Source note

Water testing context

Lab reports, sampling timing, treatment equipment notes, and local/regional water-quality context.

Records to collect

• Official forms, permits, inspection reports, or local-agency notes when available.
• Dated photos, receipts, contracts, written scopes, and follow-up notes.
• Names, dates, license numbers where applicable, and contact details for qualified local professionals.

Questions to verify locally

• Which agency or professional is responsible for the final answer?
• What written record should the homeowner keep permanently?
• What changes after repairs, weather events, ownership transfer, or project scope changes?