The conclusion when analysing table is that it does not make much sense to include dioxins (PCDD/F), PCBs and PAHs in routine monitoring programmes but occasionally it may be motivated with respect to the origin of the sludge. The same applies to TBT, which is indeed very toxic, but at the same time is almost non-existing in sludges because of a use (antifouling) in other contexts. There are environmental reasons for monitoring sludges for detergents like LAS and nonylphenoles because they are high volume chemicals with an extensive household and industrial use. They are also more water soluble than.