Pictures of Hurricane Irene's destruction are circulating and making many of us realize we're lucky to still have our homes and power lines intact. There's also one Irene-related problem that's invisible to the naked eye: raw sewage in waterways. Here's the Washington Post's Darryl Fears on local contamination:
DC Water officials estimate that 200 million gallons of rain mixed with raw sewage overwhelmed pumping stations and poured into waterways around the city during the downpour from Hurricane Irene.
The sewer overflow contributed to a flood of wastewater into rivers and streams over the…