Sacramento-San Joaquin Delta and Suisun Bay 2021 Water Quality Data (15 Minute) CEMP, DWR

The Continuous Environmental Monitoring Program (CEMP) monitors real-time water
quality conditions throughout the Sacramento-San Joaquin Delta (the Delta) and Suisun Bay.
Data is transmitted to the California Data Exchange Center (CDEC) via wireless telemetry in
real-time, providing publicly available environmental data related to the Delta and Suisun Bay.
Real- time data is continously collected at 15-minute intervals at 15 stations throughout the
Delta and Suisun Bay. YSI EXO sondes are used as standalone water quality instruments at each
station. The water quality data collected by CEMP guides the operations of the California
State Water Project to maintain mandated water quality standards within the Delta and Suisun
Bay. Water quality standards are established for DWR by Water Right Decision 1641. All 15 of
CEMP’s continuous water quality stations are included in this dataset for the calendar year of
2021. CEMP has collected water quality data in the Sacramento- San Joaquin Delta and Suisun
Bay since the mid-1980s. Over the past 4 decades, CEMP’s monitoring scope has continuously
increased in the number of monitoring locations and the amount of water quality analytes
monitored. CEMP has strove to deploy the most up to date water quality monitoring technology
at all of its monitoring stations. Currently, there are 15 water quality stations maintained
by CEMP. All water quality monitoring stations collect data every 15 minutes, 365 days a year
and are sent in real-time via telemetry. Core Tenets of CEMP: • to obtain consistent and
accurate data in real-time at established monitoring stations • to provide data necessary to
achieve compliance with salinity, flow, and dissolved oxygen standards • to perform data
analyses for further understanding of estuarine ecology • to report information to other
government agencies, as well as the public, for the purpose of management and conservation of
the upper San Francisco Estuary (SFE). • to provide continuous water quality monitoring
expertise for other groups within DWR and sister agencies for the benefit of ecological
studies throughout the San Francisco- Sacramento Estuary

持续环境监测计划（Continuous Environmental Monitoring Program, CEMP）实时监测萨克拉门托-圣华金三角洲（Sacramento-San Joaquin Delta，简称三角洲）与苏森湾的水环境质量状况。监测数据通过无线遥测技术实时传输至加州数据交换中心（California Data Exchange Center, CDEC），向公众开放与三角洲及苏森湾相关的环境数据。该计划在三角洲与苏森湾的15个监测站点以15分钟为间隔持续采集实时数据，每个站点均采用YSI EXO水质探头（YSI EXO sondes）作为独立水质监测设备。CEMP采集的水质数据用于指导加州州立水利工程的运行，以维持三角洲与苏森湾内法定的水质标准。水质标准由加州水资源部（Department of Water Resources, DWR）依据《水权决策1641号》（Water Right Decision 1641）制定。本数据集涵盖了2021日历年期间CEMP全部15个连续水质监测站点的监测数据。

CEMP自20世纪80年代中期起便开始在萨克拉门托-圣华金三角洲与苏森湾采集水质数据。四十余年来，该计划的监测范围持续拓展，覆盖的监测点位与水质监测指标不断增加。CEMP始终致力于在所有监测站点部署最先进的水质监测技术。目前，CEMP共维护15个水质监测站点。所有监测站点均全年无休、每15分钟采集一次数据，并通过遥测技术实时传输数据。

CEMP的核心原则如下：
• 在既定监测站点获取实时、一致且精准的监测数据
• 提供满足盐度、流量与溶解氧标准合规性所需的数据支撑
• 开展数据分析以深化对河口生态系统的认知
• 向其他政府机构及公众披露相关信息，用于旧金山河口上游（San Francisco Estuary, SFE）的管理与保护工作
• 为加州水资源部（DWR）及同级机构内的其他团队提供持续的水质监测专业技术支持，助力旧金山-萨克拉门托河口全域的生态研究