"Working Together for Healthy Soil and Clean Water"

Nassau County Soil & Water Conservation District is one of 58 county districts in NY State that provide “on the ground” assistance for soil and water resources, preservation of wildlife, and promote the health, safety, and welfare of residents in their respective communities.

Our purpose is to protect, preserve, restore, and enhance natural resources through education and technical assistance. We provide programs and technical services to all Nassau County residents and municipalities to manage our precious natural resources. The mission of conservation districts is to coordinate assistance from all available sources, public and private, local, state and federal, in an effort to develop solutions to local natural resource concerns. We help foster coordination among municipalities, schools, protection committees and county residents. There is an amazing array of projects that The NCSWCD is doing in our own backyard. 

Please explore our website and consider becoming an active member of your local Conservation District.

Register to Volunteer

Get involved with us! Click the button below to register for volunteer for events and internship opportunities in your local community.

The Nassau County Soil and Water Conservation District office is located at the Muttontown Preserve inside Nassau Hall, 1864 Muttontown Road, Syosset, NY 11791 

Download a copy of our past newsletters.


Soil and Water Districts are political subdivisions of the state. Conservation districts began with an Act of the President in 1937 called the “Standard Soil Conservation Districts Law” allowing each state to organize conservation districts. The Nassau County Soil & Water Conservation District was formed and authorized by the county in 1977.  Over 70 years since the first district was formed, there are over 3,000 conservation districts in the United States working on many aspects of resource protection and preservation.


The NCSWCD recieves funding through the NYS Environmental Protection Fund (EPF) that is set by the govenor and state legislature annually.

Click Here to read more about our funding and active projects

Nassau County at a Glance

Nassau County is a unique place to live and work. The glaciers created the Long Island we know today. The Native Americans, the island's first inhabitants, lived here for the great climate, abundant marine life, and its forests and soil for growing crops.
The first Europeans to discover Long Island stayed because of the same reasons. Nassau County was close enough to New York City to ship them agricultural goods, fish and oysters and lumber. After World War II, the open treeless farmland made for perfect building conditions for housing for the returning veterans. Today Nassau County has close to 1.4 million people living on 286 square miles that is an amazing 4,650 people per square mile.

As of 2008, Nassau County is the second richest county per capita in the State of New York and the 10th richest in the nation. You may think that it is wall to wall people, but it has some of the world’s best beaches, parks and open space. Speaking of space, Grumman aerospace was located in Bethpage and helped win wars and get us to the moon.
There are many more historical highlights that should be explored about Nassau County and Long Island, so take the time and see what it has to offer.

Natural Long Island

Long Island is a wonder of geology and natural resources and should be treated as such. From the south shore plains to the hills of the north, it contains a diversity of natural features created over the thousands of years.  Pre-glacial geologic events in the Long Island include the formation of the ancient (over 400 million year old) metamorphic bedrock that forms the foundation upon which Long Island rests, and the deposition of sand and clay on this bedrock 70 million years ago during the late Cretaceous period.

The geologic event that most greatly affected the land surface of Long Island was the advance of a massive continental glacier into this region during the Wisconsin stage of the Pleistocene Epoch. The Ronkonkoma and the later Harbor Hill are two sub-stages, or positions, of this ice sheet which occurred on Long Island. The accumulation of rock debris along these two stationary melting fronts formed two prominent ridges called terminal moraines. As the glaciers receded, the flow of the sediments created the outwash plains of the south shore.

A few perennial streams drain the county. Most of the longer streams run from the north to the estuaries in the south. A few of them are Valley Stream, Mill River, East Meadow Brook, Bellmore Creek and Massapequa Creek. The north shore drainage is mostly intermittent. Two of the longest creeks are the Glen Cove Creek and Mill Neck Creek. Much of the runoff between Route 25 and 25a enters the ground water through land locked ponds and natural depressions.

Long Island’s water supply is underground aquifers. The contour of the aquifer system is roughly the same as the land surface. The water table is closest to the surface at the terminal moraine and deeper at the coasts. The upper glacial is the closest to the surface and made up of sand and gravel from the last glacier. The deeper aquifers are the Jameco, Magothy and the Lloyd. The Lloyd is the deepest and rests on bedrock.


Nassau County At a glance


Natural Resources Management:

  • Agricultural Environmental Management (AEM)
  • Stream restoration
  • Wetland construction and restoration
  • Shoreline protection
  • Invasive Species Management


Protecting Public Health & Safety

  • Water supply protection
  • Water quality monitoring
  • Watershed and wetland protection plans


Public Involvement

  • Public participation/stakeholder advisory groups
  • Identifying key audiences
  • Communication plans
  • Consensus building
  • Coalition building
  • Networking
  • Environmental Education

Project Implementation:

  • Grant/contract administration
  • Inter-agency cooperative agreements
  • Project survey & design
  • Best Management Practice implementation on public/ private lands

Land Use Planning

  • Soil Surveys and interpretations
  • Site plan reviews
  • Stormwater Management

  • Recreation & open space planning