River Water Quality Monitoring 1990 to 2018 - Nitrite

<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>NO2-N(mg/l)- Nitrite</SPAN></P></LI></UL></DIV></DIV></DIV>本表格提供了河流监测站点（含水框架指令（Water Framework Directive, WFD）监测站点）的原始监测数据。需注意，本数据集处于未处理的原始状态，未经处理无法用于水体状态评估。数据集未包含检测限（Limit of Detection, LOD）与定量限（Limit of Quantitation, LOQ）信息，而在WFD相关计算中，低于定量限的数值需按半值处理。此外，海拔与碱度会对部分参数的状态计算产生影响。本数据集可能存在因排版错误、采样误差或污染导致的异常结果，此类异常数据点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系列水环境数据之一。其余数据集可通过邮件[e-mail]申请获取。 欧盟《水框架指令》（2000/60/EC）已通过《2017年水环境（水框架指令）条例（北爱尔兰）》转化为北爱尔兰本地法规。《2019年水（修正案）（北爱尔兰）（脱欧）条例》确保了已转化的《水框架指令》（WFD）及各类配套水环境法规在2021年1月1日后仍可在北爱尔兰有效实施。上述条例鼓励利益相关方与社会公众的积极参与。 上述条例要求北爱尔兰境内所有地下水与地表水（包括河流、湖泊、过渡水域及近岸海域）均需达到“良好生态状态”与“良好化学状态”。 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） - 水文形态学指标 - 物理化学属性（如温度、溶解氧及营养盐状况） - 化学质量依据特定污染物与优先管控物质的环境质量标准进行评估。 本数据集包含以下理化与化学参数： - 亚硝态氮（NO2-N，单位：mg/l）- 亚硝酸盐