Skip to main content
The Journal of Global HealthInternational Health JournalEvidence for health where it's hardest to deliver
Vol.
XXIV
No.
04
Year
2026
Menu

Quick Links

ArticlesCommunity ForumContact
Language
Appearance
WASH Infrastructure · Field Guide

Field Sanitation Supplies: Containing Excreta Before It Becomes a Caseload

Global Health Equipment Review·Field Series·Evidence Desk·Peer-reviewed in spirit · Educational

Latrines, desludging hardware, waste segregation, and hygiene-kit composition for field hospitals and displacement settings — the half of WASH that fails quietly, and the half that decides whether a water programme holds.

Talk to the editorial deskBack to the WASH pillar
Plate II
Fig. — field plate
Figure. Engraved reference plate — evaluating equipment on field resilience, not lab-bench ideals.
Why sanitation is half of WASH

Clean water cannot outrun an open latrine

It is tempting to treat sanitation as the junior partner to water treatment — the filter skid arrives first, gets the attention, and the latrines are dug later. In practice the faecal-oral transmission cycle that drives cholera, shigellosis, typhoid and hepatitis E closes at the latrine and the handwashing station far more often than at the tap. A camp can hold a perfect free-chlorine residual at every distribution point and still seed an outbreak if excreta is not contained, separated, and safely removed.

The editorial position we keep returning to is that sanitation hardware and hygiene-promotion supplies belong on the same procurement line as filtration, not in a footnote beneath it. The Sphere framework treats excreta containment and the means to wash hands as minimum standards in their own right — not optional refinements once the water is running. Plan the sanitation supply chain alongside the clinical line, because it is the line that fails without announcing itself.

Read the filtration guide
Review criteriaBy which we judge field gear
01Criterion
1:20
Sphere target ratio of users per latrine (acute phase may start nearer 1:50)
02Criterion
≥30 m
Minimum distance from a latrine to any well or water source
03Criterion
≤50 m
Maximum walking distance from a dwelling to the nearest latrine
04Criterion
1–2 L
Water per user per day budgeted for handwashing at communal latrines
Standards of the desk
Plate II
Fig. — field plate
Figure. Engraved reference plate — evaluating equipment on field resilience, not lab-bench ideals.
The grading lens

What 'field-ready' means for a sanitation system

A latrine slab that meets a catalogue specification is not the same as a sanitation system that survives a wet season in saturated soil with a rising water table. We assess sanitation hardware against the variables that actually fail in deployment: structural stability in poor ground, the realism of the desludging interval before the pit is full, whether the superstructure gives the privacy and safety that determine whether women and girls actually use it after dark, and whether the slab can be cleaned and disinfected without destroying it.

The same discipline applies to consumables. Soap that arrives without a hygiene-promotion plan sits unused; chlorine for surface disinfection in the wrong concentration is either inert or hazardous; a hygiene kit specified for an average household ignores menstrual-health and infant needs that decide whether the kit is used at all. We weigh the whole system — slab, superstructure, desludging route, disinfectant chemistry, and the human protocol around it — rather than the line item.

Our field-equipment review method

The field-sanitation supply chain, end to end

Containment is a chain, and like any chain it is only as strong as the link nobody budgeted for. These are the stages a procurement officer should be staging supplies against from day one.

  1. 01Step

    1 — Excreta containment

    Latrine slabs, pit linings, and superstructures sized to Sphere ratios and sited at least 30 m from any water source and downgradient of it. Emergency-phase trench or raised latrines buy time; the durable, lined, gender-segregated, lockable latrine is the target the supply chain should be converging on, not an aspiration.

  2. 02Step

    2 — Desludging and safe removal

    A pit fills. Plan the emptying before it does: manual or mechanical desludging equipment, sealed transport, and a designated treatment or disposal site clear of the water supply. An uncontained desludge is a cross-connection waiting to happen — the fastest route to a self-inflicted cholera cluster.

  3. 03Step

    3 — Waste segregation

    General refuse, greywater, sharps, and infectious clinical waste each need a separate stream and a separate container colour-coded and understood by staff. Mixing a sharps stream into general refuse, or greywater into a drinking-water path, is where avoidable transmission and injury originate.

  4. 04Step

    4 — Hygiene-kit distribution and promotion

    Soap, jerrycans, menstrual-health items, and where appropriate water-treatment consumables, paired with culturally appropriate hygiene promotion. A kit handed out without the behaviour-change work around it is supplies expended, not transmission interrupted.

