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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-20030688

SIXMASHL (21FLA_WQX-20030688) site data in the Water Quality Portal

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

This river/stream site, maintained by the FL Dept. of Environmental Protection, Northeast District (identifier 21FLA_WQX), has the name "SIXMASHL" and has the identifier 21FLA_WQX-20030688. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)03080103.

This site is located in St. Johns County County, Florida at 29.6676900000 degrees latitude and -81.4619000000 degrees longitude using the datum UNKWN. 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 "21FLA_WQX-20030688" 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 2002 - 2022
Biological, Algae, Phytoplankton 2002 - 2022
Information 2002 - 2023
Inorganics, Major, Metals 2022 - 2022
Inorganics, Major, Non-metals 2013 - 2022
Inorganics, Minor, Metals 2022 - 2022
Inorganics, Minor, Non-metals 2022 - 2022
Microbiological 2002 - 2023
Not Assigned 2022 - 2023
Nutrient 2002 - 2022
Organics, Other 2002 - 2023
Organics, Pesticide 2022 - 2023
Physical 2002 - 2023
*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-20030688
MonitoringLocationName SIXMASHL
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText Sixteen Mile Creek at Ashley St.
HUCEightDigitCode 03080103
LatitudeMeasure 29.6676900000
LongitudeMeasure -81.4619000000
SourceMapScaleNumeric 0
HorizontalCollectionMethodName Unknown
HorizontalCoordinateReferenceSystemDatumName UNKWN
CountryCode US
StateCode 12
CountyCode 109
ProviderName STORET