When Raul Reyes Jr. steps out of his home, he can smell a burning stench emanating from the GAF asphalt shingle factory that’s been in West Dallas since he was a kid. With data reported to the Texas Commission on Environmental Quality (TCEQ), Reyes can tell it’s not just a smell in the air. It’s pollution. The plant in West Dallas is the largest industrial sulfur dioxide polluter in the whole county, according to the state of Texas 2019 official emissions inventory. The data are compiled and released by TCEQ every year but are not widely distributed or mapped out.