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Air Pollution

Volume 205: debated on Tuesday 10 March 1992

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To ask the Secretary of State for Scotland if he will provide the most recent figures on air pollution levels in Scotland in each of the last five years.

[holding answer 6 March 1992]: The most recent published information on air

Table 1—Nitrogen Dioxide
Jan.Feb.MarchAprilMayJuneJulyAug.Sept.Oct.Nov.Dec.
(a) Glasgow
1987343835352830242324333538
1988313334383226222425313628
1989232325322424262024293538
1990192121303227242126263027
1991242929262625242127272630
(b) Strath Vaich—Ross and Cromarty
19901·90·90·6
19912·12·33·81·40·91·32·11·30·51·70·71·5

Note: All measurements expressed as parts per billion (ppb).

in each of the local enterprise company areas served by Scottish Enterprise and for Highlands and Islands and Scotland as a whole.

pollution can be found at section 3 of "The Scottish Environment—Statistics" Issue No. 2 (1989). The next issue will be published shortly.

Warren Spring Laboratory also compiles data on the atmospheric concentrations of a number of substances from a United Kingdom-wide network of monitoring stations. The available data from the Scottish sites are set out in tables 1 to 5. All data are expressed as average hourly readings for each month for the available years.

Table 2—Nitric Oxide

Jan.

Feb.

March

April

May

June

July

Aug.

Sept.

Oct.

Nov.

Dec.

(a) Glasgow

198784104382119252333338092122
19886838434734363029378610842
198924283646253131254838126195
199033272437433131264460157104
19918397653232353432477876135

(b) Strath Vaich

19900·10·10·1
19910·20·40·50·30·10·31·10·80·10·20·30·3

Note: All measurements are expressed as parts per billion (ppb).

Table 3—Carbon Monoxide

Jan.

Feb.

Mar

April

May

June

July

Aug.

Sept.

Oct.

Nov.

Dec.

Glasgow

19890·60·71·01·12·23·1
19900·90·80·70·80·90·80·70·70·91·22·51·8
19911·21·51·31·01·11·01·01·01·41·61·92·4

Note: All measurements expressed as parts per million.

Table 4—Sulphur Dioxide

Jan.

Feb.

Mar.

April

May

June

July

Aug.

Sept.

Oct.

Nov.

Dec.

Strath Vaich

19900·70·30·2
19911·41·71·20·60·10·20·50·2n·a.1·20·30·6

Note: All measurements expressed as parts per billion (ppb).

Table 5—Ozone

Jan

Feb

March

April

May

June

July

Aug

Sept

Oct

Nov

Dec

(a) Penicuik

1987161827363424232020171717
1988222928283730292526222228
1989293235333529282422241815
1990283436353129262223231924
1991202020282225272624202217

(b) Eskdalemuir

1987161921313021211915171718
1988202530263430282424221826
1989263034353431312523241819
1990263535353630282222231923
1991192525332727312827222215

(c) Strath Vaich

198741422934292930282628
1988283636374431322834323336
1989363833354233272528322827
1990303638404036302730312731
1991313232433934353227252520

Note: All measurements are expressed as parts per billion (ppb).