Limited availability of new USGS data: starting approximately February 29, 2024, there will be a period when new USGS data will not be accessible on the Water Quality Portal. Data will still be collected but will not be publicly available. This limited availability is expected to last a few weeks.
Recent USGS data will be accessible again upon release of the new Data Profiles, which will be in the WQX 3.0 format. These profiles should be available in March, 2024.


Similk Bay (SWINOMISH-SIM1) site data in the Water Quality Portal

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

This ocean site, maintained by the Swinomish Indian Tribal Community (Tribal) (identifier SWINOMISH), has the name "Similk Bay" and has the identifier SWINOMISH-SIM1. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)17110019.

This site is located in Skagit County County, Washington at 48.4220516975 degrees latitude and -122.5586443396 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 "SWINOMISH-SIM1" 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*
Information 2015 - 2023
Microbiological 2012 - 2023
Physical 2011 - 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 SWINOMISH
OrganizationFormalName Swinomish Indian Tribal Community (Tribal)
MonitoringLocationIdentifier SWINOMISH-SIM1
MonitoringLocationName Similk Bay
MonitoringLocationTypeName Ocean
HUCEightDigitCode 17110019
LatitudeMeasure 48.4220516975
LongitudeMeasure -122.5586443396
HorizontalCollectionMethodName GPS-Unspecified
HorizontalCoordinateReferenceSystemDatumName WGS84
CountryCode US
StateCode 53
CountyCode 057
ProviderName STORET