About Trade Effluent Calculator
Joe, who reads the water companies' own charges schemes and builds them into a calculator, each figure dated.
Why this site exists
Each water company publishes its Mogden figures deep in a long charges PDF, with different standard strengths. A calculator on those exact figures lets a business see its bill, and what cutting COD or solids would save, in a minute.
Who it is for
Food producers, manufacturers, laundries and other businesses in England and Wales checking what their trade effluent costs and what changes it.
What is on this site
One question, "trade effluent calculator", answered with a calculator that works on the page with no account, 2 guides on the questions around it, a data table you can cite (the figures and their method), and the sources every figure rests on.
- Trade effluent charges 2026/27: Mogden figures by water company: The 2026/27 Mogden figures, R, V, B and S per cubic metre with each standard strength, for Severn Trent, Hafren Dyfrdwy, Yorkshire Water and Wessex Water.
- The Mogden formula explained: how a trade effluent bill is built: The Mogden formula term by term, R, V, B, S, Ot, Os, St and Ss, with a worked example at Severn Trent's 2026/27 figures and what lowers the charge.
What it does not do
- We do not give legal or engineering advice.
- We do not pass your enquiry to any firm.
- We do not use a figure we have not read from the water company's own scheme.
Who answers for it
Joseph Ellul-Turner, Director.
Reach us
Contact for a question about the site, or enquiries@tradeeffluentcalculator.co.uk. The legal terms are on Terms and Privacy.
This calculator applies water companies' published 2026/27 Mogden figures to what you enter; it is not legal or engineering advice, and your retailer's bill is the figure you pay. An enquiry sent through the form is read and answered by Joe, who runs this site; no firm receives it.