baseline tap water samples processed using Nile Red fluorescence staining. Particle counts are per 100mL. No federal safety standard exists for microplastics in drinking water. This page updates automatically as new results are added.