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Estimates Only: This calculator provides estimates based on typical usage. Contact your water company for exact rates.
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Complete breakdown of UK water company rates and tariffs. Compare water supply and sewerage charges across all major water companies to understand your bills and potential savings.
| Water Company | Water Rate (£/m³) | Sewerage Rate (£/m³) | Standing Charge (£/year) | Annual Bill* | Customers |
|---|---|---|---|---|---|
Thames Water London & Thames Valley | £1.90 | £1.50 | £48 | £490 | 15.5 million |
United Utilities North West England | £1.82 | £1.42 | £45 | £466 | 7.4 million |
Severn Trent Midlands & Wales | £1.78 | £1.38 | £42 | £453 | 4.8 million |
Yorkshire Water Yorkshire & Humber | £1.85 | £1.45 | £47 | £476 | 5.2 million |
Anglian Water East England | £1.88 | £1.48 | £46 | £483 | 4.5 million |
Southern Water South East England | £1.92 | £1.52 | £49 | £496 | 4.7 million |
South West Water Devon & Cornwall | £1.95 | £1.55 | £52 | £507 | 1.8 million |
Wessex Water South West England | £1.87 | £1.47 | £46 | £480 | 1.4 million |
* Based on 130m³ annual usage (typical 3-person household). Rates effective 2025/26.
Higher costs due to challenging infrastructure and investment requirements.
Lower rates due to efficient operations and favorable geographic conditions.
Charged per cubic metre (m³) of water consumed. Covers treatment, pumping, and distribution costs.
Charged per m³ for wastewater treatment and disposal. Usually lower than water supply rate.
Fixed annual fee covering meter maintenance, customer service, and infrastructure costs.
Ofwat (Water Services Regulation Authority) sets price controls every 5 years through Asset Management Plans (AMPs). Companies must justify rate increases based on:
Water rates vary by region due to different operating conditions and investment requirements:
No, domestic customers cannot choose their water supplier - you're served by the regional monopoly. However, business customers using over 50ML annually can choose their retailer through the competitive market.
Major rate reviews happen every 5 years through Ofwat's Asset Management Plan process. Minor annual adjustments may occur for inflation (RPI) and exceptional circumstances, typically announced in autumn for the following April.
South West Water has unique challenges: long coastline requiring extensive sewage treatment, sparse population increasing per-customer costs, and aging Victorian infrastructure. They also have high environmental compliance costs for coastal protection.
Use our free calculators to estimate your water bills with accurate regional rates