Better Water Information

Every 60 seconds, a child under five dies from a preventable waterborne disease. In rural East Africa, where safe water sources are often miles away and treatment methods are inconsistent, the battle against diarrhea is fought daily. Evidence Action’s Dispensers for Safe Water program offers a remarkably simple yet devastatingly effective solution: community-level chlorine dispensers installed directly at the point of collection. This analysis dives into the mechanics, economics, and life-saving potential of this top-rated water project.

Technology & Methodology

The core innovation of Evidence Action is not a high-tech filter or a complex pipeline system. It is a durable, low-maintenance chlorine dispenser mounted at communal water sources such as boreholes, springs, and shallow wells. The methodology is elegantly straightforward:

Point-of-Collection Treatment: Users place their jerrycan under the dispenser and turn a valve, releasing a precisely measured dose of dilute sodium hypochlorite (chlorine).
Simple User Interface: No special training is required. The dispenser's design ensures a consistent dosage, eliminating the risk of over- or under-chlorination.
Supply Chain Integration: Evidence Action manages a robust "last-mile" supply chain. Local "promoters" (often community members) are paid a small stipend to refill the chlorine solution, replace broken parts, and educate users on the importance of consistent treatment.
Behavioral Nudge: The dispenser is placed at the water source, making treatment a frictionless habit. Users treat water immediately upon collection, rather than relying on home-based treatment that is often forgotten or abandoned.

This hardware-based approach bypasses the common pitfalls of household water treatment—such as lack of fuel for boiling or the cost of purchasing tablets—by making safe water the default, easy choice.

Cost-Effectiveness & Sustainability Analysis

Evidence Action is widely recognized as a benchmark for cost-effectiveness in global health. The numbers are staggering:

Cost Per Person: $1.50 to provide safe water for an entire year. This is the total cost of the dispenser, chlorine refills, and operational support.
Lifespan: Each dispenser is designed to function for 5 years with routine maintenance. This means a one-time installation cost yields half a decade of continuous protection.
Cost Per DALY Averted: Independent analyses estimate the cost at roughly $5 to $10 per Disability-Adjusted Life Year (DALY) averted, placing it among the most efficient health interventions in the world.
Leverage Ratio: For a donation of $1.50, you prevent a child from contracting a potentially fatal case of diarrhea. The leverage is extreme, as treating a single case of severe diarrhea in a clinic can cost more than providing safe water for an entire community for a year.

Sustainability is built into the model. By using a cheap, locally-procured consumable (chlorine) and a durable dispenser, the program avoids the "white elephant" problem of broken hardware. The community promoter model ensures local ownership and accountability, while Evidence Action’s monitoring data tracks dispenser functionality in real-time.

Regional Impact: Sub-Saharan Africa

The program operates with surgical precision in three high-burden countries: Uganda, Kenya, and Malawi.

Uganda: With a high prevalence of open defecation and limited piped water, Uganda sees a massive reduction in childhood diarrhea in communities with dispensers. The program has scaled to reach millions of people.
Kenya: In rural Western Kenya, where water sources are often contaminated by agricultural runoff, the dispensers provide a critical line of defense. The program has shown a 40-50% reduction in child diarrhea incidence in intervention areas.
Malawi: A country with one of the highest rates of stunting in the world, linked directly to repeated waterborne infections. The dispensers are a low-cost, high-impact tool to break the cycle of infection and malnutrition.

The cumulative impact is enormous: Evidence Action estimates the program has averted over 80,000 child deaths across the three countries since its inception.

WASH Expert Assessment

Rating: A (Top Tier)

From a WASH professional’s perspective, Evidence Action’s Dispensers for Safe Water is a masterpiece of applied public health engineering. It excels on all critical criteria:

Effectiveness: Proven through rigorous randomized controlled trials (RCTs) to reduce childhood mortality.
Cost-Efficiency: Unmatched. The $1.50 per person per year figure is the gold standard in the sector.
Scalability: The model is designed for massive scale, already reaching over 10 million people.
Simplicity: The technology is so simple that it is nearly impossible to misuse, and it works without behavioral complexity.

The only minor caveat is that the program is limited to areas with existing communal water points. It does not solve the problem for households that rely on unprotected open sources. However, within its target niche, it is arguably the single best buy in global water charity. The UK Gift Aid eligibility further amplifies the value for UK donors, making every pound stretch even further. For a donor seeking maximum impact per pound, this project is a definitive recommendation.