Mississippi Water Resources Data Compendium Search Layers

 

MDEQ Office of Pollution Control Data

Point Source Permits: Surface water pollution makes water bodies unsafe for drinking, fishing, swimming, and other activities. Pursuant to the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) program controls surface water pollution by regulating point sources that discharge pollutants into waters of the United States. Point sources are discrete conveyances such as pipes or man-made ditches that discharge effluent into surface waters in Mississippi. Individual homes that are either connected to a municipal system, or use a septic system, or do not have a surface discharge are not required to obtain an NPDES permit.

Stormwater Permits: Stormwater Permits are Point Source Permits restricted to only Stormwater runoff.

Section 319 BMP Sites: The Best Management Practice (BMP) data layer is a compilation of BMP locations funded by Section 319 of the Clean Water Act.  BMPs generally describe acceptable practices implemented to protect water quality from Nonpoint Source (NPS) pollution.  Data in this layer range from 1999 to present and are updated periodically as new data become available. For more information regarding BMPs in Mississippi download the following manual. 

enSPIRE Sites: The enSPIRE (environmental Surface water Portal for Information Repository and Exchange) data system is designed for MDEQ to manage surface water quality data collected and maintained by MDEQ pursuant to the Clean Water Act ambient monitoring program for planning and assessment purposes ( i.e. ambient fixed station bridge network, ambient fecal network, MBISQ stations etc).  enSPIRE WQ sites layer contains sites for monitoring and assessment data and information for MDEQ personnel, the USEPA, planners, developers, stakeholders and the public.

MDEQ Office of Land and Water Data

Surface Water Permits: The Office of Land and Water Resource's Division of Permitting and Monitoring is responsible for the issuance and renewal of permits related to the withdrawal of groundwater and diversion or impoundment of surface water. This dataset is strictly showing Surface Water Permits. The permits are color coded by expiration date. Green are active, Yellow have been expired less than a year, and Red have been expired for over a year.

Groundwater Permits: The Office of Land and Water Resource's Division of Permitting and Monitoring is responsible for the issuance and renewal of permits related to the withdrawal of groundwater and diversion or impoundment of surface water. This dataset is strictly showing Groundwater Permits. The permits are color coded by expiration date. Green are active, Yellow have been expired less than a year, and Red have been expired for over a year.

USACE Data

Yazoo Basin Sites: The USACE Vicksburg District periodically collects environmental samples to support authorized projects within its boundaries.  Currently all authorized projects in Mississippi are within the Yazoo Basin.  The "USACE Yazoo Basin Sites" data layer locates water quality sampling stations where the Vicksburg District has collected more than one surface water sample within the past 10 years. Sites with one time discrete samples are not identified in this layer. The District has collected monthly surface water grab samples at 6 stations in the Steele Bayou Basin and 3 stations along the lower Big Sunflower River since 2005.  In 2009, the District collected samples from Cassidy Bayou and Opossum Bayou.  Other stations located in the data layer are a part of the Delta Fixed Station Monitoring Network, which is collaboration between the USGS, the MDEQ and the Vicksburg District.

USGS Data

Real-time Water Quality Sites: At selected surface-water and groundwater sites, the USGS maintains instruments that continuously record physical and chemical characteristics of the water including pH, specific conductance, temperature, dissolved oxygen, and turbidity. Supporting data such as air temperature and barometric pressure are also available at some sites. At sites where this information is transmitted automatically, data are available from the real-time data system. Real-time data are time-series (recorded at fixed intervals) data from automated equipment and represent the most current hydrologic conditions. Measurements are commonly recorded at 15- to 60-minute intervals and transmitted to the USGS real-time database every 1-4 hours. Real-time data are available online for 120 days.

Real-time Stream Flow: At selected surface-water sites, the USGS maintains instruments that continuously record water levels. Other data such as precipitation are also available at some sites. At sites where this information is transmitted automatically, data are available from the real-time data system. Real-time data are time-series (recorded at fixed intervals) data from automated equipment and represent the most current hydrologic conditions. Measurements are commonly recorded at 15- to 60-minute intervals and transmitted to the USGS real-time database every 1-4 hours. Real-time data are available online for 120 days.

Surface Water Quality Sites After 1980: The USGS collects and analyzes chemical, physical, and biological properties of water, sediment and tissue samples from across the Nation. The NWISWeb discrete sample data base is a compilation of over 4.4 million historical water quality analyses in the USGS district data bases through September 2005. The discrete sample data is a large and complex set of data that has been collected by a variety of projects ranging from national programs to studies in small watersheds. Data from field and/or laboratory analyses of water samples, biological tissue, stream sediments, or other environmental samples is included. Data include approved, quality-assured data that may be published, and more recent provisional data, whose accuracy has not been verified. For convenience, the datasets have been divided into those collected after 1980.

Surface Water Quality Sites Before 1980: The USGS collects and analyzes chemical, physical, and biological properties of water, sediment and tissue samples from across the Nation. The NWISWeb discrete sample data base is a compilation of over 4.4 million historical water quality analyses in the USGS district data bases through September 2005. The discrete sample data is a large and complex set of data that has been collected by a variety of projects ranging from national programs to studies in small watersheds. Data from field and/or laboratory analyses of water samples, biological tissue, stream sediments, or other environmental samples is included. Data include approved, quality-assured data that may be published, and more recent provisional data, whose accuracy has not been verified. For convenience, the datasets have been divided into those collected prior to 1980.

Groundwater Quality: At selected groundwater sites, the USGS maintains instruments that continuously record physical and chemical characteristics of the water including pH, specific conductance, temperature, dissolved oxygen, and percent dissolved-oxygen saturation. Supporting data such as air temperature and barometric pressure are also available at some sites. Also, data from field and/or laboratory analyses of discrete water samples are included. Data include approved, quality-assured data that may be published, and more recent provisional data, whose accuracy has not been verified.