Improving Sanitation in Urban Slums: Effective Strategies and Solutions

Across Indian cities, millions of people live in dense, low-income settlements where access to clean toilets, safe water, and proper drainage is far from guaranteed. Poor environmental sanitation in these areas is not just an inconvenience; it directly fuels diarrhoeal disease, malnutrition in children, and the spread of vector-borne illness. Yet sanitation in slums is also one of the most fixable urban problems we have, provided the right mix of infrastructure, community ownership, partnerships, and behaviour change comes together. This post breaks down the practical measures that actually improve environmental sanitation in slums, and why each one matters.

Why sanitation in slums needs urgent attention 🔗

Most slums are defined by overcrowding, congestion, inadequate water supply, and weak systems for disposing of human waste, wastewater, and solid garbage. Public health researchers have long pointed out that environmental sanitation remains an under-prioritised issue in India, even though defective surroundings rob residents of health and livelihood. The cost is measurable. A study of urban slums in Kolkata found that despite progress under national programmes, gaps in water, sanitation, and hygiene access still persist in poorer pockets, keeping the risk of enteric infections high.

The picture has improved over the last decade, but unevenly. National survey data shows that roughly a third of households still lack an improved sanitation facility, and a smaller share lacks an improved drinking water source. Open defecation, while down sharply, has not disappeared. Improving sanitation here is therefore not about a single intervention but about closing several gaps at once.

Provision of basic amenities 🔗

The foundation of slum sanitation is reliable access to the basics: safe water, functioning toilets, drainage, and affordable energy. Without these, hygiene advice and cleanliness drives have little to stand on.

Safe and reliable drinking water 🔗

Piped, assured water supply is the single biggest lever. When households store water unsafely or fetch it from distant or contaminated sources, contamination risk rises sharply. The Atal Mission for Rejuvenation and Urban Transformation (AMRUT) was launched precisely to give every household a tap connection with assured supply and a sewerage link, with explicit priority for the urban poor and disadvantaged. Its second phase, AMRUT 2.0, pushes towards universal household tap coverage and “last mile connectivity,” which is exactly where slum settlements have historically been left out. For sanitation outcomes, the lesson is simple: a tap at or near the home reduces both the drudgery of collection and the contamination that happens during storage and handling.

Toilets and safe waste disposal 🔗

Adequate toilets are the heart of environmental sanitation. In high-density settlements, individual household toilets are not always feasible, so community and public toilets become essential shared infrastructure. The Swachh Bharat Mission (Urban) categorises support into individual household latrines, community toilets for areas where home toilets are impractical, and public toilets for floating populations. The mission has also tied toilet access to on-site sanitation systems like twin pits and septic tanks where underground sewers are unavailable, which suits the irregular layouts of most slums.

Toilets only deliver health benefits when they are used, cleaned, and maintained. A toilet that is dirty, unlit, or unsafe at night, especially for women, quickly falls into disuse. So the measure is not just construction but operation and maintenance, often through small user charges that fund cleaning staff and repairs. Solid waste management belongs in the same bracket. Regular collection, waste segregation at source, and composting of organic waste prevent the garbage pile-ups and clogged drains that breed mosquitoes and contaminate water.

Affordable and clean energy 🔗

Energy is the quietly overlooked piece of sanitation. Affordable electricity and clean cooking fuel reduce indoor smoke, allow households to boil water when needed, and make toilet blocks usable after dark through lighting. Lit, ventilated sanitation facilities are used more consistently and feel safer. Decentralised options such as bio-toilets, which convert human waste into biogas, link energy and sanitation directly by turning a disposal problem into a usable resource. Treating energy access as part of the sanitation package, rather than a separate issue, tends to make the whole system more reliable.

Community participation 🔗

Infrastructure built without the involvement of residents often fails. Toilets go unused, taps are damaged, and waste systems collapse because no one feels responsible for them. The most durable sanitation gains come when slum communities are treated as partners in planning, building, and running the systems that serve them.

Local ownership and cleanliness drives 🔗

Community participation works on two levels. First, it surfaces real needs: residents know which lanes flood, where drains block, and what timings make a shared toilet usable. Second, it creates ownership, so that a facility is protected rather than vandalised. Research on integrated, primary-healthcare-based models in urban slums has shown that when community mobilisation is built in, outcomes improve dramatically; one Chennai case study reported that the large majority of families adopted safe garbage disposal and household latrine use, with waterborne disease in children falling significantly. Cleanliness drives such as monthly neighbourhood clean-up days, drain-clearing campaigns, and waste-segregation training help convert one-time infrastructure into everyday habit.

