Utah DDW Surface Water Source Protection Zones

These data represent the Drinking Water Source Protection (DWSP) zones for surface water sources operated by Public Water Systems (PWS) in Utah. These zones have been delineated by PWS to comply with the requirements of Utah Administrative Code (UAC) Rule R309-605. Zone 1: (A) Streams, rivers and canals: zone 1 encompasses the area on both sides of the source, 1/2 mile on each side measured laterally from the high water mark of the source (bank full), and from 100 feet downstream of the POD to 15 miles upstream, or to the limits of the watershed or to the state line, whichever comes first. If a natural stream or river is diverted into an uncovered canal or aqueduct for the purpose of delivering water to a system or a water treatment facility, that entire canal will be considered to be part of zone 1, and the 15 mile measurement upstream will apply to the stream or river contributing water to the system from the diversion. (B) Reservoirs or lakes: zone 1 is considered to be the area 1/2 mile from the high water mark of the source. Any stream or river contributing to the lake/reservoir will be included in zone 1 for a distance of 15 miles upstream, and 1/2 mile laterally on both sides of the source. If a reservoir is diverted into an uncovered canal or aqueduct for the purpose of delivering water to a system or a water treatment facility, that entire canal will be considered to be part of zone 1, and the 15 mile measurement upstream will apply to the reservoir and tributaries contributing water to the system. Zone 2: Zone 2 is defined as the area from the end of zone 1, and an additional 50 miles upstream (or to the limits of the watershed or to the state line, whichever comes first), and 1000 feet on each side measured from the high water mark of the source. Zone 3: Zone 3 is defined as the area from the end of zone 2 to the limits of the watershed or to the state line, whichever comes first, and 500 feet on each side measured from the high water mark of the source. Zone 4: Zone 4 is defined as the remainder of the area of the watershed (up to the state line, if applicable) contributing to the source that does not fall within the boundaries of zones 1 through 3.本数据集涵盖犹他州由公共供水系统（Public Water Systems, PWS）管理的地表水水源的饮用水水源保护（Drinking Water Source Protection, DWSP）区划。上述区划由公共供水系统划定，以符合犹他州行政法规（Utah Administrative Code, UAC）第R309-605条的要求。 1区： （A）溪流、河流与运河：1区涵盖水源两侧的区域，以水源的满岸高水位线为基准向两侧横向延伸0.5英里，范围从取水点（Point of Diversion, POD）下游100英尺处延伸至上游15英里处，或以先抵达的流域边界、州界为限。若天然溪流或河流被改道至未加盖的运河或渡槽，用于向供水系统或水处理厂输水，则整条运河均视为1区的组成部分，且上游15英里的范围将适用于向该系统输水的改道溪流或河流。 （B）水库或湖泊：1区为以水源高水位线为基准向四周延伸0.5英里的区域。任何汇入该湖泊/水库的溪流或河流，其上游15英里范围内以及两侧横向0.5英里的区域均纳入1区。若水库的水体被引至未加盖的运河或渡槽，用于向供水系统或水处理厂输水，则整条运河均视为1区的组成部分，且上游15英里的范围将适用于向该系统输水的水库及其支流。 2区：2区的范围为1区的末端向上游再延伸50英里（或以先抵达的流域边界、州界为限），且以水源高水位线为基准向两侧横向延伸1000英尺。 3区：3区的范围为2区的末端至流域边界或州界（以先到者为准）之间的区域，且以水源高水位线为基准向两侧横向延伸500英尺。 4区：4区为汇入该水源的流域范围内未纳入1至3区的剩余区域（若涉及州界，则范围不超过州界）。