Community Water Service Area Boundaries

Community water system service areas 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. 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. This dataset used the 2025 Quarter 2 Safe Drinking Water Information System for establishing the universe of community water systems. For detailed information on this dataset, visit our GitHub repository: https://github.com/USEPA/ORD_SAB_Model 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. ***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*** ***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.*** ***Version 2.01 was updated on 09/29/25. There were minor edits to about 24 systems with duplicate PWSIDs*** ***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.*** ***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.***社区供水系统服务范围指的是由特定社区供水系统提供饮用水服务的地理区域。明确此类服务边界，可将供水系统数据（如合规状态）与供水系统用户进行关联。本数据集涵盖全美50个州共计约4.4万个独立服务范围。尽管未实现100%全覆盖，但该数据集覆盖了全美99%的公共供水系统用户。其中56%的服务范围数据源自各州/公用事业单位数据库。剩余未获取州级提供边界的服务范围，则通过机器学习技术建模生成。本次建模以州级提供的服务范围数据为训练基础，依托包括饮用水取水点在内的数十项解释变量，对无公开可用边界的服务范围进行近似推演。本数据集以2025年第二季度的《安全饮用水信息系统（Safe Drinking Water Information System）》为基准，确定社区供水系统的全域范围。如需获取本数据集的详细信息，请访问我们的GitHub仓库：https://github.com/USEPA/ORD_SAB_Model。本次采集的官方服务边界数据，源自约1000个独立数据源。可下载‘Data Sources.xlsx’电子表格查看完整数据源列表：https://epa.maps.arcgis.com/home/item.html?id=ed844af1c459429aa4a7c81299e6f41a。***版本1.3于2025年4月16日更新：本次更新将明尼苏达州的建模生成服务范围，替换为源自该州铅服务管线清查结果的权威边界数据。*** ***版本2.0于2025年9月19日更新：本次更新大幅增加了官方来源的服务范围数量，其中多数数据源自铅服务管线清查结果与公用事业单位供水干管数据等。更新后，85%的公共供水人口覆盖量可通过官方来源服务范围实现。*** ***版本2.01于2025年9月29日更新：针对约24个存在重复公共供水系统标识符（Public Water System Identifier，PWSID）的条目进行了小幅修正。*** ***版本2.1于2025年11月18日更新：新增了996个官方来源的服务范围，其中阿拉斯加、科罗拉多、佛罗里达、密西西比以及蒙大拿州新增了大量公用事业单位官方边界数据。*** ***版本3.0于2026年3月17日更新：本次更新发布了临时与非临时非社区供水系统的服务范围数据。***