Explore The Northumbrian Water Market
Operating in Northumberland, Tyne & Wear, Durham or parts of North Yorkshire? Northumbrian Water Ltd delivers water and sewerage services across the region. Since 2017, non-household premises here can choose their business water supplier. That means competition and savings are now possible.
In fact, companies in your region could save up to 40% on water bills by switching suppliers through Tariff.com
At Northumbrian Water, water chargers are split into two parts: sewerage services and water supply. Here are some things to consider when it comes to water rates in Northumbria.
Metered: Your water usage will be based on meter readings and how many cubic metres of water you use.
Unmetered: If your premises doesn’t have a water meter, you’ll pay unmetered charges based on rateable value.
Surface Water Drainage: You’ll need to pay for the rainwater that is drained from your premises. This may be included as part of your sewerage charge.
Rising fixed charges from Northumbrian Water are pushing up bills, even for low-usage businesses. With Ofwat approving up to a 21% increase in household rates by 2029/30, many expect similar rises for commercial customers.
The situation is further complicated by six major suppliers, including Northumbrian Water, appealing Ofwat’s pricing decisions, fuelling uncertainty across the sector. As costs climb and regulatory tensions grow, more businesses are switching to secure better rates and greater billing transparency.
At Tariff.com, we help businesses reduce water costs through a combination of expert utility audits, full-market supplier comparisons, and ongoing support. Our team conducts detailed reviews of your usage and billing to identify inefficiencies or potential overcharges.
Since the non-household water market opened in 2017, we’ve been comparing all eligible suppliers, such as Scottish Water Business Stream, Castle Water, Severn Trent, and Thames Water, to find the most competitive rates for our clients. We also develop strategic water management plans tailored to your business, covering everything from metering options to usage optimisation.
Once we’ve identified the best deal, we handle the supplier switch and billing setup, giving your team more time to focus on running the business.
Tariff will scour the business energy market to find deals that work for you.
We’ll organise the whole switching process for you – minimum fuss, maximum results.
You’ll benefit from the massive savings that a new energy deal can bring.
Tariff.com helps your business take control of water usage. From site surveys to expert advice, we’ll help you save money, cut waste, and manage water more efficiently.
Yes, since the non-domestic water market opened in 2017, businesses in Northumbria (non-household premises) can choose their retail water supplier. While Northumbrian Water remains the wholesaler supplying the infrastructure, retailers handle billing and customer service.
Wholesale and retail water rates reset every April. In recent examples for Northumbrian Water, prices rose by around 13.6–17% depending on usage volume. While wholesale sewerage billing will reduce to 95% of water volume from April 2025, the unit charge has increased to balance the change.
Businesses that compare and switch suppliers can reduce their annual water bills by 5–10%, sometimes even more. Competition drives suppliers to offer better standing charges, volumetric rates, and account services such as usage monitoring, sustainability support, and consolidated billing for multi-site organisations.
No. Your physical water and sewerage supply remains unchanged. Only the retailer, the company managing your billing and customer support changes. Northumbrian Water continues as your wholesaler responsible for the network infrastructure
If your site has a water meter, charges are based on actual usage in cubic metres. Without a meter, charges are calculated using your property’s rateable value. Some businesses qualify for meter installation if that could reduce costs.
Once you decide to switch, Tariff.com manages the entire process, from contacting your new supplier to handling paperwork. We coordinate onboarding, agree on switch dates, and ensure billing continuity, all without disrupting your water service.
Tariff.com offers detailed water audits to uncover inefficiencies and compare quotes across multiple retailers. If switching is advantageous, we help you move seamlessly to the best tariff. We also help businesses assess metering opportunities, manage supplier relationships, and simplify billing across sites.
With the potential for to save up to 40% off your business water bill, there’s no reason to delay. Tariff.com will give you the expert guidance your business.
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