For a home in Exeter, South West Water is the main regional benchmark. Its forecast 2026/27 household average is £740 a year.
South West Water serves most of Devon and Cornwall. Water-company boundaries can cross postcode areas and clean water may come from a different company than wastewater.
Monthly and weekly equivalent
The annual company average works out to £61.67 a month or £14.23 a week. Your payment plan may collect over ten rather than twelve months, so instalments can differ.
Household-size examples
These planning estimates adjust the South West Water company benchmark for typical occupancy. They are not tariff quotes.
| Household | Annual estimate | Monthly |
|---|---|---|
| 1 person | £463 | £38.58 |
| 2 people | £667 | £55.58 |
| 4 people | £1,003 | £83.58 |
Coverage around Exeter
South West Water is associated with postcode areas including EX, PL, TQ, TR. This is only a regional guide: postcode areas can contain more than one appointed company, and wastewater may be billed separately.
What changes a Exeter bill?
- A metered home pays for measured use plus fixed charges.
- An unmetered home normally pays according to historic rateable value.
- Occupancy and habits strongly affect metered consumption.
- Support tariffs and WaterSure can reduce eligible bills.
Use a localised estimate
Select South West Water in the calculator, add your household size and choose a realistic usage level. Treat the output as a planning range, then compare it with the tariff details on your bill.