A cow stands next to a non-producing oil well in Caldwell County. Gas has been venting out of the well even though it no longer produces oil. Credit: Courtesy of Abigail Edgar The first readings ...

The toxic gas eyed as a possible culprit in the deaths of six dairy workers in Weld County last week is an infrequent but potentially dangerous feature of this type of agricultural work, while experts ...

Sign up for The Morning Report with all your must-read news for the day. The toxic gas turns its victims’ blood green by chemically altering proteins. Hundreds of ...

A single breath can be fatal. That chilling reality was confirmed this week when the Weld County Coroner’s office announced that six workers-including a 17-year-old high school student-died from acute ...

New state legislation aims to set stricter limits on exposure to hydrogen sulfide, a toxic gas produced by sewage. KPBS environment reporter Tammy Murga reports the change could benefit communities ...

In August, tragedy struck rural Weld County when six workers at a dairy east of Keenesburg died from exposure to hydrogen sulfide gas. On Aug. 20, Oscar Espinoza Leos, 17; Carlos Espinoza Prado, 29; ...

The first readings Abigail Edgar took of hydrogen sulfide and methane at oilfields in Caldwell County in 2021 were so high that she thought her equipment was malfunctioning. “It was off the scales.