New York Water Science Center

Groundwater and Streamflow Information

Groundwater and surface water are among the Nation’s most important natural resources. The USGS provides unbiased, timely, and relevant information, studies, and data about water resources of the Nation. The NYWSC maintains a network of more than 300 surface water and 650 groundwater monitoring stations across New York State; over the years, the USGS has collected water-resources data at approximately 1.5 million sites in all 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands. The data collected at the various sites are synthesized in State-level, interstate, and international studies to evaluate resources not only in one State but also other States and countries that might be affected or may influence the condition of surface water and groundwater. The data collected are used in studies of water supplies, groundwater contamination, flooding, water stored in ice and the oceans, and the effects of climate and land use change and manmade influences.

Filter Total Items: 105
Date published: August 11, 2017
Status: Active

New York State Flood Investigations

Flooding can be a serious problem in many parts of New York State. Information on floods and analyses of flood data are needed to aid in the design of bridges, culverts, dams, highways, and buildings, and for the prudent management of flood-prone areas. Documentation of floods and a more thorough understanding of flood hydrology and hydraulics will result in more effective management of flood...

Contacts: Gary Wall
Date published: July 27, 2017
Status: Active

New York Drought Information

New York Drought Information: definitions, information resources, maps, and tools

Date published: July 7, 2017
Status: Active

Well Selection Information for Homeowners and PWS Personnel

Well Selection Information for Homeowners and PWS Personnel

Date published: July 5, 2017
Status: Active

Analytes 2018

Samples are analyzed for a wide range of constituents, including physical parameters (such as pH and temperature), nutrients, major ions, trace elements including mercury and arsenic, Coliform bacteria, radon, total organic carbon, volatile organic compounds, and pesticides

Date published: July 4, 2017
Status: Active

Groundwater Sample Collection Methods

Collecting groundwater samples from a typical homeowner well...

Date published: June 8, 2017

Long Island - Location and Physical Setting

Long Island, the eastern-most part of New York State, extends east-northeastward roughly parallel to the Connecticut coastline. It is bounded on the north by Long Island Sound, on the east and south by the Atlantic Ocean, and on the west by New York Bay and the East River. Long Island is joined to the mainland specifically, to the Borough of the Bronx, which is one of the five boroughs of New...

Contacts: Jack Monti
Date published: June 7, 2017

Long Island Topography

The present landforms of Long Island are the result of many geologic processes, some of which began many millions of years ago and some of which began only recently. Most of the major features of the present-day topography, however, are related to the last glaciation, which ended approximately 22,000 years ago.

Contacts: Jack Monti
Date published: June 6, 2017
Status: Completed

Long Island Population

About 7.56 million people lived on Long Island in 2010. Of these, about 2.50 million are in Kings County, 2.23 million in Queens County, 1.34 million in Nassau County, and 1.49 million in Suffolk County.

Contacts: Jack Monti
Date published: June 5, 2017

Long Island Land Use and Land Cover

On Long Island, land use includes the human activities and management practices for which land is used. Land cover is a mosaic of developed, forest, agriculture, and wetlands areas. Both land use and land cover are usually discussed in similar environments. The National Land Cover Database (NLCD) serves as the definitive LANDSAT-based, 30-meter resolution, land cover database for the Nation....

Contacts: Jack Monti
Date published: June 4, 2017

Long Island Freshwater

Long Island is surrounded by an almost limitless amount of saltwater in the Atlantic Ocean, in the Long Island Sound, and in the many bays bordering Long Island. Although the salty water is important to the economy of the area and is of significant recreational value, this website is mainly concerned with the fresh water of Long Island, which from many standpoints, is even more important than...

Contacts: Jack Monti
Date published: June 2, 2017

Long Island Precipitation and Recharge

Precipitation is water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. It is the primary connection in the water cycle that provides for the delivery of atmospheric water to the Earth. Most precipitation falls as rain. 

Water seeping down from the land surface and reaching the water table adds to the groundwater and is called groundwater recharge....

Contacts: Jack Monti
Date published: June 1, 2017

Long Island Surface Water

Streams either gain water from inflow of groundwater from the underlying aquifer or lose water by outflow to the underlying aquifer. Many streams do both, gaining in some reaches and losing in other reaches. Furthermore, the groundwater flow directions near any given stream can change seasonally as the altitude of the water table changes with respect to the stream-surface altitude or when...

Contacts: Jack Monti