I have the same issue, but it's been about week and a half and the water is still a light brown colour. The water was not this bad in colour before I shocked it.

Hey Jeanguy and welcome to The Plumbing Page on AMHD.
You piggybacked on a 2 year old dead thread so I gave you one of your own. Before you post look up in the upper left hand corner for the date.
The brown is silt, Give it another week. If you have a storage or galvanized pressure tank you might want to drain and flush them out. Get back to us in a week and let us know how you're doing. Good luck, Tom