Wisconsin Counties require every three years

I have a 1,500 gallon conventional with a drainage field out back - Basically a two acre sand box in WI

I pull the cement cover for the pumper , we clean the filter , and he pumps away complaining every time on how much toilet paper we use

I blame the wife of course

$150.00 every three years for inspection and pumping - Price has almost doubled in twenty years , just like everything else

And trust me , they will fine you if it’s not inspected , pumped and paperwork sent in to the county

So far so great , going on twenty five years since the house was built