Ervia, previously known as Bord Gáis[5] or Bord Gáis Éireann (Irish pronunciation: [ˈbˠoːɾˠd̪ˠ ˌɡaːʃ ˈeːɾʲən̪ˠ]; meaning "Gas Board of Ireland"), is a multi-utility company distributing pipeline natural gas and dark fibre services in Ireland.

Bord Gáis Éireann was therefore renamed Ervia in June 2014 and as a result no longer sold gas directly to customers.

Other town gas companies were acquired by Bord Gáis in Cork, Limerick, Clonmel, and Kilkenny.

[citation needed] For nearly two decades the main supply of gas available for Bord Gáis came from a Marathon Petroleum owned gasfield near Kinsale, off the Cork coast.

Beginning in the early 2000s Ireland's state owned public utilities underwent major reform thanks to the adoption by EU members of the European Union's Third Energy Package.

In February 2012 the Irish government announced it would sell Bord Gáis Energy as required under the bailout terms.

[citation needed] Aurora Telecom specialises in providing dark fibre services to the private sector.

In February 2012 the Irish government announced its intention to sell Bord Gáis Energy as part of the reforms required following the banking crisis bailout and finalised the deal in June 2014.

The Utility Regulator for Northern Ireland awarded Bord Gáis a licence to supply homes and businesses in the towns and cities near the two pipelines - Antrim, Armagh, Ballymena, Ballymoney, Banbridge, Craigavon, Derry, Limavady and Newry - where the local subsidiaries of BG used the trading name of Firmus Energy.

On 1 December 2005, Firmus launched their first supply in Northern Ireland, to the large Michelin tyre factory in Ballymena.

As part of the Irish government's disposal of state owned assets Firmus Energy was sold in March 2014 to iCON Infrastructure.

On 4 July 2008, an "arms-length" subsidiary of Bord Gáis, Gaslink was established to perform the role of transmission and distribution system operator.

However, as part of cost-cutting measures on 1 August 2015 Gaslink was abolished and its responsibilities rolled back into Gas Networks Ireland.