Stormwater quality

Urban areas contain numerous diffuse pollutants sources, which are released during wet weather.

One of the most important sources is wash-off of urban surfaces, including building facades and road pavements, and wash-out of stormwater transport elements, such as gutters, sewers and ponds. Two aspects of stormwater pollutants are of particular importance: (i) entry of harmful chemicals or microbiological agents into urban stormwater, and (ii) remedial measures, usually in the form of treatment. In order to develop treatment solutions, knowledge on the content of the water to be treated is needed.