Dublin City Council and Inland Fisheries Ireland are investigating the source of pollution, which has killed hundreds of fish in the River Tolka on Dublin’s northside.

The waterway has become choked with a white foam over a 2km stretch from the Finglas Road Bridge near Glasnevin Cemetery, to Griffith Park, a section which runs near the National Botanic Gardens.

The river has been repopulated with trout and salmon in recent years following a significant improvement in the cleanliness of the waters….

Irish Times 22/07/2014 ‘Pollution kills hundreds of fish in Tolka River in Dublin