We’ve all heard the expression, “Garbage in, Garbage out” and it applies to an ultrapure water system as well. The incoming city water feed is a critical location for routine analytical monitoring, yet often it is overlooked and/or understudied. Many times we are not aware of a negative water quality change until it shows up in our instrumentation at the Point of Distribution (POD), then we are not sure where the problem started. Keeping a close eye on the city water can aid troubleshooting by identifying (or eliminating) the feedwater as a source of the contaminant. POD upsets can be avoided all together by early detection and swift response to a city water change. Read more