Grass over the drainfield is bright green and squishy two days after rain Septic

Before the inspection, go find your toilets and check for a silent runner. Put a few drops of food colouring in the cistern, wait 20 minutes without flushing, and look in the bowl. One leaking flapper can push hundreds of gallons a day into a system that would otherwise be fine, and it's invisible until someone tells you to look.

Call now, but call for an inspection and a pump-out rather than an emergency. Greener grass over the trenches is normal to a degree because that's where the nutrients are. Squelching underfoot two days after the rain stopped is not, and that's the part I'd act on.

While you wait, do three things. Cut household water use hard for a week, so short showers and laundry spread over days rather than five loads on Saturday. Walk your gutters and downspouts and make sure none of them discharge anywhere near the field. And keep everything with wheels off it, including the mower if you can stand the long grass.

Also check where your water softener discharges, if you have one. Regeneration backwash going into the tank adds a lot of water and the brine doesn't do the bacteria any favours. Some counties are fine with it and some are not.

Unknown pump history with four people on a 1200 gallon tank means it's overdue regardless of what the field is doing. Get it pumped and ask the operator to look at the baffles and tell you how thick the scum and sludge layers were. That single conversation is the most useful thing you'll get all year, and it sets your interval going forward.

Worth adding, when the truck comes, ask them to open and photograph the distribution box. A tilted or clogged D-box sends everything to one trench and drowns it while the other three sit dry. It's a much cheaper fix than a new field and it looks identical from the lawn.