What about home plumbing?

Discoloration can also be caused by household plumbing, especially in older homes with galvanized pipes. It is most noticeable first thing in the morning or after long periods of low or no water use. It can also occur at seldom-used faucets. A 1-2-minute flush should remove the discolored water. If it only occurs in hot water, flushing the hot water heater may resolve this by removing sediment located in the bottom of the tank. We recommend researching this before trying to flush the tank yourself. Here's a helpful YouTube video.