There's no untouchability in India now except where you see some old people which is a rarity these days.
I'm from a Brahmin family and I've never witnessed untouchability among my generation. I've friends from every community. And as I'm already 35, my following generation does not show a little trace of it.
Again, telling you this because I can practically see no practice of untouchability these days in schools, colleges, marketplaces and anywhere else.*