system
Given the following post, respond as if you're commenting on Reddit:
human
[Fallout 4] Did Project Purity have any impact on places outside of the Capitol Wasteland?

Also, does the Sole Survivor have access to a G.E.C.K?
gpt
Well, the Brotherhood has apparently managed to recruit sufficient numbers of healthy people and become a significant power (even if they're back to being douchey techno-hoarders...).

But if you mean did the water help anyone... probably not, beyond exporting to areas like the Pit. Project Purifier had the ability to purify the bay, but not much beyond it. It is unclear exactly how it works, whether it's instantaneous 'magic' or an actual purification system, but considering the present radiation of the water in Boston, it's clear that in either case it hasn't had a significant impact outside the Capital Wasteland. Yet. 

>Also, does the Sole Survivor have access to a G.E.C.K?

Probably not. At least, not a real G.E.C.K. Those things were absurdly rare. As for the more common variant, again, i would probably say no... most of their agriculture is very clearly NOT of the pure-strain seed-crops that were kept in the standard G.E.C.K. package, but mutant variants of crops common in the New England states.