Calderdale police showed ice bucketers how it's done when they got West Yorkshire Fire and Rescue Service to douse them in freezing water.
The cops uploaded a video of themselves being drenched by firefighters with buckets of water and ice donated by Halifax Asda.
At the start of the video, district commander Chief Superintendent Angela Williams nominated the other four West Yorkshire Police districts to take the challenge - Kirklees, Wakefield, Bradford and Leeds.
She said: "This was a bit of fun and all in a good cause. We did it in our own time and made sure the uniforms weren't ruined and although we are still collecting the money I know there has already been a lot of money coming in for charity.
"I would like to thank ASDA for providing the ice that froze us all and PC Lisa McDonald who organised everything. We have now nominated the four other districts, so now's the time to get wet!"
Millions of people around the world have taken up the challenge, which started as a fundraising drive for ALS, known in the UK As Motor Neurone Disease.
Calderdale Police are taking donations at the public enquiry counter at Richmond Close Police Station, Halifax.