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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 >  21FLCEN_WQX >  21FLCEN_WQX-20010446

L MARKHAM CTR OF S LOBE S OF SR4 (21FLCEN_WQX-20010446) site data in the Water Quality Portal

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

This lake site, maintained by the Fl Dept. of Environmental Protection, Central District (identifier 21FLCEN_WQX), has the name "L MARKHAM CTR OF S LOBE S OF SR4" and has the identifier 21FLCEN_WQX-20010446. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)03080101.

This site is located in Seminole County County, Florida at 28.7965278000 degrees latitude and -81.3940278000 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 "21FLCEN_WQX-20010446" 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 2007 - 2007
Biological, Algae, Phytoplankton, Photosynthetic Pigments 2007 - 2007
Information 2007 - 2007
Inorganics, Major, Metals 2007 - 2007
Inorganics, Major, Non-metals 2007 - 2007
Inorganics, Minor, Metals 2007 - 2007
Inorganics, Minor, Non-metals 2007 - 2007
Microbiological 2007 - 2007
Nutrient 2007 - 2007
Organics, Other 2007 - 2007
Physical 2007 - 2007
*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 21FLCEN_WQX
OrganizationFormalName Fl Dept. of Environmental Protection, Central District
MonitoringLocationIdentifier 21FLCEN_WQX-20010446
MonitoringLocationName L MARKHAM CTR OF S LOBE S OF SR4
MonitoringLocationTypeName Lake
MonitoringLocationDescriptionText SEGMENT 20.1EA BODY OF WATER: LAKE, MARKHAM LAKE MARKHAM CENTER OF SOUTHERN LOBE OF LAKE - LAKE LOCATED WEST OF CITY OF SANFORD JUST SOUTH OF S.R.# 46 BOUNDED ON THE WEST & SOUTH BY LONGWOOD-MARKHAM RD.- SEMINOLE CO. MIGRATED FROM LEGACY STORET AGENCY CODE (21FLA ) ON 17-JUN-99 MAJOR BASIN NAME: SOUTH-EAST BASIN CODE: MINOR BASIN NAME: ST JOHNS
HUCEightDigitCode 03080101
LatitudeMeasure 28.7965278000
LongitudeMeasure -81.3940278000
HorizontalCollectionMethodName Unknown
HorizontalCoordinateReferenceSystemDatumName UNKWN
CountryCode US
StateCode 12
CountyCode 117
ProviderName STORET