Trade effluent charges 2015–16
A guidance leaflet for customers
Trade effluent fixed charges
Component charges
Administration (standing) charge
Category
Annual charge
Annual bill
£64.76
Quarterly or monthly bill
£533.31
Charge – pounds
per cubic metre
Treatment
component
Reception and conveyance
R
0.6116
Volumetric Primary or
Preliminary Biological
V
0.5123
Standing charges recover our customer service costs, such as
billing, cash collection and enquiry handling. We incur these
costs regardless of the volume of trade effluent you discharge.
Treatment
B
0.5819
Sludge Treatment
and Disposal
S
0.3809
Consent monitoring charge
Long Sea Outfall
M
0.0770
Category
Risk
Annual charge
1
Very low
£10
2
Low
£20
Type of effluent
COD mg/l
SS mg/l
3
Low to medium
£30
Sewage
452 (Os)
490 (Ss)
4
Medium
£40
Launderette
535 (Ot)
170 (St)
5
Medium to high
£50
Swimming pools
195 (Ot)
164 (St)
Vehicle wash – rotating
brush
173 (Ot)
110 (St)
Vehicle wash – jet wash
670 (Ot)
184 (St)
Small breweries
3,500 (Ot)
700 (St)
6
High
£60
7
Very high
£70
Trade effluent Mogden charge formula
Average effluent strengths
COD = Chemical Oxygen Demand (settled) SS = Suspended Solids (at pH7)
Southern Water charges for disposing of trade effluent by
relating the strength of the trade effluent to the average
strength of sewage across our operating region. The unit
charge for the trade effluent is calculated using the formula:
Unit Charge = R + V + Ot.B + St.S + M per cubic metre
Os
Ss
[
]
where R is a fixed charge per cubic metre
for reception and conveyance costs
V is a fixed charge per cubic metre for volumetric and
primary or preliminary costs, according to treatment
Ot is the measurement of the organic nature
of the trade effluent after one hour of quiescent
settlement (generally in terms of COD)
B is the biological treatment cost per cubic metre
of settled sewage of average strength
Os is the measurement of the organic nature of
settled foul sewage (measured on the same basis)
St is the total suspended solids of the trade
effluent at pH6.5-pH8.5
S is the sludge treatment and disposal cost per
cubic metre of crude sewage of average strength
Ss is the total suspended solids of crude
sewage of average strength
M is a fixed charge per cubic metre for costs
associated with discharge through a long sea outfall
The formula comprises five components. The components
applicable to a particular trade effluent will depend on
the treatment given to the effluent.
Where the ‘B’ or ‘S’ component applies, the comparative strength
of the trade effluent will affect the amount of the unit charge.
For more information, visit
southernwater.co.uk/trade-effluent
Effluent volume assessment
The volume of trade effluent for charging purposes will include
any water which has been used for washing down yards,
working areas and storage areas, rainfall from contaminated
areas and rainfall which is sampled along with the trade
effluent discharge.
Additional information
1. Metered wastewater charges may also be payable – see below
2. Charges shown do not include VAT where this is payable
3. There is a fee for new and amended consent applications of
£278.00 inc VAT.
4. Breaches in consent may result in additional charges.
Temporary licence/consent
The fee for a temporary licence/consent is £458. This cost
covers the initial application and approximately 200m3 of
effluent discharge, though this will be dependent on the nature
of the discharge. Discharges in excess of this volume may
be subject to additional charges based on the trade effluent
Mogden charge formula.
Metered wastewater charges
Metered wastewater charges are billed monthly, quarterly or
half-yearly depending on the frequency of meter reading.
They comprise two elements:
• A standing charge linked to the volume of sewage collected.
• A volumetric charge of £2.276 per cubic metre (standard
tariff) or £1.645 per cubic metre (large user tariff, under which
a fixed annual charge of £63,100 is also payable).
The volumetric charge contributes to the operating costs of
wastewater treatment and disposal, and is usually determined
by reference to 95 per cent of the volume of water supplied to
the premises.
Where a trade effluent consent has been issued in respect of
any trade premises for the discharge of trade effluent to a public
sewer, the chargeable wastewater volume will be 95 per cent of
the difference between the total volume of water supplied to the
premises and the volume of trade effluent discharged to the
public sewer, or an estimated or assessed volume.
Where no separate meter is provided for the measurement of
domestic wastewater volume, the volume may be assessed
as follows:
Type of employee or occupant
Allowance
litres/head/day
Employees (full time) including
temporary staff, agency staff
and contractors
– without canteen
25
– with canteen
40
Occupant (residential)
140
Employee (part time) including
representatives and drivers
– without canteen
12.5
– with canteen
27.5
How to contact us
If you would like any further information, please contact:
Southern Water Services Limited
PO Box 4056
Worthing
West Sussex
BN13 3XX
Telephone Trade Effluent Billing Enquiries:
0845 276 0845
Email miscinc@southernwater.co.uk
For technical trade effluent enquiries please contact your Trade
Effluent Inspector or email trade.effluent@southernwater.co.uk
If you require information on other services or charges,
please telephone:
Customer Service Centre
0845 272 0845
Monday to Friday 8am-7pm
Saturday 8.30am-2pm
For more information, visit
southernwater.co.uk/trade-effluent
3834_02.15 © Southern Water 2015
Standing charges recover our customer service costs, such as
billing, cash collection and enquiry handling. We incur these
costs regardless of the volume of sewage you discharge.