They are particalarly suited to small towns and villages where land may be relatively inexpensive and also to landfills and mine closures where toxic leachate is a big issue.
Prior to 1990, water in the Annestown Stream was of very poor quality with little or no fish life and has subsequently improved to near good status with the return of sea trout to the stream after many years of abscence.
In recent times there are a number of ICWs serving municipal waste from small towns and villages.
Polluted surface water streams are being treated by ICWs and the areas have subsequently served as recreational areas and parks for the local communities.
This type of amenity helps to create an awareness of the importance water quality among the local population while also increasing the presence of wildlife and in turn increasing biodiversity.