What I found interesting that in spite of all the state and local agencies at work, a little known, but very important group of people also work on pollution: The RiverKeepers provide local monitoring. Check out http://waterkeeper.org/ the alliance of 162 regional U.S. river programs to see what is happening near you.
The Chesapeake Bay Foundation headquarters building, The Merrill Center, represents what 'green' should look like. Designed 100% green it has gorgeous architecture on a picturesque site on the Bay. They practice what they preach: reduced use of water and waste water pollution, geothermal energy, solar cells, cisterns. A link to their website building tour follows. Click though on the >>