# The Sludge (Use in Agriculture) Regulations 1989, Paragraph 5

Extent: E+W+S

For the purposes of regulation 3(4), the specified limit of concentration of elements in any representative sample, expressed in milligrams per kilogram of dry matter, is set out in the soil table below.
SOIL TABLE
(1)
(2)
Element
Limit According to pH of soil
5.0<5.5
5.5<6.0
6.0–7.0
>7.0
Zinc
200
250
300
450
Copper
80
100
135
200
Nickel
50
60
75
110
For pH 5.0 and above
Lead
300
Cadmium
3
Mercury
1

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Source: https://www.legislation.gov.uk/uksi/1989/1263/schedule/2/paragraph/5 (the official version)
Page: https://openlegislation.uk/sludge-use-in-agriculture-regulations-1989/schedule-2/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.