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-VAFO_CHS_GARRW

W OF WHERE GARRETT MILL RD CROSSES RIDLEY CREEK (11NPSWRD_WQX-VAFO_CHS_GARRW) 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 "W OF WHERE GARRETT MILL RD CROSSES RIDLEY CREEK" and has the identifier 11NPSWRD_WQX-VAFO_CHS_GARRW. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)02040202.

This site is located in Chester County County, Pennsylvania at 39.9724722000 degrees latitude and -75.4964722000 degrees longitude using the datum NAD27. 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 "11NPSWRD_WQX-VAFO_CHS_GARRW" 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*
Information 1996 - 1996
Microbiological 1996 - 1996
Nutrient 1996 - 1996
Physical 1996 - 1996
Sediment 1996 - 1996
*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-VAFO_CHS_GARRW
MonitoringLocationName W OF WHERE GARRETT MILL RD CROSSES RIDLEY CREEK
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText THE STATION IS LOCATED ON THE MEDIA PENNSYLVANIA 7.5 MINUTE SERIES TOPOGRAPHIC QUADRANGLE. THE STATION IS LOCATED OUTSIDE OF VALLEY FORGE NATIONAL HISTORICAL PARK. THE SAMPLE SITE IS WEST OF WHERE GARRETT MILL RD CROSSES THE MAIN STEM OF RIDLEY CREEK IN WILLISTOWN TOWNSHIP. DATA ARE FROM A SERIES OF RIDLEY CREEK REPORTS PREPARED BY THE ADVANCED BIOLOGY STUDENTS OF CONESTOGA HIGH SCHOOL; TREDYFFRINEASTTOWN SCHOOL DISTRICT. STUDENTS USED TO BE UNDER THE DIRECTION OF DR. RALPH HEISTER BUT HAVE BEEN UNDER THE DIRECTION OF NORMAN MARRINER SINCE 1991. SAMPLING WAS DONE BY THE STUDENTS. BACTERIOLOGICAL SAMPLES WERE RUN BY THE CHESTER COUNTY HEALTH DEPARTMENT. FOR INFORMATION ABOUT THE PARK CONTACT RESOURCE MANAGEMENT; VALLEY FORGE NATIONAL HISTORICAL PARK; P.O. BOX 953; VALLEY FORGE PA 194820953 TEL(610)7831000. DATA WERE PROCESSED AND UPLOADED TO STORET BY ARIA BRISSETTE; NATIONAL PARK SERVICE WATER RESOURCES DIVISION; 1201 OAK RIDGE DRIVE SUITE 250; FORT COLLINS CO 805255596 TEL(970)2253516.*** Legacy STORET Station Type: /TYPA/AMBNT/STREAM
HUCEightDigitCode 02040202
LatitudeMeasure 39.9724722000
LongitudeMeasure -75.4964722000
SourceMapScaleNumeric 0
HorizontalCollectionMethodName Unknown
HorizontalCoordinateReferenceSystemDatumName NAD27
CountryCode US
StateCode 42
CountyCode 029
ProviderName STORET