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tr3vw t1_j3mwgvy wrote

Should just be a national system that you have to get it done every five years or something. Most PA counties are way too strict when you have other states and counties that will let you put anything that moves on the road.

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Allemaengel t1_j3n2n2b wrote

It's the state being strict, counties themselves aren't involved.

The state requires vehicle owners residing in counties over a certain population threshold to have emissions inspections.

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tr3vw t1_j3o5plu wrote

Gotchya. I had no idea thats how it worked!

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crankshaft123 t1_j3o8i7f wrote

The state is trying to comply with US EPA regulations.

If the US EPA (the feds) designate a county as a "non attainment" or "severe non-attainment" area, that county is subject to emissions inspection. It's not directly tied to population-the feds don't mandate that all counties with X number or more population get emissions inspection, but higher populations generally go hand in hand with more cars and more pollution, so it works out that way.

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