Since Saturday night, unhealthy levels of hydrogen sulfide have been recorded, especially at the one set up at Berry Elementary, located no more than half a mile from the river.

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 ...

DENVER -- 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, ...