If you have to pump your cesspool more than once a year it is time to upgrade to a new cesspool.
If you have a Block Cesspool from the 1930s, 40s, 50s or early 60s you should fill it in and replace it with a Precast Cesspool. A dip in your lawn is an indication that
your Block Cesspool is caving in.
Note – most houses have two cesspools. Always pump out and treat both cesspools before you replace your cesspool