New England’s last running coal plant — the Merrimack Generating Station in Bow — was unable to complete a scheduled re-do of an emissions test it failed in February, according to state regulators.

A BUSINESS has issued an apology after smoke emissions were reported at its Warrington site during a recent test.

Unlike passenger vehicles, which require biennial smog checks in California, heavy-duty diesel trucks are not currently required to undergo regular emissions testing. That might change with the ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. ST. LOUIS, Mo. — Vehicle emissions testing ...

The amount of smoke being emitted from the wildfires burning in Canada has reached the highest-ever recorded in the country as plumes make their way across the Atlantic to Europe. The typical wildfire ...

A Milwaukee County driver who needed an emissions test to renew his license plates recently asked Public Investigator: Why are these tests still required? Public Investigator asked the Department of ...

Unless you’ve been stuck in traffic behind an old pickup belching smoke, you probably haven’t thought about vehicle emissions much this year. Chances are, the last time you worried about it was when ...