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 >  11NPSWRD_WQX >  11NPSWRD_WQX-THST_L1_4520

Hoghole Run Tributary near Port Tobacco, MD (11NPSWRD_WQX-THST_L1_4520) 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 National Park Service Water Resources Division (identifier 11NPSWRD_WQX), has the name "Hoghole Run Tributary near Port Tobacco, MD" and has the identifier 11NPSWRD_WQX-THST_L1_4520. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)02070011.

This site is located in Charles County County, Maryland at 38.5267876000 degrees latitude and -77.0424755000 degrees longitude using the datum NAD83. No horizontal location accuracy metadata is available. This site is at an elevation of 65 ft No vertical location accuracy metadata is available.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "11NPSWRD_WQX-THST_L1_4520" 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*
Nutrient 1999 - 2000
*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 11NPSWRD_WQX
OrganizationFormalName National Park Service Water Resources Division
MonitoringLocationIdentifier 11NPSWRD_WQX-THST_L1_4520
MonitoringLocationName Hoghole Run Tributary near Port Tobacco, MD
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText At western boundary of THST, 50 ft above mouth of stream, approximately 1,700 ft southwest of the Thomas Stone home, 1.55 mi south of Marshalls Corner and 1.5 mi northwest of Port Tobacco, MD. Stream samples collected at this site monitor water quality derived from the central area of the park where most development is located and includes the Visitor Center, two septic leach fields servicing park facilities, and an inholding consisting of a private residence.
HUCEightDigitCode 02070011
LatitudeMeasure 38.5267876000
LongitudeMeasure -77.0424755000
SourceMapScaleNumeric 24000
HorizontalCollectionMethodName Interpolation-Map
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 65
VerticalMeasure/MeasureUnitCode ft
VerticalCollectionMethodName Topographic Map Interpolation
VerticalCoordinateReferenceSystemDatumName NGVD29
CountryCode US
StateCode 24
CountyCode 017
ProviderName STORET