2024 Yes https://doi.org/10.1542/peds.2024-067808L Leonard, Laura T. North America Observational Exposure Study Students Other Elementary (K-5) Heavy metals Other This study evaluated Colorado’s Test & Fix Water for Kids program, which tested 53,000 fixtures for lead. Seven percent exceeded 5 ppb, often unused post-COVID. Remediation through fixture replacement and signage supports reducing lead exposure in children.