Water and SDG 4: Why Quality Education Starts at the Water Source

FairAction's founder, Dr Samuel Adeoti, walked four kilometres a day to a contaminated stream as a child in Nigeria, fell ill from what he drank, and missed school as a consequence. The walks took him past donor-funded boreholes that had been celebrated when built and abandoned soon after.[18] That is the originating evidence for this article. The connection between unreliable water service and disrupted education was not something the organisation was taught. It was something its founder lived, and it is the daily reality of tens of millions of children across sub-Saharan Africa and South Asia today.

FairAction is a research-led water charity advancing SDG Target 6.1: universal and equitable access to safe and affordable drinking water for all. Over more than nine years we have mapped 1,700 communities in Nigeria, catalogued 265 sustainability challenges that undermine lasting water service, and validated a predictive sustainability model through live, longitudinal field deployments. The mission is global. Nigeria is the validation context; the model is built to be adapted to the other regions where SDG 6.1 is hardest to deliver, and where SDG 4 is most off track for the same reasons.

SDG 4 sits where the founding experience and the operational mission converge. The case made below for water as a determinant of education outcomes is not abstract for us; it is the analytical reading of what gave the organisation its purpose. The water deprivation that keeps a community from drinking safely is the same deprivation that keeps its girls fetching instead of studying, that fills its clinics with the illnesses that empty its classrooms, and that leaves its schools without the toilets adolescent girls need to stay enrolled.

The 2026 UNESCO Global Education Monitoring Report records 273 million children, adolescents and youth out of school in 2024, rising to around 286 million when adjusted for humanitarian undercounts. The number has risen for seven consecutive years. The out-of-school rate in low-income countries stands at 36 per cent, four times the rate in upper-middle-income countries.[1] Sub-Saharan Africa carries the heaviest concentrated share, and Nigeria the highest country-level burden in the world: UNICEF estimates 18.3 million Nigerian children out of school in 2024, with 74 per cent of children aged 7 to 14 lacking basic reading and mathematics skills.[2]

The water picture sits in parallel. The 2025 WHO and UNICEF Joint Monitoring Programme report records 2.1 billion people without safely managed drinking water and 1.8 billion without water on premises. In two out of three of those households, women and girls do the collection, and in sub-Saharan Africa and Central and Southern Asia that collection takes more than thirty minutes a day.[3] The geographies where SDG 4 is most off track are the geographies where SDG 6.1 is hardest to deliver. The mechanisms that connect them are direct.

Three SDG 4 targets carry water inside them in ways the education sector under-acknowledges. They correspond to the three pathways by which water service determines whether a child can be in school, can learn while there, and can stay enrolled.

These three mechanisms account for the largest part of water's role in SDG 4 outcomes. The literature surfaces three more the sector should be aware of. Cognitive development is compromised by chronic exposure to the disease environment that unsafe water sustains, producing a structural rather than pedagogical deficit by the time children reach school age.[9] Adult lifelong learning under SDG 4.6 depends on the time and stability that on-premises water service provides, and the women carrying the collection burden are the same women whose adult-education participation stays below target.[3] And education for sustainable development under SDG 4.7 is implicated too: a generation growing up with broken water systems carries that experience into its understanding of what infrastructure does and does not deliver.

Progress over the past two decades is real and worth acknowledging before pivoting to what remains. Primary completion rates have risen globally from 77 per cent in 2000 to 88 per cent today; lower secondary from 60 to 78 per cent; upper secondary from 37 to 61 per cent.[1] The gender gap at the global level has closed and in some regions reversed, although sub-Saharan Africa remains the region where young women continue to face the largest secondary completion disadvantage.

The WASH-in-schools agenda has moved onto the global monitoring radar as well. The 2024 JMP update introduced the menstrual health indicators that were missing from earlier reporting cycles, giving the sector the tools to be held accountable to outcomes it previously could not measure.[4] None of that monitoring infrastructure existed a decade ago.

