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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-PRSF_WQ_MTL8

Mountain Lake East Arm (11NPSWRD_WQX-PRSF_WQ_MTL8) site data in the Water Quality Portal

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

This pipe, unspecified source site, maintained by the National Park Service Water Resources Division (identifier 11NPSWRD_WQX), has the name "Mountain Lake East Arm" and has the identifier 11NPSWRD_WQX-PRSF_WQ_MTL8. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)18050002.

This site is located in San Francisco County County, California at 37.7888700000 degrees latitude and -122.4650500000 degrees longitude using the datum WGS84. 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-PRSF_WQ_MTL8" 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*
Inorganics, Major, Non-metals 2014 - 2018
Microbiological 2014 - 2018
Not Assigned 2014 - 2018
Nutrient 2014 - 2018
Physical 2014 - 2018
*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-PRSF_WQ_MTL8
MonitoringLocationName Mountain Lake East Arm
MonitoringLocationTypeName Pipe, Unspecified Source
MonitoringLocationDescriptionText Top of Mountain Lake East Arm, accessed from gate (just passed Arguello Gate, need G1 key for both) on West Pacific Ave., adjacent to golf course. Follow path ~150 paces to storm drain in grass on right, turn left toward East Arm, sample at black plastic pipe outfall.
HUCEightDigitCode 18050002
LatitudeMeasure 37.7888700000
LongitudeMeasure -122.4650500000
HorizontalCollectionMethodName GPS Code (Pseudo Range) Standard Position (SA Off)
HorizontalCoordinateReferenceSystemDatumName WGS84
CountryCode US
StateCode 06
CountyCode 075
ProviderName STORET