A massive wildfire that burned for more than eight hours near the former Khimik plant outside Asenovgrad has been brought under control, while air quality measurements found no dangerous pollution, authorities said.

According to the Regional Inspectorate for Environment and Water, a mobile automatic air quality monitoring station did not detect any exceedances of measured pollution indicators after the blaze. A specialized mobile chemical laboratory deployed at the scene also reported no hazardous concentrations of harmful substances in the air.

The fire broke out overnight in dry grass near the former industrial site on the road toward the village of Mominsko. Fueled by strong winds, the flames spread rapidly across nearly 200 acres of industrial yards and surrounding areas, threatening a plastic processing facility as well as the nearby villages of Kozanovo and Boyantsi.

The blaze also reached part of Asenovgrad's municipal landfill and a warehouse used for finished products. Burning plastic materials produced the thick smoke that spread across the area overnight. Despite the intensity of the fire, firefighters managed to prevent it from reaching the main production buildings and neighboring facilities.