Global progress on enrolment and completion has not translated evenly into the regions where the burden is concentrated. Out-of-school populations have risen for seven consecutive years, and low-income countries are diverging further from the rest of the world.[1] On the household water side, the constraint that limits SDG 4 outcomes is the same one that limits SDG 3: the gap between water access and water service. A handpump that delivers water for two-thirds of the year does not free a girl from the daily collection journey during the third when it does not.

On the schools side, the trial evidence is more sobering than the policy literature suggests. School-based WASH built on top of a community whose household water service remains broken produces inconsistent effects, because the constraint on attendance was never inside the school. On the household side, a month-long outage in the dry season, when the alternative sources are the contaminated ones, is exactly the kind of failure that keeps a girl fetching and out of class.

Access is not service. Water systems advance SDG 4 only while reliable service continues, and schools WASH and household water service have to be planned together.

Each of these positions is contested within the sector. We set them out because we think the contest matters.

The constraint the FairAction Model was built to solve is not the absence of water investment. More than 46 per cent of water projects in Nigeria have been documented as failed and abandoned.[16] In FairAction's own mapping of 1,700 communities in Oyo, Osun and Ekiti states, 49.8 per cent lack any improved water source at all, and roughly one in four mapped communities is one where an investment was made and lost.[16] The problem is the absence of a system that converts investment into water service that lasts long enough for the downstream outcomes, educational ones included, to follow. The model integrates three functions as a single connected practice.

Diagnose and design: each community on its own terms

Local conditions, governance, geography and patterns of past failure are read together before any solution is committed. The diagnostic work is grounded in a systematic review of the literature and the mapping of more than 1,700 communities, from which 265 sustainability challenges have been catalogued across 52 themes and six root causes to drive the model's predictive logic.[15]

Implement and learn: services, not projects

Each infrastructure carries years of preparatory research before the build and live longitudinal monitoring after, capturing performance data a conventional water project never generates. The longest-running site has now produced more than four and a half years of continuous data, and the cumulative learning gives the next deployment a better starting point than the last.

Strengthen and scale: every community makes the next one better

What works is held inside the model and used to expand the work, shared and adapted to new regions through frameworks, tools and partnerships. The underlying research has been published across peer-reviewed international water journals and developed through an Industry Doctorate Programme with the University of Technology Sydney, providing the external scientific review the model rests on.[15][16][17]

This is the architecture by which FairAction turns the analytical argument into a working system. Reliable household water service is the precondition for SDG 4 outcomes in geographies where it is missing; the way to deliver that service at scale is the model. The children who fetch from FairAction's kiosks before and after school, and who fill their school water bottles from them, are the most direct daily readout of what the model contributes to SDG 4.[19]

Three implications follow from the argument, before the funding one.

• SDG 4.1 is structurally dependent on SDG 6.1. The current trajectory will not deliver universal completion of quality primary and secondary education by 2030 in sub-Saharan Africa, and the gap will be largest where household water service is least reliable. Planning each separately is one of the reasons both are off track.
• The schools WASH gap is the most underweighted issue in the education architecture relative to its consequences. The mechanisms that push adolescent girls out of secondary education are clear, the JMP monitoring exists to track them, and the funding has not yet followed.
• WASH in schools is necessary but not sufficient. School-based WASH and household water service should be planned together, funded together and monitored together. Neither delivers what the SDG 4 agenda requires on its own.

If you fund education, this article is a case for where part of the money goes. In the geographies where SDG 4 is most off track, the single most cost-effective marginal contribution to attendance, learning and completion is not another classroom or another teacher-training programme on their own. It is sustained household water service that frees children's time and protects their health long enough for the rest of the education investment to take hold.

That is what the FairAction Model is built to deliver. It rests on more than nine years of research, on 1,700 communities mapped in Nigeria, on a catalogue of 265 sustainability challenges that conventional projects do not anticipate, and on infrastructure operating in continuous longitudinal service. The model is built to be adapted beyond Nigeria, to the other regions where SDG 6.1 is hardest to deliver and where the educational consequences of failure are highest. We invite donors, foundations and institutional funders working in education or in joint education and WASH portfolios to engage with us directly on how a sustainable service approach can be embedded in the programmes you support.[19]