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Summary of sampling frequencies and windows specified in international agreements
Sampling frequency per year (unless indicated) | Sampling window | 1 | 35 | 81 | 109 | 113 | 114 | 125 | 126 | 127 |
2 weeks to every 3 years | Variable - Intensive between October and March | - | X | - | - | - | - | - | - | - |
1 | All year | - | - | - | X | - | - | - | - | - |
1 | August-September | X | - | - | - | - | - | - | - | - |
1 | Late winter-early spring | X | - | - | - | - | - | - | - | - |
1 | None | X | - | - | - | - | - | - | - | - |
1 | Seasonal | - | - | - | - | - | - | - | X | - |
1 | All year | X | ||||||||
1 | Research needed | X | - | - | - | - | - | - | - | - |
1 | Summer | X | - | - | - | - | - | - | - | - |
1-6 | Winter sampling | - | - | - | - | - | - | - | X | - |
12 | All year | - | - | - | X | X | X | - | - | - |
12 | Preferably in the morning | X | - | - | - | - | - | - | - | - |
12 | Summer (throughout the productive season) | X | - | - | - | - | - | - | - | - |
2 | All year | - | - | - | X | - | X | - | - | - |
4 | All year | - | - | - | - | - | X | - | - | - |
6 | Four seasons | X | - | - | - | - | - | - | - | - |
6 | Late summer-autumn | X | - | - | - | - | - | - | - | - |
6 | Winter | X | - | - | - | - | - | - | - | - |
6-12 | All year | - | - | - | - | - | X | X | - | - |
Continuously | All year | - | - | - | - | - | X | - | - | - |
Continuously | At the end of the first phase | - | - | - | - | - | X | - | - | - |
continuously | Since the implementation | - | - | - | - | - | X | - | - | - |
Every 2 years | Not specified | - | - | X | - | - | - | - | - | - |
Every 7-10 days | All year | - | - | - | - | - | X | - | - | - |
Not specified | All year | - | - | - | - | - | - | - | - | X |
Not specified | Not specified | X | - | - | - | - | - | - | - | - |
1 Baltic Sea (Helsinki) 1974/92
35 Mura 1954
81 North East Atlantic (OSPAR) 1992
109 Water Economy (Au/Hu) 1956
113 Danube (Bucharest) 1985
114 Technical Co-operation (Bu/Gr) 1991
125 Frontier waters (Au/Sl) 1970
126 North Sea (NSTF) 1987
127 Rhine (hydrology) 1989
For references, please go to https://www.eea.europa.eu/publications/92-9167-003-4/page020.html or scan the QR code.
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