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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Legacy real-time page

USGS Parameter Group Data Types Start Date End Date
Information Water-quality 1970-11-03 1974-01-08
Inorganics, Major, Metals Water-quality 1966-04-22 1976-09-29
Inorganics, Major, Non-metals Water-quality 1966-04-22 1976-09-29
Inorganics, Minor, Non-metals Water-quality 1972-04-19 1974-04-02
Inorganics, Minor, metals Water-quality 1966-04-22 1976-09-29
Nutrient Water-quality 1966-04-22 1976-09-29
Organics, other Water-quality 1966-04-22 1976-09-29
Physical Daily Values, Unit Values, Water-quality 1966-04-22 2024-11-25
n/a Peak Measurements 2015-12-17 2023-09-29
n/a Site Visits 1937-09-12 2024-10-03
n/a USGS Annual Water Data Reports Site 2014-01-01 2023-01-01
Water Data for the Nation inventory

Monitoring location 01309990 is associated with a Stream in Nassau County, New York. Current conditions of Discharge and Gage height are available. Water data back to 1937 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
01309990 n/a
Site name
BELLMORE CREEK TRIBUTARY AT BELLMORE NY n/a
Site type
Stream
ST
DMS latitude 404048.4 n/a
DMS longitude 0733046.8 n/a
Decimal latitude 40.6801111 n/a
Decimal longitude -73.513 n/a
Latitude-longitude method
Interpolated from Digital MAP. N
Latitude-longitude accuracy
Accurate to + or - .1 sec (Differentially-Corrected GPS). 1
Latitude-longitude datum
North American Datum of 1983 NAD83
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
New York 36
State
New York 36
County
Nassau County 059
Country US n/a
Land net location description n/a
Name of location map FREEPORT, NY n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface 16.96 feet n/a
Method altitude determined Level or other surveyed method. L
Altitude accuracy .01 feet n/a
Altitude datum
National Geodetic Vertical Datum of 1929 NGVD29
Subbasin hydrologic unit
Southern Long Island 02030202
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site YNNNYNNNNNNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried n/a
Drainage area
n/a
Contributing drainage area n/a
Time Zone abbreviation EST n/a
Site honors Daylight Saving Time
N n/a
Data reliability
Minimal data. M
Data-other GW files NNNNNNNN n/a
National aquifer n/a
Local aquifer n/a
Local aquifer type
n/a
Well depth n/a
Hole depth
n/a
Source of depth data n/a
Project number n/a

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logo for Nassau County Office of Emergency Management
Nassau County Office of Emergency Management