Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="font-weight:bold;"><SPAN>Display and summarize monitoring data collected for and identified within the 2020 305(b)/303(d) Water Quality Assessment Integrated Report. </SPAN></SPAN><SPAN><SPAN>This dataset was created from DEQ’s Comprehensive Environmental Data System (CEDS), various state, federal or local organizations, as well as many citizen monitoring groups across the commonwealth. The station data is used by regional assessment staff to assist in determining the status of the waterbody as compared to the applicable Water Quality Standards criteria set for each water.</SPAN></SPAN></P><P /><P><SPAN><SPAN>The data represents a summary of all monitoring stations used to assess the waters represented in the IR for the 2020 assessment cycle. All points correspond to the relative position of the monitoring site as provided by DEQ staff or external data contributors. Attributes assigned to each record are aggregated over the 6 year data window for the individual station ID.</SPAN></SPAN></P><P><SPAN /><SPAN /></P><P><SPAN><SPAN>While not directly reviewed by EPA, this data constitutes the final version of this dataset to supplement the assessment hydrology layers. Attributes assigned to each water segment are based on water column, sediment, fish tissue or benthic macroinvertebrate samples collected within the given assessment data window. Data validations are performed to verify attribute and spatial accuracy, however errors may still occur.</SPAN></SPAN></P><P /><P><SPAN><SPAN>Stations monitored prior to the 2020 IR data window may be included for clarification of assessment unit ID status but have no data within the station table’s parameter columns. See the Comments field for further information in those instances.</SPAN></SPAN></P><P /><P><SPAN><SPAN>Please direct any questions about attribute accuracy to the Data Contact.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Copyright Text: Virginia Department of Environmental Quality, Office of Ecology, Water Monitoring & Assessment Program
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="font-weight:bold;"><SPAN>Display and define all surface waters identified within the 2020 305(b)/303(d) Water Quality Assessment Integrated Report. </SPAN></SPAN><SPAN><SPAN>The Assessment Unit (AU) dataset was created from United States Geological Survey (USGS) National Hydrography Dataset (NHD) high-resolution 1:24,000 data extracted in September 2012. The NHD product was used by DEQ regional assessment staff to assign previously established assessment unit IDs based on predetermined up- and downstream extents and applicable Water Quality Standards. Some erroneous waters were removed and a few waters were corrected for spatial accuracy using Virginia Base Mapping Program aerial photography from Virginia Geographic Information Network (VGIN), and recent NHD data where available.</SPAN></SPAN></P><P /><P><SPAN><SPAN>There are 3 feature classes within the geodatabase:</SPAN></SPAN></P><P><SPAN><SPAN>va_aus_estuarine – estuarine waters within the commonwealth, including the Chesapeake Bay and tidal tributaries to the Bay</SPAN></SPAN></P><P><SPAN><SPAN>va_aus_reservoir – lakes and reservoirs with Water Quality Standards or those monitored within the commonwealth; see appendix 7 of the IR for a complete list</SPAN></SPAN></P><P><SPAN><SPAN>va_aus_riverine – free flowing surface waters within the commonwealth </SPAN></SPAN></P><P /><P><SPAN><SPAN>This data constitutes the United States Environmental Protection Agency (EPA) approved version of the assessment unit hydrology for Virginia. Attributes assigned to each water segment are based on details associated with the ID305B (assessment unit ID) from the statewide water quality assessment database (ADB) (ADB is deprecated as of the 2020 cycle). Data validations are performed on the data prior to linking attributes to the GIS data, however errors may still occur.</SPAN></SPAN></P><P /><P><SPAN><SPAN>Additionally, a summary dataset of water quality monitoring stations (va_20ir_wqms) which includes DEQ and non-DEQ data is generated to supplement this AU data.</SPAN></SPAN></P><P /><P><SPAN><SPAN>Please direct any questions about attribute accuracy to the Data Contact.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Copyright Text: Virginia Department of Environmental Quality, Office of Ecology, Water Monitoring & Assessment Program
