The bigger picture
A thoughtful starting point.
A useful test answers a specific question. For a private well, an annual baseline and additional locally appropriate tests form part of ongoing care. For public water, information from your utility can be a starting point, with targeted testing when needed.
Keep the context with the result
Record your source, exact sample point, existing treatment, date, result, and units. Ask a certified laboratory about collection instructions before taking a sample. Different tests can require different bottles and handling.
Hardness describes mineral content; it does not establish drinking-water safety. Likewise, a result for one contaminant says nothing conclusive about another. Read the guides below to organize the questions you take to a lab or local health department.
