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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 user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  STORET >  21FLA_WQX >  21FLA_WQX-G2NE1246

St.Johns River near exchange island (21FLA_WQX-G2NE1246) site data in the Water Quality Portal

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

This estuary site, maintained by the FL Dept. of Environmental Protection, Northeast District (identifier 21FLA_WQX), has the name "St.Johns River near exchange island" and has the identifier 21FLA_WQX-G2NE1246. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)03080103.

This site is located in Duval County County, Florida at 30.3287235890 degrees latitude and -81.6120060000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolation-Photo" and the accuracy is Unknown seconds. The source map scale is 1:0.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "21FLA_WQX-G2NE1246" 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, Cyanobacteria 2025 - 2025
Biological, Algae, Phytoplankton 2025 - 2025
Information 2025 - 2025
Inorganics, Major, Non-metals 2025 - 2025
Nutrient 2025 - 2025
Organics, Other 2025 - 2025
Physical 2025 - 2025
*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 21FLA_WQX
OrganizationFormalName FL Dept. of Environmental Protection, Northeast District
MonitoringLocationIdentifier 21FLA_WQX-G2NE1246
MonitoringLocationName St.Johns River near exchange island
MonitoringLocationTypeName Estuary
HUCEightDigitCode 03080103
LatitudeMeasure 30.3287235890
LongitudeMeasure -81.6120060000
SourceMapScaleNumeric 0
HorizontalAccuracyMeasure/MeasureValue Unknown
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Interpolation-Photo
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 12
CountyCode 031
ProviderName STORET