Far away from them? Not like they seek out humans to attack them. Grab a hold of one and it will defend itself. Leave it be and it will gladly move away from you.I'd keep my kids and chickens far away from them. A Water Monitor will take chickens as they are carnivores. Their bite is nasty and painful and easily infected. A 5 to 7 foot lizard can hurt you.
Keep the chickens in a secure run though. They will gladly scarf down the littles.
Love monitors. Beautiful!