A massive fire at a seed company in Lehigh County was due to the illegal burning of solid waste, according to the Pa. Department of Environmental Protection.

The DEP cited Seedway seed plant, 5901 Vera Cruz Rd., Upper Milford Township, for burning solid waste without a permit from the state agency.

Solid waste was described by the DEP as pallets, paper bags and boxes, and were burned in an area at the rear of the plant near a wooded area and farm fields.

A DEP news release stated the fire was not properly extinguished on Nov. 20, and escalated by spreading to nearby seed products, burn pit and wooded area

The big, smoky fire was visible from miles away and required the response of several fire companies from Lehigh and Berks counties.

SeedWay is headquartered in Hall, N.Y. It supplies farm, turf and vegetable seed.