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WQP Home >  Providers >  STORET >  OREGONDEQ >  OREGONDEQ-PWS4100724:CH-A

City of St. Helen's (Columbia River) (OREGONDEQ-PWS4100724:CH-A) site data in the Water Quality Portal

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

This facility public water supply (pws) site, maintained by the State of Oregon Dept. of Environmental Quality (identifier OREGONDEQ), has the name "City of St. Helen's (Columbia River)" and has the identifier OREGONDEQ-PWS4100724:CH-A. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)17080003.

This site is located in Columbia County County, Oregon at 45.8716876000 degrees latitude and -122.8138748200 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 "OREGONDEQ-PWS4100724:CH-A" 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.

Leaflet USGS The National Map: National Boundaries Dataset, 3DEP Elevation Program, Geographic Names Information System, National Hydrography Dataset, National Land Cover Database, National Structures Dataset, and National Transportation Dataset; USGS Global Ecosystems; U.S. Census Bureau TIGER/Line data; USFS Road data; Natural Earth Data; U.S. Department of State HIU; NOAA National Centers for Environmental Information. Data refreshed July 22, 2025.

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*
Cyanotoxins, Phytotoxins 2023 - 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 OREGONDEQ
OrganizationFormalName State of Oregon Dept. of Environmental Quality
MonitoringLocationIdentifier OREGONDEQ-PWS4100724:CH-A
MonitoringLocationName City of St. Helen's (Columbia River)
MonitoringLocationTypeName Facility Public Water Supply (PWS)
HUCEightDigitCode 17080003
LatitudeMeasure 45.8716876000
LongitudeMeasure -122.8138748200
HorizontalCollectionMethodName Interpolation-Digital Map Source
HorizontalCoordinateReferenceSystemDatumName WGS84
CountryCode US
StateCode 41
CountyCode 009
ProviderName STORET