LacqLacq is a commune in the Pyrénées-Atlantiques department in southwestern France. On 1 January 2024, the former commune of Urdès was merged into Lacq.It lies just northwest of the prefecture Pau.WWW commune-lacq.frEconomyIn modern times the local economy has been based on the industrial use of subsurface petroleum reserves, and since 1951 on the extraction and development of a very large natural gas reservoir underneath the city. Processing of the large quantities of hydrogen sulfide in the gas have made Lacq a center of sulfur production.