The adult became stranded on the patch of land at Horbury Lagoon at around 5pm yesterday (Saturday).
A water rescue team had to use specialist equipment to rescue the casualty, who was then left in the care of Yorkshire Ambulance Service.
Fire crews from Ossett, Dewsbury and Rothwell were called to the scene in Forge Lane.
Elsewhere in West Yorkshire, firefighters were called to Bradford to perform a rescue around an hour earlier.
A young person had become stranded on an island in Bradford after going through ice on a pond.
Water rescue crews used specialist equipment was again used, with the youth left in the care of paramedics.
Fire crews from Odsal, Fairweather Green, Rastrick and Leeds attended.
They say hidden dangers can lurk beneath the surface of ponds, lakes and flooded quarries, such as discarded waste which can trap people, as well as slippery rocks and sudden changes in water depth.
Artur Sevcov, a married father-of-one, had been almost four times the drink-drive limit when he stripped naked and got into the water at the former quarry on an August evening.
The 32-year-old had been on a camping trip with friends and family for the weekend.
His body was found by an underwater police rescue team at around 3pm next day, approximately five metres below the surface.