Safe Drinking Water
Deliver water that is safe, available, reliable and tested at the point of use.
Define the service failure before selecting infrastructure.
A household connection does not prove safe water reaches the tap when needed.
Contamination may enter at source, treatment, storage, network or household.
Record state, district, city/block, village/ward or supply zone; season and date; source or asset; affected users; observed service; measurement or sample method; photo/document where safe; and uncertainty. Never imply 100-metre accuracy unless the evidence genuinely supports it.
Test the full source-to-service chain.
Source risk not linked to treatment
Treat this as a hypothesis until records, field observation, seasonal evidence and credible alternatives are checked.
Sampling misses intermittent contamination
Treat this as a hypothesis until records, field observation, seasonal evidence and credible alternatives are checked.
Network pressure and storage allow ingress
Treat this as a hypothesis until records, field observation, seasonal evidence and credible alternatives are checked.
Results do not trigger rapid corrective action
Treat this as a hypothesis until records, field observation, seasonal evidence and credible alternatives are checked.
Components that must work together.
Source protection
Define the responsible actor, operating standard, input, handoff, maintenance requirement, failure trigger and evidence record.
Treatment performance
Define the responsible actor, operating standard, input, handoff, maintenance requirement, failure trigger and evidence record.
Microbial and chemical testing
Define the responsible actor, operating standard, input, handoff, maintenance requirement, failure trigger and evidence record.
Storage and distribution hygiene
Define the responsible actor, operating standard, input, handoff, maintenance requirement, failure trigger and evidence record.
Rural, urban, school and public facilities
Define the responsible actor, operating standard, input, handoff, maintenance requirement, failure trigger and evidence record.
Contamination alerts and emergency supply
Define the responsible actor, operating standard, input, handoff, maintenance requirement, failure trigger and evidence record.
Match intervention to hydrogeology, settlement and service capacity.
Use source-to-tap water-safety plans.
Test risk-appropriate microbial and chemical parameters with chain of custody.
Publish alerts, alternative supply and correction status.
Verify schools and high-risk communities separately.
Diagnose, protect, pilot, measure and institutionalise.
Verify & protect
Confirm the location, affected users, service chain, immediate health or safety risk, responsible agency and existing evidence.
Controlled pilot
Instrument one supply zone from source to representative taps and test the alert-to-correction pathway.
Durable system
Fund operations, preventive maintenance, skilled teams, monitoring, public reporting, correction pathways and independent evaluation.
Measure service and outcomes—not assets alone.
Water interventions can transfer risk across people, places and time.
- RiskFalse assurance from sparse samplesPrevention · accountable owner · trigger · remedy
- RiskPublishing household identityPrevention · accountable owner · trigger · remedy
- RiskTreatment chemicals mismanagedPrevention · accountable owner · trigger · remedy