Tom Melhuish 4 min read

What is a Supply Point Identification Number?

Every business premises will have a supply point identification number (SPID) for their freshwater supply and/or sewerage supply, but sometimes it’s not easy to locate.

This guide will look at what a SPID number is, where to find it, and some frequently asked questions to help you out.

What is a Supply Point Identification Number?

The Supply Point Identification Number, also known as the SPID number, is a ten-digit code followed by a number used to locate your water supply by suppliers. It will look something like this:


All business premises have a SPID number, and it stays the same, even if you decide to switch water suppliers. The wholesale water network uses the supply point ID system to identify a non-house site that is using water.

When a new business premise is built or a household becomes a business (such as a holiday let), the property will be assigned a SPID and registered on the non-household wholesale water network.

Each business premises will generally have one SPID number for fresh water and another SPID number for sewerage to allow the removal of wastewater.

Where can I find my SPID number?

The easiest way to find your SPID will be from your latest water bill. You will usually find this on page 3, where the meter readings are shown and your volumetric charges calculated.

If you can’t locate a water bill, call up your current water supplier, and they’ll be able to tell you based upon your address.

A third option is to physically locate the water meter on your property, usually found on the exterior. On the water meter, you should see a water meter number, another unique identifier associated with your meter. If you give this meter number to your current water supplier, they should tell you the SPID to which it is associated.

Why do I have two SPID numbers?

You’ll have one SPID number for your freshwater supply that will be ten digits followed by the letter ‘W’ and two more digits. This is your freshwater supply SPID number.

The second number is for your sewerage. This will also be ten digits long, then an ‘S’ followed by one more digit and an ‘X’.

Will my SPID number ever change?

No. Your SPID number will never change. The only time you will have a different SPID number is if you decide to move business premises.

What is a SPID number used for?

Retailers and wholesalers use the SPID number to identify the supply of water that is specific to your business. It’s an integral part of the non-household water system identifying your business as a point where clean water is supplied and wastewater removed.

Against your SPID the wholesaler records the amount of water used, wastewater removed, and the rates of other business water charges.

If you are looking to switch business water suppliers, you would also need to provide your SPID number as part of the process to allow us to calculate an accurate business water quote.

Do I need a SPID number to switch my water supplier?

In short, you do. If you are struggling to find this information, we advise you to get in touch with your current supplier or follow the instructions above to locate it on your latest water bill.

However, you can submit an enquiry on our form without a SPID number and using your business address and name; we may be able to locate the SPID for you.

If we can’t, we will not be able to provide you with accurate quotes, and without a SPID, you will not be able to change your business water supplier. We advise the best route is to contact your water supplier directly.

Are you looking to switch water suppliers? Try our easy to use business water comparison service today!