I thought I would share this tip. I work for the a water/sewer department and there are many of our customers who are pool owners who do not realize we do this. NOT saying your water company will, but they might, and it never hurts to ask them.
We bill for water and sewer together. If you have both water and sewer and receive one bill for the two combined, make sure to check with the water company to see if they will adjust your sewer on your bill when you fill your pool or add lots of water to it. For instance... say your minimum bill is $40.00, $20.00 water, $20.00 for sewer. Lets say you fill your pool giving you a $400.00 bill ($200.00 water, $200.00 sewer). Since we know that water is not going into the sewer, we would adjust your sewage to make your bill $200 water, $20.00 sewer, making your total $220.00 instead of $400.00. If you use more than your monthy minimum, we simply average out your average sewer and adjust accordingly.
Just thought I would share!