COLUMBUS, Ohio — Nearly a month after a train carrying toxic chemicals derailed in East Palestine, Ohio, federal and state lawmakers are looking to prevent future railroad catastrophes. 

Ohio legislators began to dissect the derailment on Wednesday in their first hearing on the disaster, as U.S. senators introduced a bipartisan bill that would require railroads, including Norfolk Southern, to follow new safety rules. 

A Norfolk Southern train went off the tracks in northeastern Ohio on Feb. 3 after a wheel bearing overheated, spilling toxic chemicals into the air, water, and soil, according to preliminary findings from the National Transportation Safety Board. Residents evacuated their homes as the company executed a controlled release of vinyl chloride to prevent an explosion.

Now, people are back home and worried about long-term health consequences, even as officials say the air and municipal water are safe.

The derailment has sparked national criticism of railway safety and heightened attention to other derailments since, including another Norfolk Southern train that derailed in Michigan on Feb. 16 of mostly empty cars, and a derailment in Florida this week that left a tanker carrying propane turned over and tracks mangled. No leaks were detected, officials said. 

USA TODAY-IPSOS POLL:Most Americans say tougher regulation could have averted Ohio train derailment

State lawmakers question EPA officials on disaster

Ohio senators questioned officials with the Ohio Environmental Protection Agency on Wednesday about efforts to clean up the village and test air, water, and soil. State and federal agencies are conducting weekly tests on the municipal water system and continue to clean up creeks in East Palestine that were heavily contaminated.

They’ve also excavated dirty soil near the derailment and moved it off-site. Ohio EPA director Anne Vogel said the next step is for Norfolk Southern to take up the tracks and get rid of contaminated soil underneath.

“This is not an easy fix, and Americans love easy fixes,” Ohio state Sen. Michael Rulli, R-Salem, said. “That is not going to happen here. We need years of monitoring the soil and testing. We need to build a foundation for the beautiful city of East Palestine, and we need to make ourselves whole again.”