Why are billed amounts for clean and waste water the same?

Biscuit_Tin

brocq_18 said:

Why are billed amounts for clean and waste water the same?

Volume used is 19m3, so why is 19.00 charged for both clean and waste? Shouldn't it be a combination of two values totalling 19m3?

Well the billed amounts are obviously different; just under £40 for clean water and just over £60 for waste water.

Only your water supply is metered.Your waste is not metered.
Waste water is billed based upon the supply meter.

brocq_18

Cardew said:

Apparently the 5% or 7.5% reduction in charges to allow for evaporation, garden watering etc is done by reducing the per cubic metre sewerage charge.

E.G. take a customer being supplied with, say, 100 cubic metres(m3) of water from the mains, and the water company allowing 5% for evaporation etc. The full charge for sewerage is £2 per m3.

They can either.

1. Charge £2 on 95m3 = £190 -

or

2. Charge £1.90 on 100m3 = £190

In the early days of metering method 1 was used on bills, but for years now method 2 has been used by my water company.

So the OP's charge of £0.8672 per m3 is after it has been reduced by 5% or 7.5% (or whatever figure Thames Water use.

Wow, this makes sense. I called them a few months back and they couldn't give me a valid reason other than just. Thanks