I offer well and septic inspections in all counties except for Macomb and Wayne counties.  These county health departments will have a list of their "Approved Evaluators".

One thing that I'd like to comment on.  Lately, I've seen several home inspection companies start to offer non-invasive septic inspections.  While they charge considerably less for this service, it's a terribly bad idea for a buyer and, if I may say so, very irresponsible on the inspector's behalf to even offer such a service. 

Septic systems require hands-on inspections, not looking at a tank full of water through a camera.  A non-invasive septic inspection WILL NOT identify key components, fluid levels, tank conditions, or correct system functionality.

My septic inspection process involves accessing the septic tank and drain field, if accessible, and observing conditions and flow through the system.  I check fluid levels in the tank, get photos inside of the tank, inspect for proper baffling / filter and then shock the system with a complete roll-over of it's volume.  It's a considerable amount of work and generally adds 2 hours to the inspection time.  However, adverse conditions can be incredibly costly to repair and often times involve complete replacement of the system which can reach upwards of $20,000. 

Let Pecars do a proper inspection so that you don't get burned with a HUGE repair bill.

The well portion of the inspection is relatively simple, but again, very costly to repair or replace.  I inspect the equipment in the home, the well head and it's proximity to the septic system.  I also place some stress on the system to check it's water production level. 
 
Water quality testing is not included in the inspection cost but can be lab analyzed for an additional fee and includes tests for arsenic and lead.  Arsenic is commonly found in water wells in SE Michigan and can be costly to remove from the entire home's water supply.  If you're buying a home with a well I highly suggest having the water tested.