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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 >  SNOCODCNR_SWM >  SNOCODCNR_SWM-LRTB

Silvana Terrace Rd. Trib - from southern flow entering catch basin (Formerly Larson Rd. Trib) (SNOCODCNR_SWM-LRTB) site data in the Water Quality Portal

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

This storm sewer site, maintained by the Snohomish County Surface Water Management (identifier SNOCODCNR_SWM), has the name "Silvana Terrace Rd. Trib - from southern flow entering catch basin (Formerly Larson Rd. Trib)" and has the identifier SNOCODCNR_SWM-LRTB. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)17110008.

This site is located in Snohomish County County, Washington at 48.2003200000 degrees latitude and -122.2757000000 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 "SNOCODCNR_SWM-LRTB" 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 2025 - 2025
*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 SNOCODCNR_SWM
OrganizationFormalName Snohomish County Surface Water Management
MonitoringLocationIdentifier SNOCODCNR_SWM-LRTB
MonitoringLocationName Silvana Terrace Rd. Trib - from southern flow entering catch basin (Formerly Larson Rd. Trib)
MonitoringLocationTypeName Storm Sewer
HUCEightDigitCode 17110008
LatitudeMeasure 48.2003200000
LongitudeMeasure -122.2757000000
SourceMapScaleNumeric 100
HorizontalCollectionMethodName Interpolation-Digital Map Source
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 53
CountyCode 061
ProviderName STORET