Brakebill, J.W. LaMotte, A.L. 2019 tabular digital data https://doi.org/10.5066/F7765D7V This metadata record describes estimates of public supply water withdrawals for 2010, weighted by the population served in 2013. Data were compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data suite by the unique identifier COMID. Reach catchment information characterizes data at the local scale. Reach catchments accumulated upstream through the river network characterizes cumulative upstream conditions. Network-accumulated values are computed using two methods, 1) divergence-routed and 2) total cumulative drainage area. Both approaches use a modified routing database to navigate the NHDPlus reach network to aggregate (accumulate) the metrics derived from the reach catchment scale. (Schwarz and Wieczorek, 2018). This dataset was created by the U.S. Geological Survey (USGS) National Water-Quality Assessment (NAWQA) Project in support of USGS SPARROW modeling (SPAtially Referenced Regressions On Watershed attributes). The dataset also can be useful for other applications such as national or regional watershed characterizations and modeling. Population served is reported by permit and not by an individual site, so the number of people served were allocated to each site equally. For example, if 3,000 people were served by 15 sites, then each site would be serving 200 people in these data. The values were then summed by catchment. Reference of original population served Price, C.V., and Maupin, M.A., 2014, Documentation for the U.S. Geological Survey Public-Supply Database (PSDB)-A database of permitted public-supply wells, surface-water intakes, and systems in the United States: U.S. Geological Survey Open-File Report 2014-1212, 22 p., https://dx.doi.org/10.3133/ofr20141212 2010 ground condition Complete None planned World -125.7715 -65.4346 49.6676 24.0465 USGS Metadata Identifier USGS:5d77f42de4b0c4f70d020bc2 None Water use Withdrawal Groundwater withdrawal Surface water withdrawal None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. John W Brakebill U.S. Geological Survey, Northeast Region Supervisory Geographer mailing address

5522 Research Park Drive

Catonsville MD 21228 United States 443-498-5557 443-498-5510 jwbrakeb@usgs.gov Population served agreed with input dataset. Data values fall within expected range, no anomalies observed 2010 estimates, "snapshot". Wieczorek, M.E. Jackson, S.E. Schwarz, G.E 2019 tabular digital data https://doi.org/10.5066/F7765D7V Digital and/or Hardcopy 2013 ground condition Estimated population served by public water, 2013 population served, 2013 Maupin, M.A. Kenny, J.F. Hutson, S.S. Lovelace, J.K. Barber, N.L. Linsey, K.S. 2014 tabular digital data https://dx.doi.org/10.3133/cir1405 Digital and/or Hardcopy 2010 ground condition County estimated water use County estimates of water withdrawals Schwarz, G.E. Wieczorek, M.E. 2018 tabular digital data https://doi.org/10.5066/P9PA63SM Digital and/or Hardcopy 2019 ground condition ENHDPlusv2_us Routing procedures 2013 population served by surface water and groundwater categorized by NHDPlus V2 catchment, facility ID, and FIPS were used in conjunction with 2010 county public supply withdrawal data to compute Public Supply Withdrawal values (MGD) by surface and groundwater (LaMotte, 2019 in Wieczorek and others, 2018) Population served data from SDWIS (EPA and USGS) based on facility point data. Facility points were overlaid on counties and catchments. Population served values are by facility ID, not by individual point location. When multiple points with the same Facility ID (FAID) were encountered, the population served (which represents the population the facility serves, reported by the water supplier) was split equally among the points with the same facility ID. Population served by county were summed. Population served by COMID and County were summed. A ratio of population served by COMID to total county population served was computed. This ratio was multiplied by the county public supply withdrawal data the point resides in, then summed by COMID. 20171020 An accumulation algorithm was performed on the assigned variables. See the metadata for "Database of Modified Routing for NHDPlus Version 2.1 Flowlines: ENHDPlusV2_US" by Schwarz and Wieczorek 2018 in Source_Information for more details. Exported results into a comma separated text file format. 2019 pop_serve_with_1.csv Comma Separated Value (CSV) file containing data. Producer Defined comid Unique identifier of each NHDPlus v2.1 flowline Producer Defined gw_popserv Population served by groundwater withdrawal Producer Defined Blank Field No data values Producer defined 0 1,400,000 population GWWithdraw Groundwater withdrawal weighted by population served for Public Supply Producer Defined Blank field No data values Producer defined 0.0 182.3802 Million gallons per day sw_popserv Population served by surface water withdrawal Producer Defined Blank Field No data values Producer defined 0.0 1357292 population SWWithdraw Surface water withdrawal weighted by population served for Public Supply Producer Defined Bland Field No data values Producer defined 0.0 417.35 Million gallons per day ACC_GWPOP Accumulated groundwater population served for all upstream catchments based on divergence routing Producer Defined 0 39412892.579 population ACC_GW_WIth Accumulated groundwater withdrawals weighted by population served for all upstream catchments based on divergence routing Producer Defined Blank field No data values Producer defined 0 3980.0757569 Million gallons per day ACC_SWPOP Accumulated surface water population served for all upstream catchments based on divergence routing Producer Defined Blank field No data values Producer defined 0.0 32724146.185 population ACC_SW_With Accumulated surface water withdrawals weighted by population served for all upstream catchments based on divergence routing Producer Defined Bland fields No data values Producer defined 0.0 5457.0874116 Million gallons per day totACC_GWPOP Accumulated groundwater population served for all upstream catchments based on total upstream routing Producer Defined Blank field No data values Producer defined 0 39523303.42 population totACC_GW_WIth Accumulated groundwater withdrawals weighted by population served for all upstream catchments based on total upstream routing Producer Defined Blank field No data values Producer defined 0 3995.8231813 Million gallons per day totACC_SWPOP Accumulated surface water population served for all upstream catchments based on total upstream routing Producer Defined Blank field No data values Producer defined 0.0 32725446.249 population totACC_SW_With Accumulated groundwater withdrawals weighted by population served for all upstream catchments based on total upstream routing Producer Defined Bland field No data values Producer defined 0.0 5457.0878305 Million gallons per day GS ScienceBase U.S. Geological Survey mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/F7765D7V None 20260326 John W Brakebill U.S. Geological Survey, Northeast Region Supervisory Geographer mailing address

5522 Research Park Drive

Catonsville MD 21228 United States 443-498-5557 443-498-5510 jwbrakeb@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata FGDC-STD-001.1-1999