DEC Drinking Water Protection Areas

Drinking Water Protection Areas (DWPAs) are delineated areas around public water system sources created to meet the requirements of the Safe Drinking Water Act. This feature service is publicly available to promote the protection of public drinking water sources and also allows DEC staff to add the data to ArcGIS Pro for local desktop analysis and export. Local governments and state agencies are encouraged to use this data when reviewing permits for activities that may affect a public drinking water source. DWPAs can also be used to help determine sampling and monitoring requirements for public water systems. The data is updated daily. Note that any data downloaded or exported locally is only current as of the date and time of download; regular exports are recommended to ensure you are working with the most current version. Zone Definitions DWPAs are divided into Zones A, B, C, E, F, and G. Zone definitions vary depending on the source type: groundwater, surface water, or groundwater under the direct influence (GWUDI) of surface water. Note: Zone D (10-year Time of Travel) has been discontinued. Zone A — Groundwater: equivalent to several months' Time of Travel. Surface water: 1,000-foot buffer. Zone B — Groundwater: equivalent to 2-year Time of Travel. Surface water: 1-mile buffer. Zone C — Surface water: equivalent to the immediate watershed. Zone E — GWUDI: 1,000-foot buffer of the nearest surface water body. Zone F — GWUDI: 1-mile buffer of the nearest surface water body. Zone G — GWUDI: watershed contributing to the nearest surface water body. Provisional Protection Areas — A 1,000-foot buffer around a regulated well or intake that is new or has not yet received a Source Water Assessment delineation. For further information, visit the Source Water Assessment resource page. Users are also encouraged to use this service alongside the Alaska DEC Drinking Water Protection Areas Web Map. Questions regarding this data can be directed to the DEC Drinking Water Protection Program at 907-269-7549 or via email at [e-mail]饮用水保护区（Drinking Water Protection Areas，简称DWPAs）是为满足《安全饮用水法》要求，围绕公共供水系统水源划定的区域。本要素服务面向公众开放，旨在助力公共饮用水水源保护工作；同时也可供阿拉斯加州环境保护署（Department of Environmental Conservation，简称DEC）工作人员将数据导入ArcGIS Pro，开展本地桌面端分析与导出操作。鼓励地方政府与州级机构在审查可能影响公共饮用水水源的活动许可时，使用本数据集。饮用水保护区亦可用于协助确定公共供水系统的采样与监测要求。本数据每日更新。请注意：本地下载或导出的数据仅在下载当日即时有效；建议定期导出数据，以确保使用的是最新版本。 分区定义：饮用水保护区分为A、B、C、E、F、G共6个分区，各分区的定义依据水源类型而异，包括地下水、地表水，以及受地表水直接影响的地下水（Groundwater Under the Direct Influence of Surface Water，简称GWUDI）。注：D分区（10年移动时间）已停用。 A分区——地下水：对应数月移动时间范围；地表水：1000英尺缓冲带。 B分区——地下水：对应2年移动时间范围；地表水：1英里缓冲带。 C分区——地表水：对应紧邻流域范围。 E分区——受地表水直接影响的地下水（GWUDI）：以最近地表水水体为中心的1000英尺缓冲带。 F分区——GWUDI：以最近地表水水体为中心的1英里缓冲带。 G分区——GWUDI：汇入最近地表水水体的流域范围。 临时保护区：针对新建或尚未完成水源评估（Source Water Assessment）划定的合规水井或取水口，设置的1000英尺缓冲带。如需获取更多信息，请访问水源评估（Source Water Assessment）资源页面。建议用户将本服务与阿拉斯加州环境保护署饮用水保护区网页地图配合使用。若对本数据集有任何疑问，请致电907-269-7549或发送邮件至[e-mail]，联系阿拉斯加州环境保护署饮用水保护项目组。