Business water for manufacturing

For most manufacturers, water is the cost line nobody owns. Energy gets a procurement review. Materials get a procurement review. Water shows up on the invoice and gets paid. By the time anyone looks at it properly, the trade effluent consent has been static for years, the volume tier hasn’t been renegotiated since the last expansion, and nobody on the ops team is sure whether the abstraction licence has been factored in correctly.

Manufacturing water sits in a different category from typical commercial accounts. The retail switch matters and it’s worth doing. But it’s rarely the biggest lever on the bill. Volume-tier negotiation, trade effluent recalculation under the Mogden formula and discharge consent reviews are where the larger numbers usually sit.

This page covers how we help UK manufacturers review their water arrangements. The mechanics of switching retailer are covered in our main business water switching guide. Our business water service covers the open UK market across every commercial sector.

How we help manufacturing businesses

A manufacturing water review has more moving parts than a typical commercial review. We start with the bill stack. Usually multiple meters across one or more sites. And pull every SPID into a single view. From there we work through the retail margin, the standing charges, the volume-tier banding, the trade effluent consent and any related surface water drainage assessments.

The retail side is the easiest part. Comparing licensed retailers in your wholesaler region is fast and the switch process is administrative rather than physical. The slower work, and usually the more valuable work, is on the wastewater side. Trade effluent consents drift over time. Volume-tier rates were often agreed years ago and need revisiting when production volumes have moved. Abstraction licences from the Environment Agency sit outside the retail market entirely, but they intersect with how the rest of the bill should be structured.

Why manufacturing water bills are different

Trade effluent and the Mogden formula

Wastewater from a manufacturing process is charged using the Mogden formula. The wholesaler sets a base figure for each of three components: organic load (chemical oxygen demand), suspended solids and volume. Your trade effluent charge is then calculated against the values in your consent.

The thing nobody flags is that those values rarely get updated. A consent issued when the plant ran one production line a decade ago is still active when the plant now runs three. Or vice versa. The values lag. The charge often doesn’t match the actual operation. Recalculating Mogden values against current discharge profiles can release meaningful reductions.

We work with the wholesaler to review the consent, sample the discharge if needed and rebuild the numbers against current operations. It’s slower than a standard retail switch. Usually three to six months end-to-end. But the values being recalculated are typically larger.

Volume tiers and when high consumption isn’t paying off

Most retailers offer banded pricing above certain consumption thresholds. The unit rate falls as volume increases, in a step pattern. The thresholds are usually set at the start of the contract and don’t move with operations.

If your throughput has gone up since the last contract renewal, you may be sitting at the top of a band rather than the bottom of the next one. A small renegotiation of the threshold position can produce a unit-rate change applied across the entire volume. For high-consumption sites, this is often worth more than the retail switch on its own.

Process water, cooling and recovery

Process water is metered separately on many manufacturing sites. Cooling towers, washing lines, dilution water for chemicals or food. Recovery systems can return condensate to the boiler, treat and reuse cooling water, or capture rainwater for non-process uses.

We don’t engineer recovery systems. We’re a procurement specialist, not a process consultancy. But we’ll flag where the retail bill is showing signs that a recovery investment might be worth assessing, and we’ll cross-link to the engineering specialists who handle that side. The point is that the bill should reflect what the operation is actually doing.

Abstraction licences sit outside the retail market

If your site abstracts water from a borehole, river or reservoir, the licence is held with the Environment Agency. Abstracted water isn’t subject to the retail water market and doesn’t appear on a retailer’s invoice. The discharge of that water, however, may still be subject to trade effluent or wastewater charges.

We don’t renew abstraction licences. The Environment Agency handles that side. But we’ll help you understand which of your water sources sits inside the retail procurement review and which doesn’t.

How a manufacturing water review works

Manufacturing water terms worth knowing

Mogden formula

The pricing formula wholesalers use for trade effluent. Three components: volume, COD (chemical oxygen demand) and suspended solids.

Trade effluent consent

The legal permission from the wholesaler to discharge industrial wastewater into the public sewer.

Volume tier

A banded pricing structure where unit rate steps down once consumption crosses defined thresholds.

Abstraction licence

An Environment Agency licence to take water from a borehole, river or reservoir. Sits outside the retail market.

Discharge consent

Authorisation to discharge process water to surface water or controlled waters. Separate from trade effluent consent.

SPID

Supply Point Identification number. One per meter. Sits on every water bill.