Coming from someone who owns a Bulldog, and has spent at least $1,000 in the past nine years on treatment for this very issue, I can offer this advice, do not let your dog roam freely in areas where there is an abundance of it.
I had a dog once that ate half a bag of coffee grounds and miraculously survived. Don't let your dog get into that! Caffeine can cause serious problems for pets, along with chocolate, meds, and a few surprise items around the house.
There was pictures of dogs running around in the water at the First Federal Park splash pad over the weekend. Is this a health hazard or completely normal? Is a dog the worst thing that's in the water?