That is a wonderful idea. I think you could follow the premise used for water storage from wells. I would still use some type of filtration to stop sediment build-up.

Call a few well diggers in your area.

Here in the Boston area we pay a premium for our water ($1600/year). And some towns will not let you drill a well.

Please post here and let us know how you make out.

Thanks so much for your suggestion. I've been so focused on containing the sump pit water that I didn't even think about tapping into the water with a well. I'm going to look into the costs and see what I can do. As of now, I'm putting a big plastic tub under the pipe outside and using buckets to water our yard and garden. Of course, when I get sidetracked it overflows. We are currently under a water emergency due to a drought and are not allowed to use city water for our yards. Thanks again for helping me see other options.

A well tank is not appropriate. They are designed to hold pressure and limited water.

There are a number of plastic tanks used just for this purpose. Usually used to catch water off of roofs, but can be used with sump pumps.

Do a Google ON Rainwater Irrigation and you will find all kinds of sources.

I like the suggestions on storage tanks and no one asked what area of the country / world you are located and what about freeze protection for these tanks and another small pump to pump the water out of these storage tanks

has anyone had suggested you ask the local plumber what is the frost line and then bury the tanks below the frost level and install a pump inside these tanks now your talking

Also when faced with a water condition of continues water entering a structure you should think about a duel pump system lead and lag so as not to run one pump 24 -7.

Has anyone suggested catching the water before it enters your home by installing a perforated pipe and redirecting the water away?