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

WQP Home >  Providers >  STORET >  21FLJXWQ_WQX >  21FLJXWQ_WQX-JAXSJR34

ST JOHNS R MIDSTREAM OFF MANDARIN PT (21FLJXWQ_WQX-JAXSJR34) site data in the Water Quality Portal

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

This estuary site, maintained by the City of Jacksonville (identifier 21FLJXWQ_WQX), has the name "ST JOHNS R MIDSTREAM OFF MANDARIN PT" and has the identifier 21FLJXWQ_WQX-JAXSJR34. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)03080103.

This site is located in Clay County County, Florida at 30.1368933000 degrees latitude and -81.6950017000 degrees longitude using the datum NAD83. No horizontal location accuracy metadata is available.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "21FLJXWQ_WQX-JAXSJR34" 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*
Physical 1999 - 2001
*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 21FLJXWQ_WQX
OrganizationFormalName City of Jacksonville
MonitoringLocationIdentifier 21FLJXWQ_WQX-JAXSJR34
MonitoringLocationName ST JOHNS R MIDSTREAM OFF MANDARIN PT
MonitoringLocationTypeName Estuary
HUCEightDigitCode 03080103
LatitudeMeasure 30.1368933000
LongitudeMeasure -81.6950017000
HorizontalCollectionMethodName GPS-Unspecified
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 12
CountyCode 019
ProviderName STORET