Need new septic system, but there are tenants

[Sarah Moncivaiz]

I just found out that we are going to need to replace our entire septic system, including drain field because the county will not allow us to fix gravity systems at all. I'm told that this could take 3-6 months in total. Our tenants are in a lease until the end of July. What are my options in getting them out of the house? What do the laws say when there is an extenuating emergency such as this?