average cost of septic tank
Average Septic Tank Cleaning Cost. Average septic tank cleaning cost is $200 to $300 for a septic tank as large as 1,000 gallons. Prices can go up to $800 for a large, 2,500 gallon tank.There may be an additional $200 to $400 charge if the contractor has to find the septic tank and locate the opening, depending on the amount of labor involved.verage Septic Tank Cleaning Cost. Average septic tank cleaning cost is $200 to $300 for a septic tank as large as 1,000 gallons. Prices can go up to $800 for a large, 2,500 gallon tank.