Newtown Creek is the waterway between Brooklyn and Queens that was a Superfund site before it was cool. It’s got a century and a half of industrial history in its sediment: oil refining, chemical manufacturing, a Greenpoint oil spill that by some estimates rivaled the Exxon Valdez, and the daily contribution of New York City’s combined sewers. If you’ve kayaked it, and people do now, you’ve kayaked over one of the most contaminated stretches of water in the country.
On September 4, DEC proposed reclassifying it from Class SD to Class I. Sounds like paperwork. It’s the opposite of paperwork. It’s the mechanism by which a press release about cleanup becomes an effluent limit with a fine attached.
What water classes are
Every waterbody in New York has a class. The class says what the water is supposed to be good for, and that “best use” sets the quality standards that apply to it. Class SD is the bottom of the saline scale: the water is supposed to support fish survival and not much else. No contact recreation expected, no fishing for food expected. Class I moves up: it adds protections for secondary-contact recreation, which means boating, kayaking, the things where you’re on the water but not in it, and it strengthens the standards for aquatic life. Fish should be able to live there, not just survive.
Here’s the part that matters for anyone who holds a discharge permit: every permitted outfall on a waterbody has effluent limits, and those limits are derived from the water’s classification. Upgrade the class, and every permit on the creek has to get tighter to match. Industrial dischargers, the city’s own sewage outfalls, anybody with a SPDES permit that lets them put something in the creek. That’s the mechanism. That’s how “landmark effort to expand water quality protections” stops being a phrase and starts being a number in a permit that a regulator can enforce.
If you ever want to know whether an environmental announcement is real, ask one question: does it change a permit limit? This one does.
The tunnel
DEC is tying the upgrade to a planned $3.4 billion combined sewer overflow storage tunnel, projected to cut overflows by about 72 percent, roughly 867 million gallons a year.
For the non-engineers: most of New York City’s older sewers carry rain and sewage in the same pipe. On a dry day, everything goes to the treatment plant. When it rains hard, the pipe can’t keep up, and the overflow, which is a mix of stormwater and raw sewage, goes straight into the nearest creek. That’s a combined sewer overflow, and Newtown Creek gets a lot of them. The tunnel is a giant holding tank underground. It catches the overflow during the storm and releases it slowly to the plant afterward.
867 million gallons is about 1,300 Olympic swimming pools of sewage-rainwater a year that stays out of the creek. I did the math so you didn’t have to. That’s the physical change that makes the reclassification plausible. You can’t upgrade the class if the creek still gets a raw sewage bath every time it rains.
Why I’m filing this under Long Island
Because reclassification is a precedent. When a bay or a creek closer to home comes up for the same move, and several should, this is the template and this is the argument. It also cuts the other way: a downgrade is the same mechanism in reverse. Know what class your local water is and what it means before somebody proposes changing it.
The comment window opens September 16. Hearings are November 16 and 19. If you hold a permit on that creek, you already know this. If you paddle it, now you do too.
What we know
- DEC proposed reclassifying Newtown Creek from Class SD to Class I, announced September 4, 2026.
- Public comment opens September 16, 2026; hearings November 16 and 19.
- Planned CSO storage tunnel: $3.4 billion, projected ~72% reduction in overflows, ~867 million gallons/year.
What we don’t know yet
- Which permitted outfalls will see tightened limits, and by how much.
- The tunnel’s construction timeline, and whether the reclassification is contingent on it.
Sources
NYSDEC press release, September 4, 2026: https://dec.ny.gov/news/press-releases/2026/9/dec-advances-next-phase-of-landmark-effort-to-expand-water-quality-protections-in-new-york-city-waters-with-proposed-newtown-creek-reclassification
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