Really lush grass above your septic drain field?

Yes, to an extent, it can be normal for you to notice the grass above your drain field is slightly different from other areas of your lawn. However, if it is significantly more lush and green than the rest of your yard, it could indicate that the liquid in your tank is rising excessively. Some liquid is good and healthy, but too much can be a sign of trouble in your system. 

~The Doo Doo Guru