# Commission Implementing Decision (EU) 2020/1161 of 4 August 2020 establishing a watch list of substances for Union-wide monitoring in the field of water policy pursuant to Directive 2008/105/EC of the European Parliament and of the Council (notified under document number C(2020) 5205) (Text with EEA relevance), Annex: Watch list of substances for Union-wide monitoring as set out in Article 8b of Directive 2008/105/EC

Extent: E+W+S+N.I.

Chemical Abstracts Service.
European Union number.
To ensure comparability of results from different Member States, all substances shall be monitored in whole water samples.
Extraction methods:
LLE – liquid liquid extraction
SPE – solid-phase extraction
Analytical methods:
LC-MS-MS – Liquid chromatography (tandem) triple quadrupole mass spectrometry.
Sulfamethoxazole and trimethoprim shall be analysed together in the same samples but reported as individual concentrations.
Venlafaxine and O-desmethylvenlafaxine shall be analysed together in the same samples but reported as individual concentrations.
The azole compounds shall be analysed together in the same samples but reported as individual concentrations.
Name of substance/group of substances
CAS number
EU number
Indicative analytical method
Maximum acceptable method detection limit (ng/l)
Metaflumizone
139968-49-3
604-167-6
LLE-LC-MS-MS or SPE–LC-MS-MS
65
Amoxicillin
26787-78-0
248-003-8
SPE-LC-MS-MS
78
Ciprofloxacin
85721-33-1
617-751-0
SPE-LC-MS-MS
89
Sulfamethoxazole
723-46-6
211-963-3
SPE-LC-MS-MS
100
Trimethoprim
738-70-5
212-006-2
SPE-LC-MS-MS
100
Venlafaxine and
O-desmethylvenlafaxine
93413-69-5
93413-62-8
618-944-2
700-516-2
SPE-LC-MS-MS
6
Azole compounds
SPE-LC-MS-MS
Clotrimazole
Fluconazole
Imazalil
Ipconazole
Metconazole
Miconazole
Penconazole
Prochloraz
Tebuconazole
Tetraconazole
23593-75-1
86386-73-4
35554-44-0
125225-28-7
125116-23-6
22916-47-8
66246-88-6
67747-09-5
107534-96-3
112281-77-3
245-764-8
627-806-0
252-615-0
603-038-1
603-031-3
245-324-5
266-275-6
266-994-5
403-640-2
407-760-6
20
250
800
44
29
200
1 700
161
240
1 900
Dimoxystrobin
149961-52-4
604-712-8
SPE-LC-MS-MS
32
Famoxadone
131807-57-3
603-520-1
SPE-LC-MS-MS
8,5

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Source: https://www.legislation.gov.uk/eudn/2020/1161/annex (the official version)
Page: https://openlegislation.uk/eu-decision-2020-1161/annex
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.