This dataset includes all data pertaining to the paper, "Hydrogen Sulfide Emission Properties from Two Large Landfills in New York State". It includes the longitude, latitute, and raw and corrected 1 min H2S and enhanced CH4 mixing ratios. H2S ratios are in parts per billion (ppb) and CH4 is in parts per million (ppm). The raw H2S data is background-adjusted and smoothed using a median filter, and the enhanced CH4 data is the raw data above background.