Read the city report as a system report, not a house diagnosis

DECISION GUIDE 37

Make the next action fit the evidence

Use the condition described here to narrow the first safe action, the responsible contact, and the written authorization.

Do not pay for certainty that the observable pattern does not support.

OBSERVE

Preserve the useful clues

Match the report year and zone information to the question. For a one-house concern, compare hot and cold, multiple fixtures, duration, neighbors, work history, and city advisories.

Write the time, fixture, room, and use that preceded the change.
Photograph the wider context before taking a detail view.
Keep model labels, bills, prior repair records, and test results together.

CONTAIN

Choose the safe boundary

Use Santa Rosa Water for public-supply questions. Do not sell treatment or pipe replacement solely from taste, scale, or a system-wide table.

Containment should reduce harm without erasing evidence or transferring risk to gas, electricity, wastewater, finishes, or utility equipment.

AUTHORIZE

Put the first scope in writing

Ask any tester to state sample location, collection method, laboratory, units, benchmark, uncertainty, and how a proposed change addresses the measured result.

Ask what is included, excluded, and still unknown.
Set the price or authorization boundary before work expands.
Define the test or record that will show completion.

SANTA ROSA SOURCE

Check the current public guidance

Santa Rosa 2025 Water Quality Report

The June 2026 report covers 2025 results and says drinking water met or exceeded health standards.

Before the visit Preserve the pattern and clear only safe access.
At diagnosis Ask what observation or measurement supports the conclusion.
Before repair Verify the legal provider and compare the complete written scope.
At closeout Review tests, remaining limits, permits, cleanup, and documents.