What State has the strictest emission laws when it comes to private vehicles?
What State has the strictest emission laws when it comes to private vehicles?
user
Some states do have strict emission laws, but the strictest are California, Massachusetts, Vermont, and Maine.
assistant
What does Maine require?
user
Maine requires vehicles to have two catalytic converters, a particulate filter, and have emissions of less than 0.02 grams of nitrogen oxide per mile, 0.05 grams of hydrocarbons, and 0.01 grams of carbon monoxide.
assistant
That is crazy! Why have 2 catalytic converters?
user
Since 2002, Maine has required two catalytic converters, but one is for the new (particulate) emission standard, and one for the old (carbon monoxide and hydrocarbon) standard.  It’s important to have two converters because a malfunction of one may cause the vehicle to fail both tests.
assistant
I suppose that really helps keep the pollution out of the air.
user