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Minneapolis high school swimmer invents portable device to measure chloramine levels

NPR | By Diantha Parker,
Noah Bloch
Published June 20, 2026 at 4:40 AM MST

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

Copyright 2026 NPR
NPR News
Diantha Parker
Noah Bloch