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South West Water

Parent Company:         Pennon Plc

Regulated utility:         South West Water Ltd

Ownership:                   Public Limited Company

Although one of the smallest water companies by area and population, South West Water has the longest and perhaps most beautiful coastline at 625 miles long. At the time of privatisation it had almost no coastal sewage treatment. Now after its 1.5 bn Clean Sweep investment programme nearly all sewage from the major coastal towns is treated.

The focus has moved beyong Clean Sweep to securing water supplies in the face of climate change; population growth; refurbishment of the early Clean Sweep plants; water mains replacement; smaller sewage treatment works and combined sewage overflows. South West Water has pioneered catchment management as a means to avoid pollutants entering its water supplies.

Through its vision of Pure Water, Pure Service and Pure Environment capital investment of 868m is planned in K6, 19% increase over the current regulatory period delivered through South West Water's H5O capital delivery model. This is an alliance with contractors Balfour Beatty and Interserve and consultants Pell Frischmann and Hyder.

The massive investment in sewage treatment has resulted in South West Water's customers having the highest bills in the UK despite the South West being relatively poor. South West Water delivered a class leading 11.7% return on regulated equity showing why water companies are so attractive to pension companies.

Financial data for regulated utility South West Water & Bournemouth Water

Data for financial year ended 31 March 2016

Turnover547 m
Operating Profit166 m
Capital Investment134 m

Area served 11 000 km
 -Waste water

1.6 m
1.57 m
-Water supplied a day
-Length water mains
-Water treatment works

364 Ml
15 015 km
-Length of sewers
-Waste water treatment works
-Sludge produced
-Number CSO's

9 098 km
63 000 te's dry


South West Water
Peninsula House
Rydon Lane

Tel: 01392 446 688

Web site:

Non-regulated business

All the non-regulated business in the Pennon group are grouped under Viridor Limited. The main business is:


One of the largest waste and renewable energy businesses in the UK. It has taken full advantage of the growth in green initiatives. Its core competencies are in landfill disposal, recycling and generation of electricity from landfill gas.

In addition Pennon has a small business in property management

Web site:


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