Collect a water sample in a clean, labeled container
Use gloves and avoid contaminating the sample
Rinse the container with sample water (if the kit instructions allow)
Fill the container to the line indicated by the test kit or lab instructions
Test as soon as possible after collection
Record sample location, date, time, and any relevant conditions (weather, recent spills, odor/color)
If using a home test kit, follow the exact test-strip or reagent instructions
Measure and record results for each parameter the kit supports (e.g., pH, chlorine, nitrates, nitrites, hardness, alkalinity, dissolved oxygen)
For pH, use a calibrated pH meter or fresh test strips and record the reading
For chlorine/chloramine, use the appropriate free chlorine or total chlorine method
For metals (e.g., lead, copper, arsenic), use an EPA-style test kit or send to a certified lab
For bacteria, use a water test kit designed for total coliform/E. coli or send to a certified lab
Use sterile bottles for microbiological testing and follow holding-time requirements
If required, preserve samples according to the kit or lab instructions
For turbidity/sediment, use a turbidity meter or follow the kit method and record NTU values
Compare results to applicable drinking-water standards or your local guidelines
If results are concerning, retest with a new sample and/or contact a certified water testing laboratory
If you use a lab, request chain-of-custody if required and follow their sampling directions
Dispose of test chemicals and used materials according to the kit instructions
Keep all records of results and sample details for follow-up actions