An environmental scheme is aiming to keep pollution out of rivers and streams by marking drains with a simple symbol.
Yorkshire Water has delivered the Yellow Fish scheme in Bingley with support from Shipley MP Anna Dixon and Bingley East councillor Susan Fricker.
The project involves installing yellow fish symbols next to drains to remind people that only rainwater should enter them, as these drains flow directly into nearby watercourses without treatment.
Emily Eden, river health investigation and engagement lead at Yorkshire Water, said: "Many people don’t realise that surface water sewers can be separate from the foul sewer system, and that what goes in there doesn’t necessarily go to a wastewater treatment site.
"Instead, oils, detergents, paints, and other harmful substances make their way into local watercourses.
"Yellow Fish discs are a small reminder that only rain should go down these drains and to avoid putting anything else in them.
"It’s brilliant to have had the support of MP Anna Dixon, Cllr Susan Fricker, and Bingley Labour on this rollout – the more hands we have, the more areas we can target for installation, and the more watercourses we can protect."
During a two-day installation effort, 150 Yellow Fish discs were placed around drains in Eldwick and Bingley by Yorkshire Water’s river health team, Ms Dixon, Cllr Fricker, and members of Bingley Labour.
The scheme is part of Yorkshire Water’s wider efforts to improve water quality across the region.
A spokesperson for Yorkshire Water said that 46 pilot discs were previously installed in the New Mill area of Holme Valley alongside River Holme Connections, with further installations planned in a number of additional locations.
The utility company is working with community groups, councillors, and councils in each location to deliver the scheme, as the highway drains are owned by local authorities.
Cllr Susan Fricker said: "It’s great to see the Yellow Fish scheme in Bingley; Only Rain Down the Drain is a global initiative to educate communities and support improved water quality.
"Look out for the Yellow Fish in Bingley and beyond as the work continues."
Yorkshire Water is also investing in wider improvements to river health and bathing water quality, including a £1.5 billion programme to reduce storm overflow discharges and £350 million to lower phosphorus levels in treated wastewater.
Anyone who spots pollution in a nearby watercourse is urged to report it to Yorkshire Water and the Environment Agency for investigation.