Impaired Waters Rule (IWR) Stations

Statewide coverage of sampling locations (stations) primarily from WIN, STORET, SBIO, USGS & Legacy STORET providing data for the IWR Run 67 database. All available historic data are included in the database, therefore some stations may not contain any data used in current assessments. A station can only be used for IWR assessment purposes if it represents ambient water quality of surface water and the station can be definitively tied to one of the ~6,700 water bodies which we assess. A station will not be included in this coverage if it samples wastewater effluent, groundwater, is a rain gauge, etc.本数据集的采样点位（监测站）实现全州范围覆盖，数据主要取自WIN、STORET、SBIO、美国地质调查局（USGS）及Legacy STORET，用于为IWR Run 67数据库提供数据支撑。该数据库纳入了所有可获取的历史数据，因此部分监测站可能未包含当前评估所需的有效数据。仅当监测站表征地表水的环境水质，且可明确关联至本次评估覆盖的约6700个水体之一时，方可用于IWR评估工作。若监测站采集的是废水排放口水样、地下水数据，或为雨量计等非地表水水质监测点位，则不会被纳入本次覆盖范围。