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<p style='margin-left:0px;'><span style='background-color:#ffffff; color:#000000; font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif; font-size:medium;'><span style='font-variant-ligatures:none !important; margin:0px; padding:0px;'><strong>Community water system service areas</strong> describe the geographic area that receives drinking water from a given community water system. Knowing these boundaries help to connect water system data (such as, compliance status) with water system customers.</span></span><br /><span style='color:#000000;'> </span></p><div><span style='background-color:#ffffff; color:#000000; font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif; font-size:medium;'><span style='font-variant-ligatures:none; margin:0px; padding:0px;'>This dataset contains ~44,000 unique service areas across all 50 states. While not 100% comprehensive, these systems cover 99% of all public water system consumers. 56% of systems are sourced from state/utility databases. The remaining systems, those with no state supplied boundary, were modeled using machine learning techniques. This effort used state sourced service areas to train a model on dozens of explanatory variables including drinking water intakes in order to approximate service areas where none are publicly available.</span></span></div><div><br /><span style='color:#000000;'> </span></div><div><span style='background-color:#ffffff; color:#000000; font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif; font-size:medium;'><span style='font-variant-ligatures:none; margin:0px; padding:0px;'>This dataset used the 2025 Quarter 2 Safe Drinking Water Information System for establishing the universe of community water systems.</span></span></div><div><br /><span style='color:#000000;'> </span></div><div><span style='background-color:#ffffff; color:#000000; font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif; font-size:medium;'><span style='font-variant-ligatures:none; margin:0px; padding:0px;'>For detailed information on this dataset, visit our GitHub repository: </span></span><a target='_blank' href='https://github.com/USEPA/ORD_SAB_Model' rel='nofollow ugc noopener noreferrer'><span style='background-color:#ffffff; color:#000000; font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif; font-size:medium;'><span style='font-variant-ligatures:none;'>https://github.com/USEPA/ORD_SAB_Model</span></span></a></div><div> </div><div><span style='color:#000000;'>The system sourced boundaries are derived from approx. 1000 unique sources. Download the ‘Data Sources.xlsx’ spreadsheet to view these sources: https://epa.maps.arcgis.com/home/item.html?id=ed844af1c459429aa4a7c81299e6f41a.</span><br /><span style='color:#000000;'> </span></div><div><span style='color:#000000; font-family:Calibri, sans-serif; font-size:medium;'>***Version 1.3 was updated on 04/16/25. This update replaced Minnesota's modeled boundaries with authoritative boundaries derived from MN's lead service line inventory***</span></div><div> </div><div><span style='color:#000000; font-family:Calibri, sans-serif; font-size:medium;'>***Version 2.0 was updated on 09/19/25. This update substancially increased the number system sourced service areas. Many of these came from lead service line inventories and utility water main data, for example. With this update, 85% of the population on public water is represented by system sourced service areas.***</span></div><div> </div><div><span style='color:#000000; font-family:Calibri, sans-serif; font-size:medium;'>***Version 2.01 was updated on 09/29/25. There were minor edits to about 24 systems with duplicate PWSIDs***</span></div><div> </div><div><span style='color:#000000; font-family:Calibri, sans-serif; font-size:medium;'>***Version 2.1 was updated on 11/18/2025. 996 system sourced service areas were added. In particular, many system sourced utility boundaries were added for Alaska, Colorado, Florida, Mississippi, and Montana.***</span></div><div> </div><div><span style='background-color:rgb(255,255,255); color:rgb(0,0,0); font-family:Calibri, sans-serif; font-size:medium;'><span style='display:inline !important; float:none; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>***Version 3.0 was updated on 3/17/2026. This update showcases the release of transient and non-transient non-community water system service areas.***</span></span></div>
Water System BoundariesDrinking WaterWaterCommunity Water SystemService Area BoundariesPublic Water SystemsWater UtilityWater MainsPublic Water SystemSafe Drinking Water ActSDWISEPAEnvironmental Protection AgencyWater UtilitiesWater DistributionService AreasService LinesLead Service Line InventoryLead and Copper RuleLCR
This dataset contains US public water system service areas for over 44,000 community water systems and approximately 80,000 transient and non-transient non-community water systems
US EPA
<p><span style='color: #000000;'>MIT License </span></p>
<p><span style='color: #000000;'>Copyright (c) 2025 US EPA </span></p>
<p><span style='color: #000000;'>Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. </span></p>
<p><span style='color: #000000;'>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span></p>
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