According to the Washington State Department of Ecology, the entire US portion of Puget Sound is a no-discharge zone as of May 10, 2018. So that's that, after years of bickering. As far as I know, there is still some uncertainty as to what constitutes a disabled discharge system, with the Coast Guard having discretion when they board your boat.
I don't know what the Canadian rules are.
Thanks for the update.
Here is a link. Same "enforcement" as for any other private vessel in coastal and connecting waterways.
https://ecology.wa.gov/Water-Shorelines/Puget-Sound/No-discharge-zone
The legality of the US boat device ban has always been shaky at best, but the actual enforcers are armed and their conviction rate is probably rather high. The irony is that very few Coasties enjoy that part of their basic SAR mission.
Note the line on their chart. All (100%) of the sewage from the BC outfall pipe is obliged to stay north and west of that international demarkation line. That discharge used to be described as six million gallons per day, only a few years ago.
The province is now working on a secondary treatment discharge scheme which is supposed to render the discharges less objectionable. On our side the smallest polluters, like small boat owners, are getting "blocked up", pun alert, but the larger industrial and municipal sources seem to get away with more pollution. No surprise.
For many years now, Oregon boaters have bypassed Washington state waters for expensive tax reasons to spend more vacation time in BC. Now there will be additional motivation.
ps: for some reason I am remembering that PS was already so designated, for recreational boaters. (?) Maybe it's one more thing I believe that's not so.