Septic Diagnosis

Are there individuals locally that can diagnose and repair septic problems?
Tia

It will probably require 1/2 acre of well drained land for a drainage field to solve the problem, after installation of a proper septic tank.
My guess is that you have a cesspool that is terminal.
But....what do I know?

They can be pumped out if there is an opening. If your soil does not drain well then a drain field is ideal but who has room for one

I don't think either of the first 2 posts answered the OP's question. (Neither does mine but I at least refrain from unsolicited advice.)

I don't have his name but the man who pumped mine (he had to have someone make an opening) is next to Dr. Pepe Magana, the vet on the carretera in Riberas on the lake side. I would think he could help.