Residents of Agrola village alleged that groundwater was being contaminated and posing health hazards as they held up traffic on the Delhi-Saharanpur and other arterial roads leading to the Tronica City industrial area.
Later, Loni SHO Gorakh Nath Yadav reached the spot and pacified the agitators. He also assured them of action over their demands.
"All the units not following pollution control board regulations will be identified," said Yadav.