Think of the fish when you start that DIY summer project, says the environmental protection team at Greater Wellington Regional Council.
People need to be careful using products that can run into stormwater drains as they can damage aquatic life, says Susan Smith, environmental protection team leader.
"People don't realise some of the drains discharge into the closest stream," Ms Smith says.
She said in summer they find an increase in pollution incidents resulting from do-it-yourself activities when more people are outside painting, cleaning the house or washing the car.
"People will ring in and say such and such stream is running white," she says.