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Salvati et al. / Qualità dell’ambiente urbano – XI Rapporto (2015)
ISPRA Stato dell’Ambiente 63/15 pagg. 444-465
445
Abstract
The relevant Community legislation – Council Directive 91/271 / EEC concerning
urban waste water treatment- establishes a series of deadlines for the compliance of
collecting and treatment systems in all agglomerations (
an area where the population
and/or economic activities are sufficiently concentrated for urban waste water to be
collected and conducted to an urban waste water treatment plant or to a final
discharge point
).
All agglomerations, which represent the territorial units of reference data relating to
collecting systems – wastewater treatment plants, must be provided with collecting
systems for urban wastewater having technical requirements appropriate to
agglomerations size and sensitive receiving waters. The selected cities have different
schemes of collecting systems and wastewater treatment systems, that reflect the
characteristics of the cities and must take into account the consistency of the organic
load produced and the degree of sensitive areas.
In order to show the degree of collecting systems and wastewater treatment
compliance with national and EU legislation, particularly important are the size of
urban centers, in terms of biodegradable organic load,
expressed in population
equivalent (p.e.)
; the degree of coverage of collecting systems; the discharges
compliance with the requirements of the appropriate tables in Annex I of the
Directive.
The degree of coverage of collecting systems and wastewater treatment plants was
overall quite high in most of the cities considered, in the reference year of
informations (31.12.2012).
Even compliance assessment of discharges with the Directive’s requirements was
proven to be rather high in most of the selected cities.
Keywords
Agglomeration, Discarge, Population equivalent