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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 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 >  STORET >  21FLSJWM >  21FLSJWM-GAR

GUANA RIVER 100 meters south of the Dam (21FLSJWM-GAR) site data in the Water Quality Portal

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

This estuary site, maintained by the St. Johns Water Management District (Florida) (identifier 21FLSJWM), has the name "GUANA RIVER 100 meters south of the Dam" and has the identifier 21FLSJWM-GAR. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)03080201.

This site is located in St. Johns County County, Florida at 30.0208806 degrees latitude and -81.3272750 degrees longitude using the datum WGS84. 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 "21FLSJWM-GAR" 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 1997 - 2009
Information 1997 - 2009
Microbiological 1997 - 2009
Nutrient 1997 - 2009
Physical 1997 - 2009
Stable Isotopes 1998 - 2009
*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 21FLSJWM
OrganizationFormalName St. Johns Water Management District (Florida)
MonitoringLocationIdentifier 21FLSJWM-GAR
MonitoringLocationName GUANA RIVER 100 meters south of the Dam
MonitoringLocationTypeName Estuary
MonitoringLocationDescriptionText GUANA RIVER 100 meters south of the Dam
HUCEightDigitCode 03080201
LatitudeMeasure 30.0208806
LongitudeMeasure -81.3272750
HorizontalCollectionMethodName Unknown
HorizontalCoordinateReferenceSystemDatumName WGS84
CountryCode US
StateCode 12
CountyCode 109
ProviderName STORET