River Water Quality Monitoring 1990 to 2018 - Nitrate

<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This table provides the raw data from river monitoring sites including Water Framework Directive monitoring sites. It should be noted that, as the data set is in its raw state, it cannot be used to provide a status without processing. The data set does not show Limits of Detection or Limit of Quantitation which would require a value to be treated as a half value for WFD calculation. In addition both altitude and alkalinity affect status calculations for some parameters. The data set may contain results which are erroneous due to typos, sampling error or contamination, such data points are usually several orders or magnitude above expected values.</SPAN></P><P><SPAN>This is the first in a series of water data sets being made available as Open Data. Other data sets remain available on request via [e-mail]</SPAN></P><P><SPAN>The European Water Framework Directive (2000/60/EC) has been transposed into Northern Ireland regulations through The Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment) (Northern Ireland) (EU Exit) Regulations 2019 ensures that the Water Framework Directive (WFD) (as transposed) and the various supporting pieces of water legislation continue to operate here after 1 January 2021. The regulation encourage the active involvement of interested parties and the general public.</SPAN></P><P><SPAN>The regulations set out the requirement to achieve 'Good Ecological Status' and 'Good Chemical Status' for all ground and surface waters (rivers, lakes, transitional waters, and coastal waters) within Northern Ireland.</SPAN></P><P><SPAN>Surface waters are assessed according to the following criteria:</SPAN></P><UL><LI><P><SPAN>Biological quality (fish, invertebrates, flora)</SPAN></P></LI><LI><P><SPAN>Hydromorphological</SPAN></P></LI><LI><P><SPAN>Physico-chemical properties like temperature, oxygenation and nutrient conditions.</SPAN></P></LI><LI><P><SPAN>Chemical quality assessed against environmental quality standards for specific pollutants and priority substances.</SPAN></P></LI></UL><P><SPAN>The following physio-chemical and chemical parameters are included in the data set:</SPAN></P><UL><LI><P><SPAN>NO3-N (mg/l)- Nitrate</SPAN></P></LI></UL></DIV></DIV></DIV>本表格提供了河流监测站点，包括水框架指令（Water Framework Directive, WFD）监测站点的原始数据。需注意，本数据集处于未处理状态，未经处理无法用于开展水体状态评估。数据集未包含检出限（Limits of Detection）与定量限（Limit of Quantitation）相关信息，而此类限值数值在水框架指令计算中需按半值处理。此外，海拔与碱度会对部分参数的状态评估计算产生影响。本数据集可能存在因笔误、采样误差或污染导致的异常数据，此类异常值通常较预期数值高出数个数量级。 本数据集为首批以开放数据形式发布的水文数据集系列之一，其余数据集可通过[e-mail]申请获取。 欧洲水框架指令（2000/60/EC）已通过《2017年水环境（水框架指令）规例（北爱尔兰）》纳入北爱尔兰本地法规体系。《2019年水（修订）（北爱尔兰）（欧盟脱欧）规例》确保经转化后的水框架指令（WFD）及各类配套水立法，可在2021年1月1日后于北爱尔兰地区继续有效。上述规例鼓励利益相关方及社会公众积极参与。 上述规例明确要求，北爱尔兰境内所有地下水及地表水（河流、湖泊、过渡水域与近岸海域）均需达到"Good Ecological Status"与"Good Chemical Status"。 地表水评估遵循以下标准： - 生物质量（鱼类、无脊椎动物、水生植物） - 水文形态学 - 理化性质，包括温度、溶解氧与营养盐状况 - 化学质量：针对特定污染物及优先管控物质的环境质量标准进行评估。 本数据集包含如下理化与化学参数： - 硝酸氮（NO3-N，单位：mg/l）