Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

New WQX 3.0 profiles are available at waterqualitydata.us/beta/. These profiles will contain recent USGS data added since March 11, 2024, which marks the beginning of limited accessibility for USGS data. Read more about the 3.0 profiles and associated changes here.

This legacy user interface will continue to function for several weeks. However, this user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  NWIS >  USGS-NY >  USGS-01304000

NISSEQUOGUE RIVER NEAR SMITHTOWN NY (USGS-01304000) site data in the Water Quality Portal

Data Provider: NWIS (Learn more about Water Quality Portal Data Providers)

This stream site, maintained by the USGS New York Water Science Center (identifier USGS-NY), has the name "NISSEQUOGUE RIVER NEAR SMITHTOWN NY" and has the identifier USGS-01304000. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)02030201. See more details of this site the the USGS NWIS Web page for this site. This site has a drainage area of 27.0 sq mi.

This site is located in Suffolk County County, New York at 40.84991667000000 degrees latitude and -73.2242222000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from Digital MAP." and the accuracy is .1 seconds. The source map scale is 1:24000. This site is at an elevation of 9.59 feet and the accuracy of the elevation measurement, collected using the method "Level or other surveyed method." is .01 feet. The vertical coordinate reference system is NGVD29.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-01304000" into the "Site ID" box under Site Parameters

What other monitoring locations are upstream or downstream from this one?

Upstream and downstream locations

This map shows all Water Quality Portal stations that are 10 miles upstream (dashed dark blue) and 10 miles downstream (solid light blue) of this monitoring location (indicated by the large blue circle). The upstream and downstream functionality is provided by the Network Linked Data Index.

When were data collected at this location?

Periods of record for data characteristic groups

For a more detailed breakdown of data, go to the Monitoring Report at the EPA How's My Waterway Application
Characteristic Group Date Range*
Biological, Algae, Phytoplankton 1978 - 1981
Biological, Algae, Phytoplankton, Cyanobacteria, Periphyton 1978 - 1980
Biological, Algae, Phytoplankton, Photosynthetic Pigments 1978 - 1980
Biological, Counts 1978 - 1981
Biological, Photosynthetic Pigments 1978 - 1980
Information 1970 - 2022
Inorganics, Major, Metals 1967 - 2022
Inorganics, Major, Non-metals 1967 - 2022
Inorganics, Minor, Metals 1967 - 2022
Inorganics, Minor, Non-metals 1972 - 2022
Microbiological 1978 - 1993
Nutrient 1967 - 2022
Organics, Other 1967 - 2021
Organics, Pesticide 1988 - 2021
Physical 1967 - 2022
Radiochemical 1981 - 2022
Sediment 1978 - 1997
Stable Isotopes 1994 - 1995
*Date ranges may contain gap years

What other information is available for this location?

Detailed Metadata

For the definitions of the metadata elements, please go to the Water Quality Portal user guide

Location Metadata Value
OrganizationIdentifier USGS-NY
OrganizationFormalName USGS New York Water Science Center
MonitoringLocationIdentifier USGS-01304000
MonitoringLocationName NISSEQUOGUE RIVER NEAR SMITHTOWN NY
MonitoringLocationTypeName Stream
HUCEightDigitCode 02030201
DrainageAreaMeasure/MeasureValue 27.0
DrainageAreaMeasure/MeasureUnitCode sq mi
LatitudeMeasure 40.84991667000000
LongitudeMeasure -73.2242222000000
SourceMapScaleNumeric 24000
HorizontalAccuracyMeasure/MeasureValue .1
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Interpolated from Digital MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 9.59
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue .01
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName Level or other surveyed method.
VerticalCoordinateReferenceSystemDatumName NGVD29
CountryCode US
StateCode 36
CountyCode 103
ProviderName NWIS