i checked it causw after a couple days standing in the bucket i have for the deer ,i noticed a brown rust look on the bottom,,so yesterday i cleaned all the buckets and refilled them,,this morning ,same thing a rust look,,be interesting to know if its actually benifitul to the plants,,they love it for sure,,better than last place,,it had liquid limestone coming from faucet,,are well is 500 foot deep water taste great,even mama enjoys it,,she wouldnt drink nothing but bottle water since we moved to this part of texas and she like this water