Mine is plumbed in to the sewer too.

If you're worried about damaging your lawn, I did a partial drain to lower CYA last year at a house I was renting. I put 6 or so thousand gallons in to the yard and it turned it green.... like a yard should be, as we were under water rationing and could only water for a few hours one day a week. The yard had a nice slope, so I didn't have to worry about it getting to close to the house. The ground was so dry, it just kept soaking it up.

If you're in a drought area, see how much the ground will take. You'll get a big boost in green grass now, and you won't have to water nearly as much for the next month or so to keep it going.

Storm sewer is an option if you have one.

If you are on a waste sewer system, put your hose in the access port and keep an eye on it to be sure it doesn’t back up in to the house. (check local regulations etc. first…)