ACEA Ato2 S.p.A.

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 2012.


Drinking water

ACEA Ato2 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 Ato2 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 73 municipalities in addition to Rome.

During the snowfalls of February 2012, in line with the snow and ice emergency plan 2011-2012, adopted by ACEA Ato2 S.p.A. in the entire territory handled, the company implemented all possible initiatives to limit problems for users and restart operations of the plants affected by power blackouts.

Critical situations occurred mainly during the snowfall of 3-6 February of this year due to power blackouts at local wells and sewage pumping stations, which in some cases lasted for many days, and principally regarded the vast area supplied by the Simbrivio and Doganella aqueducts.

2012 was also characterised by exceptional drought at the national level. In particular, in the territory of the municipality of Rome, there was 12% less rainfall than the annual averages of 2000-2011. The three summer months of 2012 were particularly dry, with 78% less rainfall than the average of the summers of 2000-2011. At the same time, summer 2012 was very hot, with maximum temperatures in the area managed by ACEA Ato2 S.p.A. an average of 2.2°C higher than the averages recorded in the summer months of 2008-2011.

Therefore, the combination of less water availability, heat and high consumption caused water crisis situations in summer 2012 in numerous municipalities falling within the territory of the Province and temporary drops in pressure, particularly on the higher floors of buildings, also in some limited areas of the city of Rome.

The water deficit situation was contained through focused management of water resources.

To face the emergency underway in numerous municipalities managed, beginning in June ACEA Ato2 S.p.A. deployed a supply service using tanker trucks which made it possible to limit problems for residents. That service was also incentivised with emergency credit facilities. The tanker trucks, depending on the crisis situations that occurred, were dedicated to refilling municipal tanks and/or supplying private users and/or supplying water to the public.

The water shortage made it necessary to rely on emergency supply sources, first and foremost Lake Bracciano.

Furthermore, another of the main actions carried out in 2012 to face the water crisis in the areas supplied by the Simbrivio Aqueduct was the emergency entry into operation of the new Arcinazzo reservoir and the new Pertuso booster, which made it possible to transport higher volumes in the aqueduct. In June 2012, the Monte Palombino booster also began operating, making it possible to improve the water supply in the municipality of Fonte Nuova by the pumping the waters of Peschiera Sinistro.

With regard to the exception provisions on water quality, the Decree of the President of the Lazio Region T0258 of 29 July 2011 for arsenic and Presidential Decree T0076 of 11 March 2011 for fluorine, made provision for the return within the limits set by Legislative Decree no. 31/01 by 31/12/2012. In 2012 the company continued carrying out the work set out in the restoration plans.

The works conducted to date have made it possible to return to within the limits set by Legislative Decree 31/01 for the majority of the population initially affected by the exceptions, which went from just over 150,000 residents to approximately 5,000 residents at the end of December 2012, for which an alternative supply was in any case activated through mobile tanks and small fountains equipped for on-site treatment. The works set forth in the restoration plans are now complete except for two activities still underway due to the extended timing for obtaining legal authorisations to execute the works.

Simultaneously, an information campaign was targeted at the population, in agreement with the municipal administrations, ASL (Local Health Authorities) and STO. As regards the vanadium, ACEA Ato2 S.p.A. completed works for the restoration and, in any case, in December 2011, the Ministry of Health changed the value of the vanadium parameter from 80 micrograms/litre to 140 micrograms/litre.


Sewerage and waste water treatment

The sewerage service comprises a sewage network of about 6,126 km (including approximately 4,160 km of network serving the municipality of Rome) and more than 300 km of collectors.

ACEA Ato2 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 2012 the main waste water treatment plants handled around 509 million cubic metres, a decrease of around 14.9% compared with the previous year. This decrease was caused by the low level of rainfall recorded in 2012 compared to last year.

Sludge, sand and grating production for all managed plants was equal to 146,163 tonnes, down approximately 3.1% compared to the previous year.

At the end of December 2012, ACEA Ato2 S.p.A. managed a total of 513 sewage pumping stations, including 174 in the municipality of Rome, and a total of 175 waste water treatment plants, including 35 in the municipality of Rome.


Research and development

In cooperation with LaboratoRI S.p.A., research and development activities continued, in terms of the analysis of distribution networks and research of leaks according to the district metering approach set out in Ministerial Decree 99/97, which was performed mainly in the municipalities of Monterotondo, Riano, Fiano Romano, Cerveteri, Subiaco, Formello, Mentana, Velletri and Santa Severa in the municipality of Santa Marinella.



Details on the resolutions made by the Mayors’ Conference in April 2012 and the impacts of AEEG resolution 585/2012 are provided in the section “Service concession arrangements”.