The Southwest Ohio Air Quality Agency works with businesses to achieve and maintain healthy air quality. Stack testing is used to help the Agency ensure that industrial and commercial facilities are ...

Preparation for an EPA stack test is crucial in the process of passing that test. While most of this seems common sense, it’s easy to overlook something and discover too late that you’re on the road ...

This story was originally produced by the New Hampshire Bulletin, an independent local newsroom that allows NHPR and other outlets to republish its reporting. It was a Monday in February with a low of ...