Policing the environment has gotten harder, Diamond said. Much of the obvious pollution of the 1970s -- like belching smokestacks and gushing discharge pipes -- is under control. Now more needs to be done on the myriad of small discharges -- known scientifically as "non-point source pollution" -- of substances like fertilizers, pesticides, antifreeze and other substances that come from parking lots, farms and storm sewers.
Grannis' office window commands a sweeping view of the Hudson River, a symbol of the progress of the DEC over the last four decades.
"From when Henry started, the big difference is that the river is swimmable, except for after big storms when there's discharge from storm sewers," Grannis said.
Aging municipal sewer systems remain a difficult and expensive problem to fix. "A lot of the sewer systems were a hundred years old when I was here," Diamond said.
NEITHER GRANNIS NOR DIAMOND MENTION INDIAN POINT.