Color in water is usually caused by naturally occurring organic matter, minerals, or mineral build-up in the pipes. At Hawaii Water, we flush our water system regularly to clean mineral build-up and other sediment from the pipes. If you receive discolored water, you should let your faucets run until the water is clear. Such substances typically do not pose a health hazard; however, we ask that you please contact us to report any instances of discolored water so that we may investigate.