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="font-weight:bold;"><SPAN>Display and define all surface waters identified within the 2020 305(b)/303(d) Water Quality Assessment Integrated Report. </SPAN></SPAN><SPAN><SPAN>The Assessment Unit (AU) dataset was created from United States Geological Survey (USGS) National Hydrography Dataset (NHD) high-resolution 1:24,000 data extracted in September 2012. The NHD product was used by DEQ regional assessment staff to assign previously established assessment unit IDs based on predetermined up- and downstream extents and applicable Water Quality Standards. Some erroneous waters were removed and a few waters were corrected for spatial accuracy using Virginia Base Mapping Program aerial photography from Virginia Geographic Information Network (VGIN), and recent NHD data where available.</SPAN></SPAN></P><P /><P><SPAN><SPAN>There are 3 feature classes within the geodatabase:</SPAN></SPAN></P><P><SPAN><SPAN>va_aus_estuarine – estuarine waters within the commonwealth, including the Chesapeake Bay and tidal tributaries to the Bay</SPAN></SPAN></P><P><SPAN><SPAN>va_aus_reservoir – lakes and reservoirs with Water Quality Standards or those monitored within the commonwealth; see appendix 7 of the IR for a complete list</SPAN></SPAN></P><P><SPAN><SPAN>va_aus_riverine – free flowing surface waters within the commonwealth </SPAN></SPAN></P><P /><P><SPAN><SPAN>This data constitutes the United States Environmental Protection Agency (EPA) approved version of the assessment unit hydrology for Virginia. Attributes assigned to each water segment are based on details associated with the ID305B (assessment unit ID) from the statewide water quality assessment database (ADB) (ADB is deprecated as of the 2020 cycle). Data validations are performed on the data prior to linking attributes to the GIS data, however errors may still occur.</SPAN></SPAN></P><P /><P><SPAN><SPAN>Additionally, a summary dataset of water quality monitoring stations (va_20ir_wqms) which includes DEQ and non-DEQ data is generated to supplement this AU data.</SPAN></SPAN></P><P /><P><SPAN><SPAN>Please direct any questions about attribute accuracy to the Data Contact.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Copyright Text: Virginia Department of Environmental Quality, Office of Ecology, Water Monitoring & Assessment Program
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="font-weight:bold;"><SPAN>Display and define all surface waters identified within the 2020 305(b)/303(d) Water Quality Assessment Integrated Report. </SPAN></SPAN><SPAN><SPAN>The Assessment Unit (AU) dataset was created from United States Geological Survey (USGS) National Hydrography Dataset (NHD) high-resolution 1:24,000 data extracted in September 2012. The NHD product was used by DEQ regional assessment staff to assign previously established assessment unit IDs based on predetermined up- and downstream extents and applicable Water Quality Standards. Some erroneous waters were removed and a few waters were corrected for spatial accuracy using Virginia Base Mapping Program aerial photography from Virginia Geographic Information Network (VGIN), and recent NHD data where available.</SPAN></SPAN></P><P /><P><SPAN><SPAN>There are 3 feature classes within the geodatabase:</SPAN></SPAN></P><P><SPAN><SPAN>va_aus_estuarine – estuarine waters within the commonwealth, including the Chesapeake Bay and tidal tributaries to the Bay</SPAN></SPAN></P><P><SPAN><SPAN>va_aus_reservoir – lakes and reservoirs with Water Quality Standards or those monitored within the commonwealth; see appendix 7 of the IR for a complete list</SPAN></SPAN></P><P><SPAN><SPAN>va_aus_riverine – free flowing surface waters within the commonwealth </SPAN></SPAN></P><P /><P><SPAN><SPAN>This data constitutes the United States Environmental Protection Agency (EPA) approved version of the assessment unit hydrology for Virginia. Attributes assigned to each water segment are based on details associated with the ID305B (assessment unit ID) from the statewide water quality assessment database (ADB) (ADB is deprecated as of the 2020 cycle). Data validations are performed on the data prior to linking attributes to the GIS data, however errors may still occur.</SPAN></SPAN></P><P /><P><SPAN><SPAN>Additionally, a summary dataset of water quality monitoring stations (va_20ir_wqms) which includes DEQ and non-DEQ data is generated to supplement this AU data.</SPAN></SPAN></P><P /><P><SPAN><SPAN>Please direct any questions about attribute accuracy to the Data Contact.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Copyright Text: Virginia Department of Environmental Quality, Office of Ecology, Water Monitoring & Assessment Program
Description: <DIV STYLE="text-align:Left;"><DIV><P><SPAN>Extracted from the polyline layer of freshwater riverine features within Virginia included in the final 2020 305(b)/303(d) Integrated Report, downloaded from the DEQ Open Data Portal (https://geohub-vadeq.hub.arcgis.com/pages/c1ad79b7b58844f9b468f19c3907cac2)</SPAN></P></DIV></DIV>
Copyright Text: Virginia Department of Environmental Quality, Office of Ecology, Water Monitoring & Assessment Program
Description: <DIV STYLE="text-align:Left;"><DIV><P><SPAN>Extracted from the polygon layer of lakes and reservoirs within Virginia included in the final 2020 305(b)/303(d) Integrated Report, downloaded from the DEQ Open Data Portal (https://geohub-vadeq.hub.arcgis.com/pages/c1ad79b7b58844f9b468f19c3907cac2)</SPAN></P></DIV></DIV>
Copyright Text: Virginia Department of Environmental Quality, Office of Ecology, Water Monitoring & Assessment Program