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.

Beta

Thank you for trying the new WQX3.0 profiles. This website is a beta version of our future user interface. Additional profiles and site functionality are coming, so please visit this page often to see new and improved data offerings. Please be aware that this beta product may experience performance issues.
We appreciate your feedback and suggestions as you try these new services. Please contact us at WQX@epa.gov to provide your input.

WQP Home >  Providers >  STORET >  21GUAM >  21GUAM-R-2540-23

ATANTANO RIVER BRIDGE (21GUAM-R-2540-23) 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 Guam Environmental Protection Agency (BEACH) (identifier 21GUAM), has the name "ATANTANO RIVER BRIDGE" and has the identifier 21GUAM-R-2540-23. 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 13.4227700000 degrees latitude and 144.6752700000 degrees longitude using the datum GUAM. 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 "21GUAM-R-2540-23" 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*
Microbiological 1974 - 1977
Nutrient 1974 - 1977
Physical 1974 - 1977
*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 21GUAM
OrganizationFormalName Guam Environmental Protection Agency (BEACH)
MonitoringLocationIdentifier 21GUAM-R-2540-23
MonitoringLocationName ATANTANO RIVER BRIDGE
MonitoringLocationTypeName River/Stream
HUCEightDigitCode 22010000
LatitudeMeasure 13.4227700000
LongitudeMeasure 144.6752700000
SourceMapScaleNumeric 24000
HorizontalCollectionMethodName Interpolation-Map
HorizontalCoordinateReferenceSystemDatumName GUAM
CountryCode US
StateCode 66
CountyCode 010
ProviderName STORET