Quick question after a game yesterday with Dunwich and Innsmouth: Some Mythos card say for instance "All Investigators in Arkham lose X sanity" or an Environment card that add effects "in Arkham"…

My question is are the Dunwich and Innsmouth boards considered to be in Arkham?
 

Yes.

From the Dunwich rules, page 5 / the Innsmouth rules, page 6:

The Phrase “in Arkham” on Cards
Cards that refer to “Arkham” also apply to locations and areas in Dunwich / Innsmouth. So, for example, an Environment card that adds +1 to Fight checks and subtracts –1 from Will checks in Arkham also affects investigators who are in a Dunwich / Innsmouth street area or location.

Yeah, "In Arkham" is generally just "not in an Other World location," as opposed to being in Arkham proper.

What about the Outskirts.

alboy said:

The Outskirts are not included in Arkham. If something affects the Outskirts, it's always stated explicitly. Here's an example from the FAQ:

Q: When a Mythos Card says all Chthonians and Dholes in Arkham are returned to the cup, does the Outskirts count as “in Arkham?”

A: No.

Thanks, l never even knew the new FAQ was released, l like many others had given up on it even happening.