If the area has no PG, then PG-Off looks the same there as PG-On. These areas have PG.
But the list is already outdated, because with each WU more cities have been added. You have to look into the patch notes of the respective updates. World Update 6 , World Update 7 , World Update 8 , World Update 9 , World Update X etc … PG can usually be recognized by the fact that the scenery as a whole looks much darker (and in some cases also like ruins). 
Here you can see the difference between PG on/off:
Source: Cycu1 (youtube)