Self-help groups, particularly those led by women, are powerful vehicles for this. Women are usually the primary managers of household water and hygiene, so their participation makes sanitation programmes more grounded and more sustained. Embedding sanitation committees within the settlement, with a clear role in maintenance decisions, keeps momentum going long after the construction crews leave.

Role of NGOs and the private sector 🔗

Improving slum sanitation usually demands resources, technical knowledge, and implementation capacity that exceed what a community or a single municipal department can provide alone. This is where non-governmental organisations and private partners fill critical gaps in funding, design, and delivery.

NGOs as intermediaries and innovators 🔗

NGOs frequently act as the bridge between residents and the state, translating community needs into workable projects and carrying technical know-how into settlements. The best-known Indian example is Sulabh International, which has built well over a million household toilets and operates thousands of community toilet complexes across the country. Sulabh’s contribution was as much technological as social: it popularised a low-cost, twin-pit, pour-flush toilet that needs no sewer line or expensive treatment plant, making safe sanitation affordable in places where conventional sewerage is impossible. Its “pay-and-use” model for public complexes also showed how facilities can fund their own upkeep.

Public-private partnerships for infrastructure 🔗

Partnerships between government bodies, private firms, and community organisations can pool what each does best: public agencies bring policy and land, private companies bring capital and engineering, and NGOs bring trust and grassroots reach. Corporate social responsibility funds can support toilet blocks, decentralised wastewater treatment, or waste-to-compost units, while private operators can be contracted to maintain community toilets to a measured standard. The key is accountability. Partnerships succeed when responsibilities for cleaning, repair, and monitoring are spelled out, so that a shiny new facility does not deteriorate within months. Coordination across health, housing, water, and sanitation departments, with communities as partners, is what turns scattered projects into lasting improvement.

Education and behavioural change 🔗

Even the best toilet and the cleanest water supply will not improve health if hygiene practices lag behind. Behaviour is often the hardest part of the sanitation puzzle, and the part most easily ignored when budgets focus on construction.

Hygiene habits that actually stick 🔗

Studies in northern Indian slums have repeatedly flagged the everyday gaps: a large share of households practise unsafe water storage and handling, and handwashing before eating is far from universal. These are not failures of infrastructure but of awareness and routine. Targeted education on handwashing with soap at critical moments, safe water storage, proper toilet use, and waste segregation can shift these patterns. The crucial point is that a toilet is often seen as a home improvement rather than a health intervention, so behaviour change communication has to connect the dots between daily habits and the diseases they prevent.

Effective behaviour change tends to share a few features. It is repeated rather than one-off, it uses local languages and trusted messengers, and it makes the healthy choice the easy choice. Sulabh’s grassroots campaigns, which used sanitation songs, street awareness, and women as agents of change, illustrate how culturally rooted messaging outperforms generic posters. School programmes are especially valuable, since children carry hygiene messages home and form habits early. Combining education with infrastructure, so that new toilets arrive alongside active hygiene campaigns, produces far better results than either alone.

Bringing the measures together 🔗

No single measure fixes slum sanitation. Safe water without toilets, toilets without maintenance, infrastructure without community ownership, or hardware without hygiene education each falls short on its own. The settlements that see real, lasting change are those where basic amenities, community participation, NGO and private partnerships, and behavioural change advance together and reinforce one another. That integrated approach, backed by national missions and grounded in the daily reality of residents, is what turns a slum from a public health risk into a healthier, more dignified place to live.

What do you think? Which measure do you believe deserves the most investment first in your nearest city: building new infrastructure or changing everyday hygiene behaviour? And how can sanitation systems in slums be designed today to cope with the added stress of climate change, such as heavier flooding and water scarcity?

References

1. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2796770/
2. https://academic.oup.com/jid/article/224/Supplement_5/S573/6433799
3. https://amrut.mohua.gov.in/
4. https://swachhbharaturban.gov.in/
5. https://www.sulabhinternational.org/about-sulabh-international-social-service-organisation-new/
6. https://journals.sagepub.com/doi/abs/10.1177/095624789901100104
7. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10434291/