Tax Lien Question - Please Help

[Bill Glick]

What type of taxes can make a property go to a tax lien sale? 

I recently reviewed a list from a local township, and it looks like more than real estate taxes are considered with regard to tax liens (e.g. water/sewer, public utilities).  

Can someone explain a little bit more about this?

Also, I understand the process as follows:

1) purchase lien

2) the township does the work to colllect the debt 

3) once debt is paid, I get paid the interest (pro-rated)

Is this correct? 

Thank you everyone!