The quality of the gas in the Danish gas system has been determined by the Security Agency in the Gas Regulations section C-12. The gas can come directly from the North Sea, on imports from Germany, from biogas plants after upgrading or from the gas storage in Lille Torup and Stenlille. Consumers can get gas that is a mixture from several supply areas.

The gas must at all times comply with the Danish Gas Regulations and the quality specifications in the Gas Transport Regulations. Information about variations in gas quality is published hour by hour, and month by month.