Maine DMR Public Health - Shellfish Water Quality Data

The Department of Marine Resources (DMR) Bureau of Public Health collects surface water grab samples at approximately 1,200 water quality monitoring stations along the Maine coast year-round. Samples are processed in the lab via membrane filtration and enumerated for fecal coliform bacteria. Fecal coliform results are reported as the number of colony forming units (individual bacterium capable of forming colonies) per 100mL of water. DMR scientists analyze data from each station and calculate annual summary statistics using at least 30 of the most recent samples collected under a systematic-random sampling strategy. These values, along with sanitary surveys of the area, help determine whether the water quality is acceptable for harvesting molluscan shellfish. For more information about water quality monitoring and the classification of shellfish flats, visit https://www.maine.gov/dmr/fisheries/shellfish/shellfish-growing-area-classification. This table comprises data from the current year and previous five years for all active and investigative monitoring stations. Current year data are inclusive up to one month prior to the current month. Water quality data are QC-checked monthly, and this table is updated with the previous month's data two weeks into the current month. Header Description Station Unique identifier of monitoring station Site Waterbody monitored by station (not listed for all stations) Growing_Area Shellfish growing area where station is located Sample_Datetime Date and Time when water sample was collected (ET in ESRI GIS products, may appear UTC in CSV/Excel) Sample_Datetime_Local For CSV/Excel users: Use this field for correct local collection time (ET) Salinity Salinity in Parts Per Thousand (PPT). Measured from sample water using a refractometer (precision +/- 1 PPT) Temperature Temperature in degrees Celsius. Measured at water surface using a calibrated bimetallic dial thermometer CFU_100mL Density of fecal coliform bacteria in the surface water sample measured as Colony Forming Units (CFU) per 100 mL Adversity Field observations of conditions that may adversely impact bacteria levels in the water B: Boats – 5 or more enclosed boats that may have a marine sanitation device (head) on board H: Habitation – observed occupation of seasonal homes along the shoreline M: Marina – shoreside business with 10 or more enclosed boats in the water N: Nonpoint source runoff P: Precipitation – occurring presently or within the past 24 hours S: Sewage treatment plant bypass or malfunction T: Thaw – snow and ice melt W: Wildlife – typically waterfowl, documented when 10 or more animals are observed Open_Closed Harvesting status of shellfish growing area where sample was collected Open: Open for shellfish harvesting Closed: Closed to shellfish harvesting Method Method by which station was accessed L: Accessed from Land by wading into water B: Accessed by Boat Strategy Sampling strategy R: Random (sample collected on a randomly chosen date) A: Adverse (sample collected in an area or at a time of year when bacteria levels are expected to be elevated) X: Investigative (sample collected in a previously unsampled area – not used to determine suitability of harvest area) Lab DMR laboratory where sample was processed LAM: Lamoine BBH: Boothbay Harbor Latitude Station Latitude in decimal degrees Longitude Station Longitude in decimal degrees缅因州海洋资源部（Department of Marine Resources, DMR）公共卫生局全年在缅因海岸约1200个水质监测站点采集表层水瞬时水样。实验室采用膜过滤法处理样本，并对粪大肠菌群进行计数。粪大肠菌群的检测结果以每100毫升水中的菌落形成单位（Colony Forming Units, CFU，即可形成菌落的单个细菌）数量进行报告。 DMR的科研人员会对各站点的数据进行分析，基于系统随机采样策略下收集的至少30份最新样本，计算年度汇总统计量。上述数值结合区域卫生调查结果，可用于判断该水域是否符合双壳类贝类收获的水质要求。如需了解更多水质监测及贝类养殖区分类的相关信息，请访问：https://www.maine.gov/dmr/fisheries/shellfish/shellfish-growing-area-classification。 本表格包含当前年份及此前五年所有活跃监测站点与调查监测站点的数据。当前年份的统计数据截止至当前月份的前一个月。水质数据每月均会开展质量控制（Quality Control, QC）核查，本表格会在当前月份的第二周更新上月的数据集。 ### 表头说明 Station：监测站点的唯一标识符 Site：站点所监测的水体（并非所有站点均标注该字段） Growing_Area：站点所在的贝类养殖区 Sample_Datetime：水样采集的日期与时间（在ESRI GIS产品中为东部时间（Eastern Time, ET），在CSV/Excel文件中可能显示为协调世界时（Coordinated Universal Time, UTC）） Sample_Datetime_Local：针对CSV/Excel用户的本地采集时间字段（东部时间ET），用于获取准确的本地采集时间 Salinity：以千分比（Parts Per Thousand, PPT）表示的盐度，采用折射仪对样本水体进行测量，测量精度为±1 PPT Temperature：以摄氏度表示的表层水温，通过校准的双金属盘式温度计在水面处测得 CFU_100mL：表层水样中粪大肠菌群的密度，以每100毫升水中的菌落形成单位（CFU）计数 Adversity：可能影响水体细菌水平的现场观测状况，各代码含义如下： B：船只（Boats）：观测到5艘及以上配备船用卫生装置（厕所）的封闭船只 H：居住设施（Habitation）：沿岸季节性住宅的使用观测 M：码头（Marina）：沿岸经营且水域内停泊10艘及以上封闭船只的场所 N：面源径流（Nonpoint source runoff） P：降水（Precipitation）：当前或过去24小时内出现降水 S：污水处理厂溢流或故障（Sewage treatment plant bypass or malfunction） T：融冻（Thaw）：冰雪融化 W：野生动物（Wildlife）：通常为水禽，当观测到10只及以上动物时予以记录 Open_Closed：采集水样所在贝类养殖区的收获状态： Open：开放贝类收获 Closed：禁止贝类收获 Method：站点的通行方式： L：从陆地涉水进入监测区域 B：乘船抵达监测区域 Strategy：采样策略： R：随机采样（在随机选定的日期采集样本） A：异常采样（在预计细菌水平升高的区域或季节采集样本） X：调查采样（在此前未采样的区域采集样本，不用于评估养殖区的收获适宜性） Lab：处理样本的DMR实验室： LAM：拉莫因（Lamoine）实验室 BBH：布斯贝港（Boothbay Harbor）实验室 Latitude：站点纬度，以十进制度数表示 Longitude：站点经度，以十进制度数表示