Septic Tank - Sewage Treatment System - COSTS

Sewage Treatment Costs - There is a huge difference in the purchase prices and installation costs of different sewage systems as shown here:-

Cost of a CESSPOOL

Typical Costs for a single 3 bed house

Tank Cost = £3500 (35,000 litres)
Installation Cost = £6500
TOTAL COST = £10,000

Typical Maintenance Costs (Emptying only is required)

Average family of 4 persons x 200 litres per day = 800 litres per day volume discharged.
Min. tank capacity = 18,000 litres Storage capacity = 18000 / 800 = 22.5 days
Therefore tank will require emptying - 365 / 22.5 = 16.2 times per year
With an average emptying cost of around £180 per 4500 litres, a complete emptying of 18000 litres will cost £720, 16 times a year
Average annual cost = £11,520 per year

Cost of a SEPTIC TANK

Typical Costs for a single house

Tank Cost = £790 (larger tanks cost more)
Installation Cost = £1500
Soakaway system (assuming 100 metres of drains) = £5200
TOTAL COST = £7490.00

Typical Maintenance Costs

Emptying once per year = £150 per year
Percentage cost of replacement soakaway (every 10 years average ) =£520
Average annual cost = £670.00

If a septic tank and land drainage system are unable to treat the sewage, then one of the following sewage treatment systems must be used to remove a substantial amount of the pollution contained in the wastewater and protect our environment.

Cost of a TRADITIONAL SEWAGE TREATMENT PLANT

Typical Costs for a single house

Plant Cost = £2000 to £3200
Installation Cost = £2000 to £3000+ (depending on the model.)
Land drainage system (assuming 100 metres of drains) = £5200 or £200 typical cost if to a ditch with a 10 metre pipe run
TOTAL COST = £4200 to £11,400+

Typical Maintenance Costs

Emptying (either annually or 6 monthly, depending on the model) £180 to £360 per year
Power consumption = £150 per year
Maintenance Service = £130 to £375 (depending on unit chosen )per year
Average annual cost = £460 to £885 per year

Cost of a MODERN extended aeration SEWAGE TREATMENT PLANT

Typical Costs for a single house

Plant Cost = £2200 to £2400
Installation cost = £600 to £1900
Drainage system to Ditch = £20.00/metre of drain run
TOTAL COST £2800 to £4300

Typical Maintenance Costs

Emptying once every 4 years = £33.00/year
Power consumption = £150.00
Maintenance Service = £150
Average annual cost = £333.00 per year

Cost of a FILTER SEWAGE TREATMENT PLANT

Typical Costs for a single house start at

Plant Cost = £2441
Installation cost = £1000 to £1900
Drainage system to Ditch = £20.00/metre of drain run
TOTAL COST £3441 to £4341

Typical Maintenance Costs

Emptying once every 4 years = £33.00/year
Power consumption = £0
Maintenance Service = £75.00
Average annual cost = £108.00 per year

Cost of REED BED sewage treatment

Typical Installation Costs

Septic tank installed price £2250
Total supply and Installation Cost = £ 8500 (including power supply etc.)
Land drainage system (assuming 100 metres of drains) = £ 5200 (or this may be a reduced cost if using an outfall pipe to a stream if the reed bed is used as a tertiary treatment after a sewage treatment plant)
TOTAL COST = £15,950 (Note - there may be a cost for the larger area of land required)

Typical Maintenance Costs

Emptying of tank once per year = £180 per year
Power consumption of the pumps = £290 per year
Maintenance = reed harvesting/composting/replanting (4 days work) = £450
TOTAL COST = £820 per year

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