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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 >  11NPSWRD_WQX >  11NPSWRD_WQX-WAPA_0920230331

TWAPA09_20230331_fw (11NPSWRD_WQX-WAPA_0920230331) 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 "TWAPA09_20230331_fw" and has the identifier 11NPSWRD_WQX-WAPA_0920230331. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)22010000.

This site is located in Guam County, Guam at 13.4733200000 degrees latitude and 144.7134400000 degrees longitude using the datum WGS84. No horizontal location accuracy metadata is available. This site is at an elevation of 34 m 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-WAPA_0920230331" 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, Phytoplankton 2023 - 2023
Information 2023 - 2023
Nutrient 2023 - 2023
Physical 2023 - 2023
Physical, Habitat 2023 - 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 11NPSWRD_WQX
OrganizationFormalName National Park Service Water Resources Division
MonitoringLocationIdentifier 11NPSWRD_WQX-WAPA_0920230331
MonitoringLocationName TWAPA09_20230331_fw
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText North of Asan River ~40m downstream of bridge. Filamentous algae. Seems like there is minimal or non existent flow. Site located on Asan Beach Park on left bank just upstream of the mouth in Asan Bay. Most of the base of the site is filamentous green algae and sand/silt.
HUCEightDigitCode 22010000
LatitudeMeasure 13.4733200000
LongitudeMeasure 144.7134400000
HorizontalCollectionMethodName GPS-Unspecified
HorizontalCoordinateReferenceSystemDatumName WGS84
VerticalMeasure/MeasureValue 34
VerticalMeasure/MeasureUnitCode m
VerticalCollectionMethodName Digital Elevation Model
VerticalCoordinateReferenceSystemDatumName SEALV
CountryCode US
StateCode 66
CountyCode 010
ProviderName STORET