Historic General Quality Assessment (GQA) Headline Indicators of Water Courses

The General Quality Assessment (GQA) Headline Indicator scheme or GQAHI (previously known as GQA) was the national indicator for water quality in rivers and canals. It was designed to provide an accurate and consistent assessment of the state of water quality and how it changes over time. These assessments were made for Biological, Chemical and Nutrients and undertaken for discrete river stretches. This is now a static dataset and 2009 was the final year of the scheme.

《综合水质评估（GQA）标题指标体系》或称GQAHI（之前称为GQA），是我国河流与运河水质的国家指标。该体系旨在提供对水质状况及其随时间变化的准确且一致的评估。评估内容涵盖生物、化学和营养物质，针对特定河流段落进行。目前，该数据集已处于静态状态，2009年为该体系的最后一年。