Acea Ato2 SpA

Since 2007 the acquisition of contracts with the municipalities involved has slowed. This has been caused by local authorities’ natural political alternation and internal difficulties within the authorities themselves.

Moreover, based on assessments carried out, certain municipalities still have problems relating to the state of treatment plants and lack of authorisation for waste disposal.
No other Integrated Water Service management was acquired in 2010.

Drinking water

ACEA ATO 2 S.p.A. provides the full range of drinking water distribution services including collection and abstraction, as well as retail and wholesale distribution.

Water is abstracted from sources on the basis of long-term concessions.

Ten water sources – including five sources (Peschiera, Capore, Acqua Marcia, Acquoria and Salone), 4 well fields (Pantano Borghese, Finocchio, Torre Angela and Torre Spaccata) and the Lake Bracciano Aqueduct – supply approximately 3,000,000 people in Rome and Fiumicino, as well as more than 60 municipalities in the Lazio region, via four aqueducts and a hierarchical system of pressurised pipes.

Three further sources of supply provide non-drinking water used in the sprinkler system of Rome.

In addition, ACEA ATO 2 S.p.A. manages the Simbrivio aqueduct, which supplies water to 54 municipalities and 3 consortia, the Laurentino aqueduct (formerly CASMEZ Lazio Regional Authority), which supplies the municipalities of Pomezia, Ardea and the Campoleone area in the municipality of Lanuvio, the Doganella aqueduct, serving 8 municipalities in the Castelli Romani area, and the distribution of water in 74 municipalities in addition to Rome.

With regard to major disruptions, the most significant ones are detailed below.

With reference to water quality, following the exceptions granted in 2009 to levels of arsenic, fluoride and trihalomethanes in certain municipalities of the ATO, 2010 saw the Lazio Region issue an extension to this derogation in regards to the vanadium parameter.

In October 2010, the European Community informed Italy of its intention to express a negative judgment on the request for the derogation regarding arsenic of 50 micrograms/l requested by the Lazio Region.

In the Municipalities in question, thanks to the works carried out, arsenic concentrations were cut to under 20 micrograms/l and on 20/11/2010 the company submitted a new request for the derogation for said parameter within a maximum allowable value of 20 micrograms/l.
The Municipalities involved in the ACEA ATO 2 works are Velletri, Albano Laziale, Castelgandolfo, Genzano, Ariccia, Lanuvio, Lariano, Ciampino, Castelnuovo di Porto Trevignano Romano and Tolfa.

Various meetings were held with the Municipalities, Local Health Authorities and the Operating-Technical Secretariat of the Central Lazio Area Authority to agree on a information campaign for citizens, acknowledging the contents of the Explanatory notes published on 30/11/2010 by the Istituto Superiore di Sanità (Higher Institute of Health).

In the meanwhile, emergency arsenic containment measures were implemented.

Sewerage and waste water treatment

The sewerage service comprises a sewage network of 6,015 km (including approximately 4,050 km of network serving the municipality of Rome) and more than 300 km of collectors.

ACEA ATO 2 S.p.A. manages the waste water treatment system and pumping stations that serve the network and sewage collectors. Some of them are quite large, with a throughput of more than 10 cubic metres/sec, and in some cases they also provide flood protection.

In 2010 the main waste water treatment plants handled 587 million cubic metres, an increase of around 11% compared with the previous year.

Sludge, sand and grating production for all managed plants was equal to 136,850 tonnes, up approximately 10% compared to the previous year.

At the end of December 2010, ACEA ATO 2 S.p.A. managed a total of 478 sewage pumping stations, including 165 in the municipality of Rome, and a total of 172 waste water treatment plants, including 35 in the municipality of Rome.

Research and development

In cooperation with LaboratoRI S.p.A., activities were carried out to analyse distribution networks and research leaks according to the district metering approach set out in Ministerial Decree 99/97.

With regard to water resources, for 2010 ACEA ATO2 S.p.A. combined some projects under development since last year with a planning activity focused on the standardisation of the water procurement and an improvement of water management.

Subsequently, in 2010 the following planning projects were implemented: “activity for the upgrading of the procurement system of the Southern Basin”, “activity for the upgrading of the procurement system of the Western Basin” and “flows to be reserved for the City of Rome and hydrological balances for the city”.

The analyses performed in the Southern Basin highlighted, through the review of sources and the reconstruction of the service districts, a series of criticalities and opportunities for providing a solution to the Integrated Water Service problems.

For the City of Rome, assessments were carried out regarding the flows currently necessary for the city’s water procurement and their contributing factors.

The new projects launched in 2010 are the following:

  1. activity for the upgrading of the procurement system of the Southern Basin;
  2. activity for the upgrading of the procurement system of the Western Basin;
  3. activity for the hydrological balance and the definition of flows to be reserved for the Municipality of Rome.

As for the Southern and Western Basins, the objective of these long-term projects is to identify medium-term (within the next 6 years) and long-term interventions (in view of drawing up proposals for the updating of the Aqueduct Local Strategic Plan (PRGA):

  • on networks, through the research of solutions of district metering and interconnection for the upgrading of distribution, optimisation of pressure and reduction of network input flows to optimal values for end users;
  • on the collection system, through solutions aimed at modifying the aqueduct areas in view of dismissing local springs that are non-compliant;
  • on procurement sources, with displacement and concentration actions aimed at reducing the number of operating plants and rendering management controls more efficient.

For more information on the tariff applied, please refer to the appropriate section “Information on concession service arrangements” in the Notes to the 2010 Consolidated Financial Statements.