Recommended for those noticing yellow or discolored water. Yellow-tinted water can come from a variety of causes such as naturally occurring tannins (especially common in well water) or metals such and manganese, iron, or zinc.  This Tap Score water test package provides all required materials to properly collect and submit a sample for certified laboratory testing. Reported results will include detailed, quantified analysis of common metals, minerals, and tannins all of which may lead to water discoloration.