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-LAVO_L1_LOTWINL

Lower Twin Lake (11NPSWRD_WQX-LAVO_L1_LOTWINL) site data in the Water Quality Portal

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

This lake site, maintained by the National Park Service Water Resources Division (identifier 11NPSWRD_WQX), has the name "Lower Twin Lake" and has the identifier 11NPSWRD_WQX-LAVO_L1_LOTWINL. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)18020003.

This site is located in Shasta County County, California at 40.5065679000 degrees latitude and -121.3616053000 degrees longitude using the datum NAD83. 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-LAVO_L1_LOTWINL" 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 2005 - 2005
Physical 2005 - 2005
*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-LAVO_L1_LOTWINL
MonitoringLocationName Lower Twin Lake
MonitoringLocationTypeName Lake
MonitoringLocationDescriptionText Station part of Level I Baseline Water Quality Report for Lassen Volcanic National Park. Latitude and longitude coordinates are approximated based on the waterbody name in the report and some inaccurate UTM coordinates provided for some stations in the report.
HUCEightDigitCode 18020003
LatitudeMeasure 40.5065679000
LongitudeMeasure -121.3616053000
SourceMapScaleNumeric 24000
HorizontalCollectionMethodName Interpolation-Digital Map Source
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 06
CountyCode 089
ProviderName STORET