VERT / GREEN
Confirm potable source, certified material and cleanout access.
Residential potable-water cistern
Treat source, hauling, tank material, vent, overflow, disinfection, pump, pressure and backflow prevention as one sanitary chain.
JAUNE / YELLOW
Even treated water can deteriorate in storage; maintenance, disinfection and contamination prevention matter.
ROUGE / RED
Contaminated cistern, unsuitable tank, cross-connection, unsafe access or unsafe water: stop consumption and correct.
Interactive triage
Helps choose the next step; does not replace design, permits or professional diagnosis.
Useful tools and data
- Tank/NSF data
- Water-quality history
- Pump/backflow diagram
What the professional checks
- Verify tank/installations
- Plan disinfection
- Protect potable water/backflow
Official sources
Checked 2026-08-22.
Related path
Continue with the right tools
These links connect this page to the next useful checks and decisions without repeating the full content.
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V16
Advanced diagnostics to cross-check
V16 connects water, soil, climate, safety, materials and seasonal use to existing projects.
V27
Project risks and overlooked interfaces
V27 connects payment, water, envelope, ventilation and jobsite details that often create costly surprises.
V28
Finish and service details to verify
V28 connects small details that become costly once finishes are closed.