Crossett air monitoring
The EPA tested the hydrogen sulfide concentrations in the air at 20 sites in Crossett. The highest and lowest two-week averages at each site during the first 16 weeks are expressed in parts of hydrogen sulfide per billion parts of air (ppb) and seen in the maps below. "ND" means the average was below 0.57 ppb, too low to detect. Workplace sites are in pink; community sites are in blue.