GRI environmental performance indicators

The indicators, in the table, relating to the environmental performances (core and additional) envisaged by the GRI-G3.1 Guidelines, 2011 edition, together the indicators introduced by the Electric Utility Sector Supplement93 are shown below, with indication of the sections and pages of the report where it is possible to find them.
The meaning of each performance indicator is illustrated in the Guidelines and Sector Supplement, available on the website

The Environmental accounts, an integral part of the report, also include more than 250 items which represent the production values, the resources used and the outputs (waste and emissions), along with around 60 indicators/ parameters of environmental importance, selected so as to clearly and concisely describe the Group’s performances.



EN1 (Core)
Materials used by weight or volume.
Environmental accounts: pages 241 et seq.
In relation to PCB, Acea had already taken steps by 31 December 2009 to dispose of all transformers with PCB exceeding the threshold of 500 ppm, in compliance with Italian Legislative Decree No. 209/99 and Italian Law No. 62/05.
There were 332 transformers with PCB exceeding 50 ppm but below the aforementioned threshold in 2012 (407 last year).

EN2 (Core)
Percentage of materials used that are recycle input materials.
Preparatory action is underway for the establishment of a monitoring system capable of tracing the quantities of recycled materials which are used to replace virgin materials. No significant data is available at present. Over the next three years, the figure should be more or less fully re-established, partly thanks to the implementation of a suitable computerised information system.


EN3 (Core)
Direct energy consumption by primary energy source.
Environmental issues page 216

EN4 (Core)
Indirect energy consumption by primary source.
Environmental issues pages 216 et seq.

EN5 (Additional)
Energy saved due to conservation and efficiency improvements.
Environmental issues pages 204, 206

EN6 (Additional)
Initiatives to provide energy-efficient or renewable energy-based products and services, and reductions in energy requirements as a result of these initiatives.
Environmental issues pages 198, 206

EN7 (Additional)
Initiatives to reduce indirect energy consumption and reductions achieved.
Environmental issues page 207


EN8 (Core)
Total water withdrawal by source.
Environmental issues pages 217 et seq.

EN9 (Additional)
Water sources significantly affected by withdrawal of water.
Environmental issues page 209

EN10 (Additional)
Percentage and total volume of water recycled and reused.
Environmental issues pages 217 et seq. (limited to the cooling process of the thermoelectric installations)

93 The indicators of the Electric Utility Sector Supplement (EU) are supplemented in the table; the text disciplines distinct matters for energy companies, introduces new indicators (EU) and a number of in-depth notes (commentary) relating to indicators already envisaged by the 2006 version of the GRI Guidelines.


EN11 (Core)
Location and size of land owned, leased, managed in, or adjacent to, protected areas and areas of high biodiversity value outside protected areas.
Environmental issues pages 194, 209

EN12 (Core)
Description of significant impacts of activities, products, and services on biodiversity in protected areas and areas of high biodiversity value outside protected areas.
Environmental issues page 194

Biodiversity of offset habitats compared to the biodiversity of the affected areas.
Environmental issues page 194

EN13 (Additional)
Biodiversity of offset habitats compared to the biodiversity of the affected areas.
Environmental issues page 194

EN14 (Additional)
Strategies, current actions, and future plans for managing impacts on biodiversity.
Environmental issues page 194

EN15 (Additional)
Number of IUCN Red List species and national conservation list species with habitats in areas affected by operations, by level of extinction risk (*).
At present, this item is not monitored since in the area in which the Group is operative, none of the species listed on the red list are present. In any event, the Group carries out its activities strictly respecting and protecting the natural habitats concerned and the fauna and flora present in the areas it operates in.


EN16 (Core)
Total direct and indirect greenhouse gas emissions by weight (according to the WRI – Greenhouse gas Protocol).
Environmental issues page 220; Environmental accounts page 244, 246 et seq.

EN17 (Core)
Other relevant indirect greenhouse gas emissions by weight.
No significant emission to be reported.

EN18 (Additional)
Initiatives to reduce greenhouse gas emissions and reductions achieved.
Environmental issues page 206

EN19 (Core)
Emissions of ozone-depleting substances by weight.
Environmental issues page 220

EN20 (Core)
NOx, SOx, and other significant air emissions by type and weight.
Environmental issues page 220; Environmental accounts pages 244, 246 et seq.

EN21 (Core)
Total water discharge by quality and destination.
The water which is used by the Acea structures for “non-industrial/sanitary” use (around 2 Mm3 in 2012) underwent the same standard treatment used for civil waste water. The environment impact produced on the receiving water body by the outflow of the treated water, is particularly contained.

EN22 (Core)
Total weight of waste by type and disposal method.
Environmental issues page 221; more detailed information in the Environmental accounts.

EN23 (Core)
Total number and volume of significant spills.
In 2012, no significant amounts of pollutants such as mineral oil, fuels or chemical products were released into the environment.

EN24 (Additional)
Weight of transported, imported, exported, or treated waste deemed hazardous under the terms of the Basel Convention Annex I, II, III, and VIII, and percentage of transported waste shipped internationally.
The Group sends 12,487 tons of hazardous waste, CER 190111 - part of the heavy ash produced at the San Vittore del Lazio (FR) plant - to plants in Germany for recovery.

EN25 (Additional)
Identity, size, protected status, and biodiversity value of water bodies and related habitats significantly affected by the reporting organization’s discharges of water and runoff.
No discharge to be reported which significantly affected the habitats or biodiversity.

*The IUCN (International Union for the Conservation of Nature) list, to which the EN15 indicator refers, concerns endangered species (


EN26 (Core)
Initiatives to mitigate environmental impacts of products and services, and extent of impact mitigation.
The products supplied (electricity, heat, drinking water, treated water and public lighting) do not have significant environmental impacts since they do not give rise to either pollution or harmful emissions.
Environmental issues pages 195, 198, 219 et seq.

EN27 (Core)
Percentage of products sold and their packaging materials that are reclaimed by category.
Not applicable.


EN28 (Core)
Monetary value of significant fines and total number of non-monetary sanctions for noncompliance with environmental laws and regulations.
Environmental issues page 195


EN29 (Additional)
Significant environmental impacts of transporting products and other goods and materials used.
Environmental issues pages 216 et seq.


EN30 (Additional)
Total environmental protection expenditures and investments by type.
Environmental issues page 196