Schools and community groups are being urged to get involved in a campaign to help improve water quality in and around the River Clun.
The Yellow Fish campaign aims to stop people pouring oil, paints, solvents or chemicals into surface water drains or gullies on the side of the road.
Anything poured into these drains ends up in rivers, streams and the sea. Many people are unaware that these materials can poison fish and wildlife and smother plants - and because of the way these contaminants spread, it takes only a tiny amount to harm the water environment.
The campaign will see schoolchildren and community groups painting stencils of fish on pavements near drains to raise awareness that anything poured down them will come into contact with wildlife.
The campaign, funded by Natural Resources Wales and organised by Keep Wales Tidy, takes place throughout June and July.
It is an ideal opportunity for schools, community groups and businesses to help raise awareness of water pollution. Volunteers choose a safe area and mark drains with the Yellow Fish sign. Following this, awareness is raised locally with leaflets and posters.
Let us know via Twitter or Facebook when you see a Yellow Fish in your neighbourhood - #YellowFish