As regards EC regulations, the tendencies for a development are in the same direction as in Swedish
legislation. For instance, the sewage sludge directive is subject to revision, which will probably lead
to more restrictive legislation in that area. Furthermore, the Commission has adopted a policy,
which aims at increasing the protection of soil against pollution. Overall, the legal prerequisites for
changing system structures into reality are fairly unproblematic. However, the final design must
make the systems meet the specific technical requirements that are found in some parts of the
legislation. In particular, the treatment processes must be sufficiently effective and the methods
chosen must also have the economic capability for adjustment to future demands. In the separating
systems, the idea of using untreated human urine in agriculture may be problematic.