Beach Mystery Came From Mamaroneck Treatment Plant


Three days after starting to wash ashore, the small plastic disks that have been spotted on beaches from Rye to New Rochelle have been identified as non-dangerous equipment used at a local wastewater treatment plant.


“They are not toxic, they are not bad,” County Legislator Judy Myers told theLoop.

“They are plain, old plastic,” she said.  “In fact, they are so plain and ordinary, they are just going to be chucked.”

County Dept. of Environmental Facilities workers fill large bags with the runaway disks.

County Department of Environmental Facilities crews on Tuesday started cleaning up the disks at Playland Beach in Rye and near Dog Beach in Larchmont (pictured, right), which apparently are not harmful to shoreline wildlife, and will continue cleaning as needed, Myers said.

According to Myers, the white disks – which are about one-inch in diameter and look like mini wagon wheels – are part of a new system at the county-owned sewage treatment plant in Mamaroneck. Earlier reports that the refuse came from New Rochelle was an error by a County spokesperson.

The disks are designed to reduce the amount of nitrogen that goes into the Sound.

The disks, though not chemically treated, are placed in sewage treatment tanks, where they help neutralize nitrogen in the wastewater, which, once cleaned, is released into the Sound, she said.

Larchmont Manor Beach was also impacted

The rings, which started showing up on local beaches last Saturday, and washed in by the hundreds, possibly thousands, by Sunday, had not yet been used, Myers said. But they had already been placed into sewage treatment tanks, from which last weekend’s fierce rains washed them into the Sound, Myers said.

Earlier today, we reported that Loop readers, one in a comment below, had a good idea what the disks might be.

This article in the Block Island Times about a local “plastic circle invasion” describes something very similar…and in that case the culprit was a sewer treatment plant many miles away in Groton, CT.

Plastic parts are sifted and trashed by County DEF workers


“Groton’s plant was overwhelmed with rain, and a stainless steel screen, which was supposed to contain the cylinders, was compromised, allowing the pieces of plastic to flow out of the plant,” the March, 2010 story reads.

This is very possibly what happened to us here.

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4 thoughts on “Beach Mystery Came From Mamaroneck Treatment Plant

  1. To say they are not toxic is false, all plastics are, they say they will not hurt the environment false, the action of million of tons of sand and water on the beaches pulvarizes platic to super small size invisible to the naked eye, this pulvarized platic then becomes part of the food life and we eat, the air life and we breath, the water the life and we drink.
    The beaches in Northen New Brunswick are full for miles of these plastic rings some new, some broken, some deformed some in ribbons and in part.
    At least now I know where they are coming from, our frinds to the South.. Thanks

  2. so the rest of us knew there would be torrential rains on Sunday and Monday – so why not wait to put them in?

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