The major zone of recharge, especially to the Magothy and Lloyd aquifers, is along the center of the island where the water table is highest. The water system is a freshwater bubble surrounded by saltwater. There is no outside source of freshwater to the system.
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How far down is the water table on Long Island?
The total depth of the Long Island Aquifer System is shallowest on the north shore (approximately 600 feet) and deepest along the south shore (approximately 2000 feet).
Where are the aquifers on Long Island?
Long Island’s aquifer system is comprised of several freshwater zones, or “aquifers”, generally ranging in increasing depth from the upper glacial, North Shore, Jameco, Magothy, and finally the Lloyd aquifer.
What are the 3 Long Island aquifers?
The Three Major Long Island Aquifers: Nassau and Suffolk counties obtain their drinking water from three major aquifers underlying Long Island which constitute a sole source aquifer. The aquifers are, from the shallowest to the deepest, the Upper Glacial, the Magothy and the Lloyd aquifers.
How many groundwater wells are active on Long Island?
There are over 4,300 groundwater sites on Long Island that can be selected which have at least one water level measurement (depth to water measurement).
Where does Long Island get its water from?
Groundwater Aquifers
Long Island’s Only Source of Drinking Water: Groundwater Aquifers. The water that flows from every single spigot in Nassau and Suffolk County comes from groundwater aquifers and nowhere else. These aquifers are ours to protect. Nothing is more important than clean water to drink.
Does Long Island have well water?
Public Long Island Water vs. Private Wells
Aquifers – that’s where our Long Island water comes from. Whether a public water supply company provides your water or you have your own private well on your property, our only source of Long Island drinking water comes directly out of our aquifer system located beneath us.
Which County on Long Island pulls water from the Lloyd aquifer?
Suffolk County
Pumping from the Lloyd aquifer in Suffolk County is limited to a few wells on the barrier islands on the south shore and is not considered to be significant.
Is Long Island water contaminated?
“Western Nassau County is up to 17.5 parts per billion when the drinking water standard is currently 1. Also, it has all three chemicals. So unfortunately they are getting the trifecta of water contamination. “We object to the public being told that contamination in our drinking water is safe,” she continued.
Where does Suffolk County drinking water Come From?
All water the Suffolk County Water Authority delivers to customers comes from porous underground sand and gravel formations known as aquifers. There are three major aquifers found beneath Suffolk County. The deepest aquifer is the Lloyd aquifer, which ranges from 200 to 1,800 feet below land surface.
What Moraine is known as the backbone of Long Island?
Ronkonkoma moraine
The more southerly moraine, known as the Ronkonkoma moraine, forms the “backbone” of Long Island; it runs primarily through the very center of Long Island, roughly coinciding with the length of the Long Island Expressway. The land to the south of this moraine to the South Shore is the outwash plain of the last glacier.
Where does NYC water come from?
New York City gets its drinking water from 19 reservoirs and three controlled lakes spread across a nearly 2,000-square-mile watershed. The watershed is located upstate in portions of the Hudson Valley and Catskill Mountains that are as far as 125 miles north of the City. Learn more about our Water Supply System.
What is the Lloyd aquifer?
The Lloyd Aquifer is the purest, deepest and most limited aquifer serving Long Island. Long Beach relies solely on water pumped from the Lloyd, to meet the needs of 34,000 residents.
Why does the fresh groundwater rest above the salty ground water under Long Island?
Precipitation enters the groundwater system by infiltration through the porous soil at Long Island’s surface. Due to the porous soil Long Island has an immature stream development, thus a relatively high percentage of wet precipitation reaches the groundwater.
How do I check my groundwater level?
Groundwater level measurement is mostly performed by a submersible pressure transmitter. These hydrostatic level transmitters are small in diameter and directly suspended by their cable into the well, borehole, deep bore well or monitoring well.
What is Raritan clay?
The Raritan Formation consists of an upper clay member and a lower sand member (Lloyd Sand). The clay member is a confining unit and the Lloyd Sand is a confined aquifer.Under Long Island the clay member has a maximum thickness of 300 ft and the Lloyd Sand has a maximum thickness of 500 ft.
What is wrong with Long Island water?
of Health: 21 LI water providers applied for more time to remove toxic chemicals. The Water Authority of Western Nassau County sent the letter out, alerting residents that the water supply contains cancer-causing chemicals known as PFOS, PFOA and 1,4-dioxane.
Is the water on Long Island hard or soft?
Long Island residents generally experience some degree of hardness in their water. Definitionally, hard water contains a relatively high amount of dissolved minerals, particularly magnesium and calcium.
Who provides water on Long Island?
Nassau County gets all its drinking water from the water stored in the porous soil beneath Long Island. This fresh water source is called ground water. The geological formations which store the large quantities of water are called aquifers. Nassau County uses three major aquifers for its drinking water.
Is Long Island tap water filtered?
This way, you can rest assured knowing that 99.99% of contaminants are totally filtered out of your Long Island tap water, leaving you with only clean, safe results.
What does it mean when water is distilled?
purified water. Distilled water is a type of purified water that has had both contaminants and minerals removed. Purified water has had chemicals and contaminants removed, but it may still contain minerals.Distillation boils the water, and then condenses the steam back into a liquid to remove impurities and minerals.
