There are at least 10 groups with the name H2O (including H₂O):
These are photos from concerts where H2O played, so they may be of other bands that played the concert as well.
Vans Warped Tour 25 Year Anniversary Jun 29 - 30, 2019 Atlantic City, New Jersey, United States Uploaded by Cardi
Rancid / The Mighty Mighty Bosstones / Suicidal Tendencies / L7 / H2O May 11, 2019 Phoenix, Arizona, United States Uploaded by Trevor Ronde
H2O / Murphy's Law / The Last Stand Sep 23, 2017 New York, New York, United States Uploaded by Cdarby6
Festival Envol et Macadam Sep 7 - 9, 2017 Québec, Quebec, Canada Uploaded by Simon Bélanger
Ignite / H2O / Terror / Iron Reagan / Twitching Tongues / Wisdom in Chains Jan 18, 2016 Paris, Île-de-France, France Uploaded by Zeta Kebab
H2O / Alone / Homeboys Oct 19, 2015 Paris, Île-de-France, France Uploaded by Zeta Kebab
It's Not Dead Fest Oct 10, 2015 San Bernardino, California, United States Uploaded by Felix Joel Garcia
Vans Warped Tour ‘15 Aug 2, 2015 Denver, Colorado, United States Uploaded by Sienna Araya King
Warped tour ‘15 Jul 29, 2015 Noblesville, Indiana, United States Uploaded by Annabellewalker