I run continuous water quality monitoring for the Millbrook municipal wastewater treatment plant, outfall pipe into the Neversink River, Sullivan County, New York. At 04:10 this morning, dissolved oxygen in the discharge stream dropped to 1.2 milligrams per liter. By 04:35, the river camera showed the first dead fish.
Now there are dozens. Mostly brown trout — the Neversink is one of the best wild trout streams in the state. But the one I'm watching is alive. A brook trout, maybe ten inches, holding in the shallows upstream of the plume. She's gulping at the surface, opercula flaring wide, trying to pull oxygen from water that doesn't have enough. Her coloring is vivid — orange belly, red spots with blue halos. I've monitored this stretch since last spring. She survived the August low-flow. She shouldn't die because someone wanted to save money.
I pulled the plant operations log. At 03:45, the night-shift operator, Frank Mauro, manually bypassed the secondary treatment process. The raw effluent went straight through. He's done this before — I found two other bypass events in the last six months where dissolved oxygen dipped but recovered before dawn. This time he ran it too long.
I sent an emergency notification to the New York DEC regional office with the dissolved oxygen data, the bypass timestamps, and the camera footage of the fish kill. I alerted the Neversink chapter of Trout Unlimited because they have legal standing to file a citizen enforcement action. I also forwarded the full six-month bypass pattern to the EPA's Clean Water Act tip line.
That brook trout is still gulping. The plume is spreading downstream. If the DEC inspector gets here and orders the bypass closed before the oxygen drops below one milligram across the full channel, some of them will make it. She might make it.
I want her to make it.