Extension of the UK Air Quality
Classification Scheme: Scoping of Options
UKPIR03
February 2006
EXECUTIVE SUMMARY
Background to research
In recent years, air quality has become an increasingly important issue
at local, national and European Union levels of environmental policy.
This has primarily occurred as a result of increasingly focused efforts
to reduce the adverse impacts of air quality on human health.
However, in addition to considering human health outcomes relating to
air quality and exposure at a national scale with which the existing
headline indicator is largely concerned, the UK environment Agencies
also have mandates in other areas i.e. to protect the environment which
includes ecosystems, and civil amenities. The aim of this study was
therefore to provide an initial scoping investigation for extending the
UK’s existing air quality classification scheme in two main
respects. The first was to assess the potential for extending the
scheme such that it also addresses the impacts of air quality on the
other issues covered by the mandate of the UK environment Agencies
(i.e. ecosystems and civil amenities). Such an extension of the
existing scheme to integrate ecosystem, amenity and other human health
measures would be a new adaptation/application to the management and
reporting of air quality. The second aspect of the work was to assess
the utility of extending the existing national-based scheme for use by
local and regional bodies (e.g. Devolved Administrations).
Objectives of research
The objective of this scoping study has been to investigate the
potential for extension of the UK’s air quality
classification scheme. Specifically, the study has consulted
with stakeholders to investigate the perceived need and feasibility of
extending the current classification scheme
a) to include parameters that also provide information on the impacts
of air quality on the ecosystem and amenities; and b) so that it is
more suitable for use by local and regional bodies.
Key findings and
recommendations
A stakeholder consultation exercise was initially performed to clarify
the perceived need for, and requirements of, any extended air quality
classification scheme. All stakeholders contacted expressed the
preference to extend the existing indicator classification of air
quality to some degree to include additional parameters that reflect
the various other impacts of air quality. Many saw the provision of a
parameter for eco-system impacts of air quality as a priority.
The feedback received from the consultation exercise provided a clear
justification for proposing an extension to the current air quality
classification scheme. Proposed options for extending the
present air quality classification scheme were developed:
- Three separate classification schemes for each of the air
quality issues human health, eco-systems and amenities;
- An overall classification framework that provides a single
classification of air quality based on three underlying classification
schemes (human health, eco-systems and amenities).
The majority of stakeholders questioned were in favour of keeping the
air pollution issues entirely separate i.e. option 1. A main concern
was that the current classification scheme (i.e. the human-health based
system) should not be confused or diluted by the incorporation of other
issues into it. In contrast a benefit of the proposed option 2 is that
the existing classification system would be retained but as input to a
system that would provide a single overall classification of air
quality impacts that may help present a single message concerning air
quality to the public.
This scoping study has also identified several potential additional
classification system parameters for human health, ecosystems and
amenities. The potential options for air quality classification
parameters were discussed at a workshop held in late June 2005 and many
of the various comments and viewpoints received have been incorporated
into this report where applicable. Reflecting the feedback received
during the study, it is recommended that the existing air quality
classification system, which is primarily concerned with short-term
human health impacts, is maintained in any new extended classification
system. In terms of the additional proposed classification systems, an
emphasis has been made throughout that they should be both as
operationally robust as possible and should meet the aim of being able
to measure and communicate progress in improving air quality. This
should therefore ultimately help reduce exposure to humans and
eco-systems, and reduce air quality-related impacts on amenities. It
should also help government bodies track their progress and performance
in improving and maintaining the quality of air for which they are
responsible. A number of specific recommendations pertaining to the
proposed potential additional classification systems have been made.
These relate to, for example, suggested improvements in data
acquisition and classification methodologies.
A key message received from the stakeholders consulted during this work
is that it is felt for reasons of multi-causality etc, that there
remains a general difficulty in quantifying the specific adverse
impacts on human health that can be specifically ascribed to poor air
quality. For this reason, no measure of actual human-health impacts
caused by poor air quality per se has been suggested, rather the
proposed potential classification parameters for human health focus
more upon optimising air quality to reduce exposure i.e. optimising the
physical environment. From this, it is assumed the reduction in
exposure will flow through to improvements in human health (but
improvements which are not themselves easily quantifiable for the
purposes of an air quality classification system).
Based on the feedback concerning future priorities received from both
the stakeholder questionnaire and project workshop, it is recommended
that given future resources for such work, tasks should in the first
instance focus on further development and refinement of an eco-system
classification system.
Key words: air-quality, amenity, classification, eco-system,
environment, health, indicators.
Copies of this report are available from the Foundation, in electronic
format on CDRom at £20.00 + VAT or hard copy at
£25.00, less 20% to FWR members.
N.B.
The report is available for download from the SNIFFER Website