‘A hidden threat’: San Mateo lawmaker warns of rising groundwater risks, seeks study funding

‘A hidden threat’: San Mateo lawmaker warns of rising groundwater risks, seeks study funding

A Bay Area lawmaker is pushing for new federal legislation to study the threat rising groundwater poses — a hidden but growing environmental danger that experts say could worsen flooding, damage infrastructure, and contaminate drinking water. U.S. Rep. Kevin Mullin, D-San Mateo, last month introduced the Groundwater Rise and Infrastructure Preparedness Act of 2025, a bipartisan bill co-authored with Rep. Andrew Garbarino, R-N.Y., that seeks $5 m…