Millstone River at Blackwells Mills NJ - 01402000
Continuous water-quality measurements are collected seasonally (May 1 through November 30).
Scale
Continuous data
Millstone River at Blackwells Mills NJ - 01402000
Subscribe to WaterAlert April 9, 2025 - April 16, 2025
Gage height, feet
2.47 ft - Apr 16, 2025 07:15:00 AM EDT
Important Data may be provisional
Value
Status
Time
Latest value
2.47 ft
Provisional
Apr 16, 2025
07:15:00 AM EDT
Selected
2.47 ft
Provisional
Apr 16, 2025
07:15:00 AM EDT
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Median
No median data for this data type
Statistics are not available at this monitoring location for the data type: Gage height, ft
Available data
Select data types to graph from categories based on the way the data were collected.
Learn about the data collection categories Continuous data
10 data types available - data from 1981-10-01 to 2025-04-16
Continuous data are collected via automated sensors installed at a monitoring location.
Data type
Data date range
Gage height, feet
2007-10-01 - 2025-04-16
Discharge, cubic feet per second
1981-10-01 - 2025-04-16
Chlorophyll relative fluorescence (fChl), water, in situ, relative fluorescence units (RFU)
2020-07-24 - 2024-12-02
Dissolved oxygen, water, unfiltered, milligrams per liter
2022-08-01 - 2024-12-02
Dissolved oxygen, water, unfiltered, percent of saturation
2022-08-01 - 2024-12-02
pH, water, unfiltered, field, standard units
2022-08-01 - 2024-12-02
Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)
2020-07-24 - 2024-12-02
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
2022-08-01 - 2024-12-02
Temperature, water, degrees Celsius
2020-07-24 - 2024-12-02
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)
2022-08-01 - 2024-12-02
Daily data
8 data types available - data from 1921-08-04 to 2025-04-15
Field measurements - Coming soon
0 data types available
Discrete sample data
0 observed properties (data types) available
- Monitoring Location
- Active Monitoring Locations
5 km
3 mi
Leaflet USGS The National Map: National Boundaries Dataset, 3DEP Elevation Program, Geographic Names Information System, National Hydrography Dataset, National Land Cover Database, National Structures Dataset, and National Transportation Dataset; USGS Global Ecosystems; U.S. Census Bureau TIGER/Line data; USFS Road data; Natural Earth Data; U.S. Department of State HIU; NOAA National Centers for Environmental Information. Data refreshed February, 2025.
Interested in understanding how to access the upstream/downstream data? Learn about the Network-Linked Data Index (NLDI)
| USGS Parameter Group | Data Types | Start Date | End Date |
|---|---|---|---|
| Biological | Water-quality | 2000-05-24 | 2023-09-29 |
| Information | Water-quality | 1978-07-18 | 2024-02-21 |
| Inorganics, Major, Metals | Water-quality | 1923-08-12 | 2023-08-29 |
| Inorganics, Major, Non-metals | Daily Values, Unit Values, Water-quality | 1923-08-12 | 2024-12-02 |
| Inorganics, Minor, Non-metals | Water-quality | 1963-04-09 | 2023-08-29 |
| Inorganics, Minor, metals | Water-quality | 1923-08-12 | 2023-08-29 |
| Microbiological | Water-quality | 1976-03-24 | 2024-01-11 |
| Nutrient | Water-quality | 1923-08-12 | 2023-08-29 |
| Organics, PCBs | Water-quality | 1976-05-11 | 2023-08-29 |
| Organics, PFAS | Water-quality | 2020-03-10 | 2022-02-09 |
| Organics, other | Water-quality | 1962-08-24 | 2023-08-29 |
| Organics, pesticide | Water-quality | 1968-10-25 | 2023-05-16 |
| Physical | Daily Values, Unit Values, Water-quality | 1921-08-04 | 2025-04-16 |
| Radiochemistry | Water-quality | 2010-06-14 | 2010-06-14 |
| Sediment | Water-quality | 1968-03-13 | 2022-09-27 |
| Stable Isotopes | Water-quality | 2002-08-15 | 2002-08-15 |
| n/a | Peak Measurements | 1921-08-08 | 2022-04-08 |
| n/a | Site Visits | 1966-10-20 | 2025-02-25 |
| n/a | USGS Annual Water Data Reports Site | 2006-01-01 | 2024-01-01 |
Monitoring location 01402000 is associated with a Stream in Somerset County, New Jersey. Current conditions of Discharge and Gage height are available. Water data back to 1921 are available online.
| Metadata Element | Location Metadata | Metadata Code |
|---|---|---|
|
Agency
|
U.S. Geological Survey | USGS |
|
Site identification number
|
01402000 | n/a |
|
Site name
|
Millstone River at Blackwells Mills NJ | n/a |
|
Site type
|
Stream
|
ST |
| DMS latitude | 402830 | n/a |
| DMS longitude | 0743433 | n/a |
| Decimal latitude | 40.475 | n/a |
| Decimal longitude | -74.5758333 | n/a |
|
Latitude-longitude method
|
Interpolated from MAP. | M |
|
Latitude-longitude accuracy
|
Accurate to + or - 1 sec. | S |
|
Latitude-longitude datum
|
North American Datum of 1983 | NAD83 |
| Decimal Latitude-longitude datum | North American Datum of 1983 | NAD83 |
|
District
|
New Jersey | 34 |
|
State
|
New Jersey | 34 |
|
County
|
Somerset County | 035 |
| Country | US | n/a |
| Land net location description | Hillsborough Township | n/a |
| Name of location map | Monmouth Junction | n/a |
| Scale of location map | 24000 | n/a |
| Altitude of Gage/land surface | 26.97 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
|
Raritan | 02030105 |
|
Drainage basin
|
n/a | |
|
Topographic setting
|
n/a | |
| Flags for instruments at site | YNYYYNNNNNYNNNNNNNNNNNNNNNNNNN | n/a |
|
Date of first construction
|
n/a | |
| Date site established or inventoried | 20010824 | n/a |
|
Drainage area
|
258 square miles | n/a |
| Contributing drainage area | n/a | |
| Time Zone abbreviation | EST | n/a |
|
Site honors Daylight Saving Time
|
Y | n/a |
|
Data reliability
|
n/a | |
| 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 |
