EPA data: Cumulative amount of Hydrogen Sulfide UP 800 PERCENT in coastal Louisiana since well was ‘capped’ on July 15
August 24th, 2010
Hourly readings in last day have averaged 15-20 times above the EPA’s “safe exposure level”
Human Health Effects from Exposure to Low-Level Concentrations of Hydrogen Sulfide, Occupational Health & Safety, October 2007:
EPA set the safe exposure level at 0.00014 ppm. [.14 ppb]
From the CDC: The EPA is monitoring air quality in the Gulf Coast region. The maps and charts are available here.