How to clean up polluted water from the floor?

[City Builder]

I mistakenly told the duplicants to empty a jug of polluted water forgetting they'd just spill it on the floor.

How do I clean up the polluted water from the floor?

[Sillls]

Mop it up.
Use an icon that looks like a mop and use it on the floor. But it won't work if water is too deep. If that happens, you will need to spread the water out.

This works for clean water to.

[Angpaur]

Press "m" key and select area to mop.
Also there is a "mop" button in right bottom menu.