Comparable facts

Catchment testing workflow comparison

Build a household catchment maintenance and water-testing plan while keeping health decisions tied to current Hawaiʻi guidance and test results. Individual household catchment systems are not a substitute for a regulated public water system.

Map the water pathRoof and gutter materials, condition, nearby contamination risks, and cleaning practices are documented. Pump, pressure tank, controls, filters, disinfection equipment, bypasses, and plumbing are labeled.

Write the scheduleEquipment manuals and manufacturer replacement intervals are available. A current water-testing plan is selected using DOH guidance and qualified advice rather than a generic promise. Hawaiʻi DOH rainwater catchment guidance

Plan for changing conditionsA plan exists for storms, ash, wildfire smoke, animal contamination, unusual color/odor, roof work, equipment failure, and extended power outages. Emergency drinking water and delivered-water access are planned.

Write the schedule

Equipment manuals and manufacturer replacement intervals are available.Filter, UV lamp/sleeve, tank, roof, gutter, pump, and pressure-system service dates are recorded.A current water-testing plan is selected using DOH guidance and qualified advice rather than a generic promise.Results, laboratory details, actions taken, and follow-up results are retained.

Plan for changing conditions

A plan exists for storms, ash, wildfire smoke, animal contamination, unusual color/odor, roof work, equipment failure, and extended power outages.Residents know when to stop relying on the system and seek current health guidance.Emergency drinking water and delivered-water access are planned.No one treats appearance, taste, or a single old test as proof of continuing safety.

Related tools

Continue the roof-to-tap plan

Pair this schedule with the sizing calculator, buyer inspection checklist, and annual maintenance budget.

Primary sources

Use current Hawaiʻi guidance

Individual household catchment systems are not a substitute for a regulated public water system. Maintenance and testing reduce uncertainty but do not create a permanent guarantee.

Catchment testing workflow comparison

Map the water path

Write the schedule

Plan for changing conditions

Continue the roof-to-tap plan

Use current Hawaiʻi guidance

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