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Summary of sampling frequencies specified in directives
| Sampling Frequency | 2 | 3 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 16 | 17 | 18 | 19 | 25 | 26 | 27 | 46 |
| Once | - | - | - | - | - | - | - | - | - | - | x | - | - | - | - | - | - | - |
| Every four years | - | - | - | - | - | - | - | - | - | - | - | - | x | - | - | - | - | - |
| 1 per year | x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | x |
| 2 per year | x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Every six months | - | - | - | - | - | - | - | - | - | - | - | - | - | - | x | - | - | - |
| Half yearly | - | - | - | - | - | - | - | - | - | - | - | - | - | x | - | - | - | - |
| 3 per year | x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | x |
| 4 per year | x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Quarterly | - | - | - | - | - | - | - | - | - | - | - | - | - | x | - | - | - | - |
| 6 per year | x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 8 per year | x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 12 per year | x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Monthly | - | - | - | - | - | - | - | - | - | x | - | - | x | x | - | x | - | - |
| Fortnightly | - | x | - | - | - | - | - | - | - | - | - | - | - | - | - | x | - | - |
| Weekly | - | - | - | - | - | - | - | - | - | x | - | - | - | - | - | - | - | - |
| Not specified | x | x | x | x | - | - | x | x | x | x | - | x | - | x | - | x | x | - |
| Regular intervals | - | - | - | - | - | - | - | - | - | - | - | - | x | - | - | - | - | - |
| See comments | - | x | x | - | x | x | x | - | - | - | - | - | - | - | - | - | - | - |
Notes:
2. Sampling and Analysis (79/869/EEC)
3. Bathing Water (76/160/EEC)
5. Mercury (82/176/EEC)
6. Mercury (84/156/EEC)
7. Cadmium (83/513/EEC)
8. Hexachlorocyclohexane (84/491/EEC)
9. Carbon tetrachloride (86/280/EEC)
10. Aldrin etc. (88/347/EEC)
11. Dichloroethane (90/415/EEC)
12. Freshwater Fish (78/659/EEC)
13. Exchange of Information Decision 77/795/EEC and 86/574/EEC)
16. Drinking Water (80/778/EEC)
17. Urban Waste Water Treatment (91/271/EEC)
18. Nitrates (91/271/EEC)
19. Shellfish Waters (79/923/EEC)
25. Proposal on landfills (COM (93)
26. Proposal on Bathing Water (COM (94) 36275 final) final).
27. Proposal for Directive on ecological quality of surface waters (COM (93) 680 final)
46. Titanium Dioxide (82/883/EEC)
For references, please go to https://www.eea.europa.eu/publications/92-9167-003-4/page019.html or scan the QR code.
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