10/17/2024
WT Staff
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October 17, 2024 1003 am EDT
Record high flow levels in Croton watershed
Streamflow Situation from the USGS network of streamflow gauges
Sunny and clear, high 58 today for the city with frost and fog upstate. Releases from New Croton Dam are associated with record high flow volume for Muscoot River and East Branch Croton River for this date.
Delaware River watershed continues to report two tributaries with flow above the 90th percentile for this date, Neversink River and East Branch Delaware River. Ramapo River watershed remains below seasonal normal on the drought map with three stations running below 10th percentile. Northeast streamflows remain normal to above normal with more clearing of drought conditions overnight. Lake Ontario minor tributaries west section remains the lone west state watershed left on the drought map, rated below normal. Susquehanna River remains the single below normal area in the south-facing watersheds. In the north, Black River watershed is relieved of drought rating overnight, leaving adjacent St Lawrence River watershed below normal in the surface drained by Oswegatchie River and tributaries. Lake Champlain watershed remains below normal through the north half of Washington and southeast Essex Counties. Lower Hudson River is rated below normal through Dutchess County and east Orange County. Long Island Sound watershed remains below normal in south Westchester and Richmond Counties again today.
As of this report, there are no extreme high (99th percentile) or low (1st percentile) flows recorded in the network.
Safe Drinking Water Advisories
New York County: From the US Army Corps of Engineers, "The water supply for the City of New York is composed of three watershed systems. Together, these systems provide water for 8 million residents in New York City, as well as 1 million residents north of the City. The Catskill and Delaware systems lie west of the Hudson River, covering an area of approximately 2000 square miles. The Croton System, which includes the New Croton and Middle Branch Reservoirs, is east of the Hudson River. "
New Croton Dam impounds fresh water in the Croton Reservoir for New York City drinking water, the infrastructure of drinking water distribution, storm water and sewage is managed by NYS Environmental Protection, according to public information online, "We maintain over 6,800 miles of in-city water mains, 109,000 fire hydrants, 148,000 catch basins, and 7,500 miles of in-city sewers. Water service disruptions are often caused by construction, water or sewer main breaks, or blockages in the pipes."
As water disruptions occur, boil water advisories are issued to ensure the safety of the water until the situation has resolved and testing determines the water in the lines meets the quality standards for potable water. According to NYS Dept of Health, "A boil water notice is issued by water utilities or health agencies as a precaution to protect consumers from drinking water that may have been contaminated with disease causing organisms (also called pathogens). Boil water notices are typically issued when an unexpected condition has caused a potential for biological contamination of water in a public water system. Common reasons for a boil water notice include loss of pressure in the distribution system, loss of disinfection, and other unexpected water quality problems. These often result from other events such as water line breaks, treatment disruptions, power outages and floods."
For more information on NYS drinking water, see the NY Boil Water Advisory FAQ, here.
WT HAB Tracker from the satellite monitoring program of the NOAA National Centers for Coastal Ocean Science(NCCOS) and NYS DEC
New York
Sixty two active HABs remain statewide Thursday as reports made prior to Oct 3 transfer to the archive list for the season. Yesterday saw the return of The Lake in Central Park and Roaring Brook Lake to the actively impacted list. Our impacted water body list is rolling over to a combined active and archive list, here.
The latest satellite image of Lake Champlain was captured Oct 16, this one completely cloud obscured. The last clear view with any sign of HAB activity was October 8, the HAB activity seen in Vermont's Lake Carmi, nothing showing in Lake Champlain. See the NCCOS color image of Lake Champlain here.
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