{9F3F4B02-1836-4472-913B-4357D3FA3535} eng; USA utf8 dataset EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact 2025-02-13 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) EnviroAtlas - Durham, NC - Domestic Water Use per Day by U.S. Census Block Group 2016-08-11 publication U.S. EPA Office of Research & Development (ORD) - National Exposure Research Laboratory (NERL) Research Triangle Park NC publisher US Environmental Protection Agency (US EPA) originator As included in this EnviroAtlas dataset, the community domestic water use was calculated using locally available water use data per capita in gallons of water per day (GPD), distributed dasymetrically, and summarized by census block group. Domestic water use, as defined in this case, is intended to represent residential indoor and outdoor water use (e.g., cooking, hygiene, landscaping, pools, etc.) for primary residences (i.e., excluding second homes and tourism rentals). For the purposes of this metric, these publicly-supplied estimates are also considered representative of local self-supplied water use. Specific to Durham, NC, the Division of Water Resources (DWR), part of the North Carolina Department of Natural Resources (NCDENR), has made local water supply plans centrally available online. All local governments are required to provide public water service. Community water systems with 1,000+ service connections or 3,000+ residents are required to prepare a local water supply plan. These plans include residential, also known as domestic, water usage. To account for variations due to weather, a ten-year average was calculated for Durham, Hillsborough, and the Orange Water and Sewer Authority (OWASA), which supplies southeast Orange County, including Chapel Hill and Carrboro. The ten-year average included available data between 2000 and 2010. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets). Domestic water use per census block group is being provided as a water demand metric for water resource planners and general public interest. The overall goal of EnviroAtlas is to employ and develop the best available science to map indicators of ecosystem services production, demand, and drivers for the nation. completed EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact asNeeded Ecosystem Environment theme EPA GIS Keyword Thesaurus Census Block Groups Communities Demand for Ecosystem Services Drinking Water Ecology Ecosystem Ecosystem Services EnviroAtlas Environment Environmental Atlas Ground Water Surface Water Utilities Water theme EnviroAtlas North Carolina Durham, NC place None https://edg.epa.gov/EPA_Data_License.html otherRestrictions Use Constraints: None. Please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated. otherRestrictions Access Constraints: None. PUBLIC https://project-open-data.github.io/schema/#accessLevel Standard Technical Controls eng; USA environment -79.134618 -78.788325 35.844552 36.133857 9999-01-01 Initial local domestic daily use data and accompanying detail are available through North Carolina's Local Water Supply Plans, located at www.ncwater.org. The dasymetric data and study area boundary are available via the EnviroAtlas. The census blocks, block maps, block groups, and tracts are available via www.census.gov. true Entity and Attribute Information Entity and Attribute Overview: For more information about EnviroAtlas data, go to https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets. The attribute table contains two fields, the U.S. Census block group identification number and the associated summarized water use estimate in thousands of gallons per block group. A comprehensive list of metric creation steps is included in the Processing Steps. Entity and Attribute Detail Citation: https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas distributor https://enviroatlas.epa.gov/download/DNC_metrics_Apr2020_CSV_Shapes.zip download Download The URL providing direct access to the downloadable dataset. download https://enviroatlas.epa.gov/download/DNC_metrics_Apr2020_FGDB.zip ESRI:ArcGIS API The endpoint of a web service to access the dataset (REST endpoint, WMS GetCapabilities URL, or a SOAP WSDL endpoint). webMapService https://enviroatlas.epa.gov/arcgis/rest/services/Communities/Community_BGmetrics/MapServer information Documentation URL for accessing related documents such as data dictionary, technical information about a dataset, developer documentation, etc. information https://www.epa.gov/enviroatlas/enviroatlas-data information Home Page Alternative landing page used to redirect user to a contextual, Agency-hosted "homepage" for the Dataset or API information dataset Horizontal Positional Accuracy Report Data were collected using methods that have unknown accuracy (EPA National Geospatial Data Policy [NGDP] Accuracy Tier 10). For more information, please see EPA's NGDP at https://www.epa.gov/geospatial/epa-national-geospatial-data-policy Features represented have not been tested for completeness Features represented have not been tested for completeness Tests for integrity have not been performed. This lineage was generated by the FGDC CSDGM to 19139 transformation 1. Local domestic per capita data values were researched and collected. In the case of Durham, 2002 and 2006-2010 values were included, for an average rate of 62.19 gpd. For Hillsborough, 2002 and 2007-2010 values were included, for an average of 43.65 gpd. For OWASA, 2002 and 2006-2010 values were included, for an average rate of 53.45 gpd. 2012-02-03T00:00:00 2. These local domestic per capita values were then applied geospatially according to census boundaries with ESRI's ArcMap 10.1. 2012-02-10T00:00:00 2a. Without the availability of a service provider boundary area layer, census block maps were used as a substitute to delineate communities within the study area - Durham, Hillsborough, Carrboro, and Chapel Hill. The service provider GPDs were applied by block for Durham, Hillsborough, and OWASA (supplying Carrboro and Chapel Hill). 2012-02-10T00:00:00 2b. In the absence of further data, service provider GPD estimates were considered representative of self-provided/individual private wells. To account for remaining unassigned or Null GPD blocks, associated block groups and tracts were evaluated. 2012-02-10T00:00:00 2c. Hillsborough is a community located in the northwest portion of the Durham study area. None of the Hillsborough block groups overlapped with the other communities' block groups. No outer "islands" (gaps between Hillsborough and the Durham study area boundary) were created. Therefore, the Hillsborough value (43.65) was applied to all Null GPD blocks within the Hillsborough block groups. 2012-02-10T00:00:00 2d. Carrboro (west) and Chapel Hill (east) are adjacent communities located in the southwest portion of the Durham study area. Their block groups overlapped. However, because both communities are supplied by OWASA, their block group overlap was insignificant. Therefore, the OWASA value (53.45) was applied to all Null GPD blocks within these block groups. 2012-02-10T00:00:00 2e. In applying the OWASA value at the block group level, outer "islands" were created between Carrboro and the southwestern portion of the Durham study area. In order to eliminate these islands and apply the most applicable water data value, the OWASA value (53.45) was also applied to Carrboro's southwestern census tracts. 2012-02-10T00:00:00 2f. Block group overlap also existed between Chapel Hill (southwest) and Durham (northeast). The cumulative area associated with each community's blocks within each overlapping block group was reviewed. The water data value was assigned to Null GPD blocks according to the community with the greatest total block area within the block group. In this case, the Null GPD blocks in the two northeastern block groups were assigned the Durham value (62.19) and the Null GPD blocks in the two southern and one northwestern block groups were assigned the OWASA value (53.45). 2012-02-10T00:00:00 3. To distribute and weight the data according to population, the final GPD assignments were rasterized (30m cells, snapped to the dasymetric raster) and multiplied by dasymetric data using the Raster Calculator. 2016-07-01T00:00:00 4. The dasymetrically distributed values were then summarized by block group using Zonal Statistics as Table. The results were divided to thousands of gallons per day for display in the atlas. 2016-07-01T00:00:00 unknown 2029-02-13 This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2024-02-09T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact