The knowledge base

Every node answers the same nine questions and shows how it connects. Filter by type, search by meaning, or see the whole graph.

concept established Biosand Filter A household slow-sand filter with a biological layer that removes pathogens and turbidity.
concept established Boiling Water Bringing water to a rolling boil to inactivate pathogens — the oldest household treatment.
case study emerging Case Study — Rural Biosand Filter Program A community program distributing biosand filters, illustrating what sustains or undermines impact.
concept established Ceramic Pot Filter A fired-clay pot, often silver-coated, that filters household water by gravity.
community established Community Water Committee A local body that governs operation, maintenance, and financing of a community's water system.
concept established Household Chlorination Disinfecting drinking water at home with a measured dose of chlorine.
lesson established Lesson — Why Household Filters Get Abandoned Filters commonly fall out of use within months without follow-up, training, and local ownership.
metric emerging Metric — Diarrhoeal Disease Reduction The change in diarrhoeal-illness incidence attributable to a water intervention.
concept established Point-of-Use Water Filtration Treating water in the home at the point of consumption, rather than at a central plant.
research emerging Randomised Trial — Household Filters and Diarrhoea A field RCT reporting reduced childhood diarrhoea among households using point-of-use filters.
concept established Safe Drinking Water Water free enough of pathogens and contaminants to drink without appreciable health risk.
policy established SDG 6 — Clean Water and Sanitation The UN goal to ensure availability and sustainable management of water and sanitation for all.
concept emerging Solar Disinfection (SODIS) Disinfecting water by filling clear bottles and exposing them to sunlight for hours.
research contested Systematic Review — Water Quality Interventions A systematic review pooling water-treatment trials, tempering effect sizes for bias and adherence.
concept established Waterborne Disease Illness caused by pathogenic microorganisms transmitted through contaminated drinking water.
standard established WHO Guidelines for Drinking-water Quality The international reference standard for drinking-water safety and risk management.
organization established World Health Organization (WHO) The UN specialized agency for international public health, author of the water guidelines.