Calgon is a brand of water softener products owned by the Anglo-Dutch company Reckitt Benckiser.

In Portugal, the Calgon advertisement jingle has been the same popular one[1][better source needed] for almost 30 years.[when?]

[2] In the UK & Ireland, Calgon started advertising on TV in March 1985 and it's still in use today.

magazine demonstrated that there was no evidence to suggest that washing machines lasted longer when treated with Calgon under "normal" washing conditions.

[3] In October 2011, Dutch TROS TV program Radar also concluded Calgon water softener is not necessary under "normal" washing conditions for Dutch customers.