Septic systems: the complete owner's guide.

How the three parts work, what each one needs, what the rules are in our seven states, and what everything costs.

Conventional residential system — section view Not to scale

The three parts

Almost every failure traces back to one of three components, and they fail in different ways on different timelines.

The tank
A settling chamber. Solids sink, grease floats, clear liquid moves on. Maintenance is pumping — how often depends on four things.
The drainfield
Where treatment actually happens, in the soil. It fails slowly and then all at once — here is what that looks like.
Disposal
Where the load goes after it leaves your property. A permitted receiving facility, tracked and manifested.

Chapters

Maintenance

The three-year cadence and what shortens it.

Diagnosis

Which symptoms mean stop using water right now.

Transactions

Line by line, and what makes a closing slip.

Money

Real Midwest ranges, not national averages.