# The Environmental Protection (Prescribed Processes and Substances) Regulations 1991, Schedule 5: RELEASE INTO WATER: PRESCRIBED SUBSTANCES


(1)
(2)
Substance
Amount in excess of background quantity released in any 12 month period (Grammes)
*Where both Atrazine and Simazine are released, the figure in aggregate is 350 grammes.
Mercury and its compounds
200 (expressed as metal)
Cadmium and its compounds
1000 (expressed as metal)
All isomers of hexachlorocyclohexane
20
All isomers of DDT
5
Pentachlorophenol and its compounds
350 (expressed as PCP)
Hexachlorobenzene
5
Hexachlorobutadiene
20
Aldrin
2
Dieldrin
2
Endrin
1
Polychlorinated Biphenyls
1
Dichlorvos
0.2
1,2-Dichloroethane
2000
All isomers of trichlorobenzene
75
Atrazine
350
Simazine
350
Tributyltin compounds
4 (expressed as TBT)
Triphenyltin compounds
4 (expressed as TPT)
Trifluralin
20
Fenitrothion
2
Azinphos-methyl
2
Malathion
2
Endosulfan
0.5

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Source: https://www.legislation.gov.uk/uksi/1991/472/schedule/5 (the official version)
Page: https://openlegislation.uk/environmental-protection-prescribed-processes-and-substances-regulations-1991/schedule-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.