Skip to main content
U.S. flag

An official website of the United States government

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 legacy user interface will continue to function for several weeks. However, this user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  STORET >  21MSWQ_WQX >  21MSWQ_WQX-MS17-319

ST LOUIS BAY (21MSWQ_WQX-MS17-319) site data in the Water Quality Portal

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

This estuary site, maintained by the MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITY (identifier 21MSWQ_WQX), has the name "ST LOUIS BAY" and has the identifier 21MSWQ_WQX-MS17-319. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)03170009.

This site is located in Harrison County County, Mississippi at 30.3118092400 degrees latitude and -89.3026932400 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 "21MSWQ_WQX-MS17-319" 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 February, 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*
Biological, Algae, Phytoplankton, Photosynthetic Pigments 2017 - 2017
Information 2017 - 2017
Inorganics, Minor, Metals 2017 - 2017
Inorganics, Minor, Non-metals 2017 - 2017
Nutrient 2017 - 2017
Organics, Other 2017 - 2017
Organics, PCBs 2017 - 2017
Organics, Pesticide 2017 - 2017
Physical 2017 - 2017
*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 21MSWQ_WQX
OrganizationFormalName MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITY
MonitoringLocationIdentifier 21MSWQ_WQX-MS17-319
MonitoringLocationName ST LOUIS BAY
MonitoringLocationTypeName Estuary
MonitoringLocationDescriptionText COUNTY: HARRISON ECOREGION: 75K
HUCEightDigitCode 03170009
LatitudeMeasure 30.3118092400
LongitudeMeasure -89.3026932400
SourceMapScaleNumeric 24000
HorizontalCollectionMethodName Interpolation-Map
HorizontalCoordinateReferenceSystemDatumName WGS84
CountryCode US
StateCode 28
CountyCode 047
ProviderName STORET