Funny, the local water treatment plant in hartford had a overflow due to excess rains that flooded the storm drains and sewers, it spilled into the CT river, so if the storm drains arn't connected to the treatment plants, then why did the plant experence the overflow from the heavy rains? Currently I'm working at foxwoods resort, even they filter and treat the storm water to prevent contamination of local lakes and steams, yes, it's a huge catch basin, about 3 million gallon capacity, the treatment guy here told me they monitor it closly and watch the PH so it doesn't destroy the bacteria. My GF is going for wetlands management, I'll ask her the skinny on treatment of run off and strom drain water, but in any case, dye is almost a nill effect. Legislation and policy is one thing, but written in black and white on paper and what really happens are sometimes two totally different things, some places catch it and treat it around here, because it's better to have something in place rather than wait till it's too late to rectify it.