"Hardcore Pawn" patriarch Les Gold is joining the fight to get clean water to Flint, Michigan by running a bottled water drive right out of his famous store.
Les' popular TV show shoots at his shop in Detroit, so the Flint crisis hits close to home. He tells TMZ ... his family will match every bottle of water the public drops off at their store -- which will then be shipped off to Flint.
If you've missed it ... the city's in big trouble after drawing its water supply from the highly corrosive Flint River. The filthy water combined with old lead pipes have cut off residents from fresh water, and the feds are investigating to figure out who screwed the pooch.
The 'Hardcore' crew joins other celebs who've pitched in ... including Cher, Meek Mill and, of course, Flint native Michael Moore.