Practical steps
Find the report year and supplier. Note which parts answer your question and which do not. Keep the source link with your notes. A system report and a sample taken at your own tap describe different contexts; do not assume one answers every possible household plumbing question. Ask the supplier or an appropriate local authority about unresolved concerns.
Next step
Use the water-source comparison before paying for additional testing. Do not translate a report into a personalized health diagnosis here.