Decision guide
Water-change checker
A visible change is a clue, not a diagnosis. Use this guide to organize the next questions and decide who may need to be contacted.
Next questions will appear here
Select the type and timing of the change.
This tool does not identify contaminants or determine whether water is safe.
Urgent caution: after flooding, suspected chemical contamination, electrical damage, or a sudden unexplained change, follow local health or emergency guidance and consider an alternate drinking-water source until qualified advice and appropriate testing are obtained.