Reservoir (2024 Final WQA IR Assessment)

<p>Show all lakes and reservoirs identified in the 2024 Virginia 305(b)/303(d) Water Quality Assessment Integrated Report.<br /><br />Click <a target='_blank' href='https://gisdata.deq.virginia.gov/mapper_ext/DataFactSheets/Water_Watersheds/2024_IR_AU_FeatureClasses.pdf' rel='nofollow ugc noopener noreferrer'><strong>Here </strong></a>to view Data Fact Sheet.</p><p>Provide assessment summary details for all lacustrine waters identified within the 2024 305(b)/303(d) Water Quality Assessment Integrated Report. 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 updated using Virginia Base Mapping Program aerial photography from Virginia Geographic Information Network (VGIN), and recent NHD data where available.</p>