Oh, the woes of being on a septic system. When we bought our place 3 years ago neither of the tanks had been pumped for a couple of years. There were two houses, one much older than the other. About a year later we had problems with the "younger house" so we had it pumped. A month later the other house needed it. We were also told it would only be every couple of years after that depending on the number of people in the house. We were also told to put yeast down the commode to aid in the bacteria. It cost about $80 to have it pumped.
When we built the new house (the other 2 are still here just a guest houses) we put in an aeration system (waters the pasture) but it is required to have a maintenance contract to get passed by the county. It also uses chlorine before it aerates the field.
Well-behaved women seldom make history!