Will companies install a new leach field without a permit? Around here conventional systems have to be replaced with aerobic systems now. Not sure why since the conventional leach bed system lasts like 50 years. The tanks are concrete they aren't going anywhere. It's like 20k for an aerobic system and maybe like 7k to replace a leach field.
"have to be replaced"
Meaning they need to be replaced by X date ('cause this is gonna be a problem for a lot of folks)?
Septic regulation varies wildly. If they are mandating replacement, I'd assume there is a permit process and they have records of existing septic. I'd be surprised if they are forcing everyone to dig all this up - lots of people aren't going to be able to eat that cost. I'd get it if any new modifications or additions require a modern approach.
An aerobic system is going to require two circuits. One for the pump and the other for the alarm (they need to be separate, at least here).
How it works here:
You HAVE to have an engineered septic system.
To engineer a septic system, you have to do a "perc test" - which involves digging 3-4' holes in your "prospective" leach field and then getting the septic engineer out to have a look at them.
Once you have an engineered septic system, you apply for a permit to put it in.
You have to use contractors that are licensed to install septic.
The field gets inspected before being buried.
The tank must be filled with water for X days and inspected by the county.
If all is OK, the county issues a "permit to operate".
I spent nearly $20k on a traditional gravity feed system in 2020.
Having owned both, I'd much rather have traditional gravity feed.