How Much Does South West Water Cost in the UK?
South West Water charges the average household around £35 per month for water and sewerage services. South West Water supplies approximately 1.8 million people across Devon, Cornwall, and parts of Dorset and Somerset. It is part of the Pennon Group. Water prices are regulated by Ofwat and you cannot switch your water supplier.
| Service | Typical Monthly Cost | Billing Method |
|---|---|---|
| Unmetered (rateable value) | £35–£48 | Fixed annual charge |
| Metered | £28–£38 | Based on actual usage |
| WaterCare tariff (social tariff) | £18–£22 | For eligible low-income households |
South West Water has historically had some of the highest water bills in England, largely due to the extensive coastline and the investment needed to meet EU Bathing Water standards. The government introduced a £50 annual reduction through the WaterShare+ scheme to help offset higher costs. According to Water UK, the average UK water bill was £448 per year in 2025-26.
For a full comparison of UK utility costs, see our guide to UK Utilities subscriptions.
Does South West Water Auto-Renew?
Yes, South West Water charges continue automatically. Direct debit customers have payments taken monthly, with the annual charge divided into 12 equal instalments. Charges are reviewed each April in line with Ofwat's price review determinations.
Metered customers are billed based on actual water usage, with meters typically read every six months. Unmetered customers pay a fixed annual charge based on rateable value. South West Water sends annual billing notifications before new charges take effect.
The WaterShare+ scheme provides an annual £50 credit that appears automatically on your bill.
How to Cancel South West Water
You cannot cancel or switch your water supplier. Water supply in England is a regional monopoly — South West Water is the only provider for Devon, Cornwall, and parts of the South West. You can take steps to reduce your bill.
Options to lower your South West Water bill
- Request a water meter — free installation, often reduces bills for smaller households
- WaterCare tariff — social tariff offering reduced charges for low-income customers
- WaterSure — caps metered bills for qualifying households
- WaterShare+ credit — automatic £50 annual reduction on all bills
- Freshstart fund — helps clear water debt for qualifying customers
If you are moving out of the South West Water supply area, contact them with your move date to receive a final bill.
For other water suppliers, see our guides to Southern Water and Welsh Water.
Is South West Water Worth It in 2026?
South West Water is your only option in Devon, Cornwall, and surrounding areas. While bills have historically been higher than average, the WaterShare+ scheme and social tariffs help offset costs for many customers.
| Pros | Cons |
|---|---|
| WaterShare+ gives £50 annual credit to all customers | Historically higher bills than national average |
| WaterCare social tariff for low-income households | Cannot switch to another supplier |
| Investment in bathing water quality improvements | Higher charges due to coastline infrastructure |
| Free water meter installation | Annual price increases set by Ofwat |
| Freshstart fund helps clear water debt | Customer satisfaction has been mixed |
South West Water's WaterShare+ scheme, which provides a £50 annual bill reduction, was introduced to address the historically higher bills in the region. The company's investment in coastal water quality has significantly improved bathing water standards across Devon and Cornwall.
Track Your South West Water Subscription with Prunely
Prunely lets you add your South West Water bill to see exactly when your next payment falls. Set custom reminders so you get an alert before you are charged. Track your water costs alongside all your other subscriptions — energy, broadband, insurance, and more — without connecting a bank account. Prunely is free for up to 5 subscriptions.
Frequently Asked Questions
How much does South West Water cost per month?
South West Water charges the average household around £35 per month for water and sewerage. This is slightly above the national average due to the region's extensive coastline infrastructure. All customers receive a £50 annual WaterShare+ credit automatically.
Why are South West Water bills higher than average?
South West Water's bills have been historically higher because the South West region has a long coastline requiring significant investment in sewage treatment to meet EU Bathing Water standards. The government introduced the £50 WaterShare+ annual credit to help reduce bills in the region.
Can I switch from South West Water to another company?
No, water supply is a regional monopoly in England. South West Water is the only provider for Devon, Cornwall, and parts of Dorset and Somerset. You cannot choose an alternative water company. If you move to another region, your local water company takes over.
What is the WaterShare+ scheme?
WaterShare+ provides a £50 annual credit that is automatically applied to all South West Water customer bills. It was introduced by the government to help offset the historically higher water bills in the South West region. The credit appears on your bill without you needing to apply.
How do I track my South West Water spending?
Add your South West Water direct debit to Prunely to track payments alongside all your other subscriptions. You can also manage your account at southwestwater.co.uk, where you can submit meter readings, view bills, and apply for financial support tariffs.