Minneapolis high school swimmer invents portable device to measure chloramine levels

NPR | By Diantha Parker,

Noah Bloch

Published June 20, 2026 at 6:40 AM CDT

Indoor pools can have a distinct odor caused by chlorine binding to body waste. A Minnesota student invented a device to measure chloramine levels.

Diantha Parker

Noah Bloch

Public media depends on you.

Your support keeps Prairie Public strong and independent, serving communities across our region with programs that educate, involve, and inspire.

Donate