Public Water Supply Sources (Hosted Feature Service)

The Public Water Supply (PWS) datalayer contains the locations of public community surface and groundwater supply sources and public non-community supply sources as defined in 310 CMR 22.00. The public water supply systems represented in this datalayer are based primarily on information in the DEPs Water Quality Testing System (WQTS) database. The WQTS database is the Department?s central database for tracking water supply data. The PWS datalayer also contains the locations of proposed wells that have a defined DEP approved wellhead protection area (Zone IIs). Proposed sources are not currently tracked in WQTS. In ArcSDE the layer is named PWSDEP_PT. As stated in 310 CMR 22.02, a Public Water System means a system for the provision to the public of piped water for human consumption if such system has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days of the year. Such term includes (1) any collection, treatment, storage and distribution facilities under control of the operator of such a system and used primarily in connection with such system, and (2) any collection or pretreatment storage facilities not under such control which are used primarily in connection with such system. A public water system is either a community or a non-community water system. (a) Community water system means a public water system which serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents. (b) Non-community water system means a public water system that is not a community water system. 1. Non-transient non-community water system (NTNC) means a public water systems that is not a community water system and that regularly serves at least 25 of the same persons or more approximately four or more days per week, more that six months or 180 days per year, such as a workplace providing water to it?s employees. 2. Transient non-community water system (TNC) means a public water system that is not a community water system or a non-transient non-community water system but is a public water system which serves water to 25 different persons at least 60 days of the year. Some examples of these types of systems are: restaurants, motels, camp grounds, parks, golf courses, ski areas and community centers.公共供水（Public Water Supply, PWS）数据图层包含310 CMR 22.00中定义的公共社区地表水、地下水供水水源点，以及公共非社区供水水源点的位置。本数据图层所表征的公共供水系统，主要基于DEP水质检测系统（Water Quality Testing System, WQTS）数据库中的信息。WQTS数据库是该部门用于追踪供水数据的核心数据库。此外，该PWS数据图层还包含经DEP批准划定了井口区（Zone IIs）的拟建水井的位置，当前WQTS数据库尚未对拟建水源进行追踪。在ArcSDE中，该图层被命名为PWSDEP_PT。 依据310 CMR 22.02的规定，公共供水系统指为公众提供可用于人类消费的管道供水的系统，且该系统需满足以下任一条件：至少拥有15个服务接驳点，或在一年中至少60天内每日平均服务不少于25名使用者。该术语包含两类设施：（1）由该系统运营商管控、且主要服务于该系统的所有收集、处理、储存及配水设施；（2）虽不由该系统运营商管控，但主要服务于该系统的各类收集设施或预处理储存设施。 公共供水系统分为社区供水系统与非社区供水系统两类。 （a）社区供水系统：指服务于至少15个常住居民服务接驳点，或定期为至少25名常住居民提供供水服务的公共供水系统。 （b）非社区供水系统：指不属于社区供水系统的公共供水系统。 1. 非暂态非社区供水系统（Non-transient non-community, NTNC）：指不属于社区供水系统，且每周至少4天、每年至少6个月（或180天）定期为至少25名固定人员提供供水服务的公共供水系统，例如为员工提供供水的工作场所。 2. 暂态非社区供水系统（Transient non-community, TNC）：指既不属于社区供水系统，也不属于非暂态非社区供水系统，但在一年中至少60天内为25名不同人员提供供水服务的公共供水系统。此类供水系统的典型案例包括：餐厅、汽车旅馆、露营地、公园、高尔夫球场、滑雪场以及社区中心。