Though open houses for the Water Works are usually held on the 2nd Saturday of May-Oct, this year the September open house will be held on the 3rd Saturday (Sep. 16), to coincide with the Historic Homes Tour. The Water Works is a stop on the Historic Homes Tour. Even if you're not taking part in the Historic Homes Tour, you can still tour the Water Works free (donations appreciated) on Sep. 16, 10 a.m. to 4 p.m.