# The Environmental Authorisations (Scotland) Regulations 2018, Paragraph 23


Emission limit values for discharges of wastewater from the cleaning of waste gases are as provided for in Table 9—
Table 9
Polluting Substances
Emission limit values for unfiltered samples (mg/l except for dioxins and furans)
1. Total suspended solids as defined in
Annex I of Directive 91/271/EEC concerning urban wastewater treatment
95%
100%
30
45
2. Mercury and its compounds, expressed
as mercury (Hg)
0.03
3. Cadmium and its compounds,
expressed as cadmium (Cd)
0.05
4. Thallium and its compounds,
expressed as thallium (Tl)
0.05
5. Arsenic and its compounds, expressed
as arsenic (As)
0.15
6. Lead and its compounds, expressed as
lead (Pb)
0.2
7. Chromium and its compounds,
expressed as chromium (Cr)
0.5
8. Copper and its compounds, expressed
as copper (Cu)
0.5
9. Nickel and its compounds, expressed
as nickel (Ni)
0.5
10. Zinc and its compounds, expressed as
zinc (Zn)
1.5
11. Dioxins and furans
0.3 ng/l

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Source: https://www.legislation.gov.uk/ssi/2018/219/schedule/22/paragraph/23 (the official version)
Page: https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-22/paragraph-23
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.