re: Cape ponds and John's Q - MOTS, if nothing much has changed from the 70's. I remember a big worry back then about acid, etc., and where it traveled from. Well, the west to east jet stream hasn't reversed direction, manufacturing and smokestacks go together and both still exist in Middle America, so any pond from here back to the Mississippi is gonna have mercury/lead/pcb/ - I better stop - I'm about to start using symbols -
Obvious point is not that much has changed. State DFW Westboro office may still have a list/rating of water quality.