How fast does a septic tank fill up?
This depends on how much waste your household produces. Most waste that comes out of a home is liquid with very little solid included. Thankfully this easily leaves the tank to either the municipal wastewater system if that is available or the drain field. The solid portion of waste takes a few years to build up. As mentioned previously, it is generally recommended to empty tanks every 5 years, but some people have reported up to 10 years between pump outs.