WATER EFFICIENCY
47. Household demand makes up most (62%) of potable
water demand in the UK. Anna Walker found that while per capita
consumption (currently averaging 148 litres per person per day)
has remained relatively steady over the last decade and is low
in comparison to Mediterranean countries, it is "higher than
in other European countries with a similar climate".[90]
Demand per capita is expected to fall, but this will be more than
offset by the expected 10 million increase in England's population
by 2031; and the trend towards smaller households, which have
higher per capita usage.[91]
The Environment Agency predicts that by 2020 demand could increase
by 5%.[92]
48. Water companies currently have a duty to promote
the efficient use of water. However, they spend less than 1% of
total expenditure on water efficiency and the Walker interim review
concluded that the effect has been "equally small".[93]
Ms Walker told us that the regulatory system as a whole
needed to incentivise companies and customers to "think about
using water carefully and economically".[94]
49. Ofwat has now introduced water efficiency targets
on a trial basis for this financial year, but they will be mandatory
from 2010-15.[95] However,
the targets are not stretching in comparison to achievements elsewhere
in Europe. In Germany, for example, per capita consumption was
already at 129 litres per day in 1998the target at which
the UK is aiming today.[96]
50. Waterwise, an NGO promoting water efficiency,
hoped for a "significant step change in the scale and number"
of the water efficiency schemes proposed in the water companies'
PR 09 business plans and funded by the final price settlement.
It considered that PR 04 lacked firm evidence on the costs and
benefits of larger scale water efficiency programmes.[97]
The Environmental Industries Commission, a trade association for
the environmental technology and services industry, believed that
better regulatory incentives were needed for companies to invest
in water efficiency, and other environmental improvements.[98]
Northumbria Water agreed with this and called for more positive
incentives since the current approach was too focussed on targets
and penalties rather than rewards. It considered that incentives
currently in place mainly related to "reducing costs"
and did not "adequately address important issues such as
climate change and sustainability".[99]
South East Water wanted to see "changes of behaviour and
investment in water efficiency of buildings" as well as water
efficient devices and customer information, but did not consider
that retail competition would in itself promote water efficiency.[100]
51. Regina Finn, Chief Executive of Ofwat, emphasised
that water efficiency was a key area since the challenge in the
longer term is how "ensure that both the industry and customers
properly value this really essential life resource" and establish
incentives for the "right behaviours".[101]
Ofwat consider that the industry has no incentive to increase
the volume of water sold because, under the 'Revenue Correction
Mechanism' a water company would forfeit any additional revenue
resulting from those sales.[102]
52. Waterwise noted the specific problem of water
efficiency retro-fit programmes being classified as operating
expenditure, rather than capital expenditure, which meant that
water companies had an incentive to deliver "large scale
supply-side schemes" as these could increase regulatory asset
value and hence potential gains.[103]
The NGO referred to the Cave interim report's conclusion that
water companies were "unadventurous with regard to tackling
environmental problems" and focused on "pouring concrete".[104]
53. Witnesses provided us with ideas for a range
of water efficiency approaches, including a scrappage scheme to
enable householders to replace inefficient water appliances, such
as washing machines, dishwashers and showers, with more efficient
equipment.[105] Unison
believed this could cut water consumption by 50%, with a consequent
reduction in need for infrastructure investment, helping to keep
customers' bills down.[106]
A number of witnesses considered that metering could help to cut
consumption since it helped to put a value on water more explicitly
and we examine this in more detail below.
54. Anna Walker linked affordability and water efficiency
in her interim report published in June 2009. She recommended
that companies be required to develop their own water efficiency
programmes, which would contribute to their enforceable water
efficiency target, with priority given to low income customers
in debt or in receipt of Council Tax Benefit.[107]
55. There are clear parallels with approaches for
improving energy efficiency levels, although there are differences
between the sectors; for example the size of water bills is lower
and arguably this lessens the incentive to reduce usage. Anna
Walker told us that the water industry is "behind the energy
industry" in terms of providing information and education
to customers on efficiency and "more thought needs to be
given to water efficiency".[108]
We recommended in our report
on Energy efficiency and fuel poverty published
earlier this year that energy efficiency targets be set for existing
homes, delivered through an area-based approach, focusing first
on the areas of most need.[109]
Funding for this would come from Government schemes such as Warm
Front as well as the Carbon Emissions Reduction Target (CERT)
activity funded by energy supply companies.[110]
This is a model whose merits
could usefully be considered for the water industry.
Analysis of the full range of water efficiency technologies available
is outside the scope of this report, but there is evidence that
businesses and households have further opportunities to reduce
water usage.[111]
56. We are not
convinced that the mechanisms in the price review are sufficient
to promote the increases in water efficiency necessary to ensure
that water demand can continue to be met in periods of water scarcity.
We consider that there are models from the energy sector that
could usefully be adapted for water supply and Ofwat should assess
how best practice in achieving improvements in energy efficiency
can be applied to the water sector. We recommend that Ofwat and
Defra explore more extensive water efficiency obligations, either
by placing limits on volumes sold or a (CERT style) measures based
approach. Ofwat should benchmark the performance of the UK industry
in delivering sustainable water management on an international
basis.
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