The human body can survive weeks without food, but begins experiencing fatal organ failure within 72 hours of water deprivation. Here is an engineered, low-cost domestic water resilience system designed for flats and urban homes.
Bulk 200L blue drums are impractical for flats and rented accommodation. A compact, zero-footprint baseline uses 2x 20L Collapsible Food-Grade Water Jerrycans with Tap & Lid (approx. £14 / €16 per pair).
Milton Disinfecting Fluid contains pure, stabilized 1.9–2.0% sodium hypochlorite with zero fragrances, thickeners, or colorants, making it significantly safer for water sanitation than commercial laundry bleaches.
| Container Volume | Clear Tap Water Dosage | Cloudy / Harvested Water Dosage | Contact Dwell Time |
|---|---|---|---|
| 1 Litre | 0.5 ml (approx. 10 drops) | 1.0 ml (approx. 20 drops) | 30 to 60 Minutes |
| 5 Litres | 2.5 ml | 5.0 ml | 30 to 60 Minutes |
| 20 Litres (Standard Tank) | 10.0 ml (measure via oral syringe) | 20.0 ml | 30 to 60 Minutes |
Tip: Keep a small 5ml or 10ml oral medicine syringe stored with your Milton bottle to prevent accidental over-chlorination.
4–8 layers of clean, tightly woven cotton (t-shirt, tea towel). Removes suspended silt, sand, and visible debris. Does not stop bacteria or parasites. Only clarifies water so chemicals can function.
Cost: £0.00 / €0.000.1-micron hollow-fiber membrane straw filter. Screws onto standard 28mm PCO bottle threads. Filters up to 1,500L of raw freshwater.
Cost: £12 – £16 / €14 – €190.1-micron absolute hollow fiber membrane. Field-proven against 99.99999% bacteria and microplastics. Rated for 100,000 gallons with regular backwashing.
Cost: £30 – £45 / €35 – €52