Return to Directory WWTP–Northwest Listed in Public Services Contact 5423 Mangum RdHouston, TX 77091 713-837-0311 Claim Listing Overview Business phone 713-837-0311 Map & Directions Directions to listing From: Current location Specific Address Travel Mode: Driving Public Transit Walking Cycling Contact/Other Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password? Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?