Method of review
From the review desk

What a field hygiene kit actually has to carry

There is no universal kit, but a defensible one is built from the same functional components and then adapted to the population's real composition — not the average on a spreadsheet.

  1. 01

    Handwashing and personal hygiene

    Soap in sufficient quantity for daily handwashing and bathing, a means to store and pour water, and the consumables that decide whether handwashing happens at the moments that matter — after latrine use, after cleaning a child, before food.

  2. 02

    Menstrual and infant health

    Menstrual-health materials and infant hygiene items are the components most often cut and most often decisive in whether women and girls can use sanitation safely. A kit that omits them is incomplete, not economical.

  3. 03

    Water handling and treatment

    Covered, narrow-necked storage containers to resist recontamination, and where the supply is not reliably treated, point-of-use consumables — chlorine tablets or a household filter — with the instruction to use them correctly.

  4. 04

    Environmental and vector hygiene

    Surface-disinfection supplies for shared facilities and, where the setting demands it, the means to control the flies and vectors that bridge excreta to food. The kit protects the household; the environmental supplies protect the shared space around it.

ArticleField Series

Why the quiet half of WASH carries the larger share of the data

Sanitation is treated as the junior partner to water treatment far more often than the evidence warrants. Of the diarrhoeal mortality the WHO attributes to inadequate water, sanitation and hygiene — on the order of 829,000 deaths a year — the share assigned to inadequate sanitation alone has been estimated at around 280,000 deaths, sitting alongside roughly 502,000 attributed to unsafe drinking water and a comparable figure for poor hand hygiene. In other words, excreta containment and the means to wash hands are not refinements on a water programme; they are roughly half of the preventable death toll, and they are the half that fails without announcing itself.

The operational ratios that govern that toll are specific and unforgiving. The Sphere framework sets a target of no more than 20 users per latrine, segregated by sex and ideally lockable; a minimum separation of at least 30 metres between any latrine and a water source; and a maximum walking distance of around 50 metres from a dwelling to the nearest latrine, because a latrine people will not reach after dark is, epidemiologically, a latrine that does not exist. A programme that holds a perfect free-chlorine residual at every tapstand and lets these sanitation ratios slip is not protected — it is running one barrier where the disease needs two. We grade sanitation hardware on whether it can actually hold these floors across a wet season, a rising water table, and a desludging cycle nobody budgeted for.

End of section
Correspondence

Queries to the desk

06 entries on file
Q1.How many latrines does a field site actually need?

The Sphere target is roughly one latrine per 20 users, segregated by sex and ideally lockable. In the acute opening phase a site may have to start nearer one per 50 and improve from there — but the trajectory matters: a programme that plateaus at the emergency ratio is rationing dignity and inviting open defecation. Site latrines at least 30 m from and downgradient of any water source, and within about 50 m of dwellings so they are actually used after dark.

Q2.Why budget desludging before the pits are even dug?

Because the pit will fill, and the moment it does, an unplanned emptying becomes the single most dangerous event in the camp's sanitation chain. Desludging equipment, sealed transport, and a disposal or treatment site clear of the water supply have long lead times. Procuring them reactively, after the pits are full, is how a containment system turns into a contamination source.

Q3.What is the most common avoidable sanitation failure?

Cross-connection — a greywater path that meets a drinking-water path, a desludge route that crosses an intake, or a sharps and infectious-waste stream mixed into general refuse. The hardware to prevent it is cheap; the discipline and the segregated containers are what is usually missing. Almost every self-inflicted faecal-oral cluster we read about traces back to a separation that was assumed rather than enforced.

Q4.How does sanitation connect to the rest of the WASH pillar?

Directly and inseparably. Water filtration removes the pathogen from the supply; sanitation stops the pathogen re-entering it. A cholera treatment unit needs both its own safe water and a safe waste route; a refugee-camp hygiene programme is sanitation, water points, and behaviour change run as one system. Treating sanitation as a standalone logistics task — rather than as one half of an integrated WASH line — is the framing error that most often undoes a good water programme. The medical-water-filtration and refugee-camp-hygiene guides cover the other two faces of the same problem.

Q5.How much of the diarrhoeal-disease burden traces to sanitation specifically?

A substantial share. Of the roughly 829,000 diarrhoeal deaths a year the WHO attributes to inadequate water, sanitation and hygiene, around 280,000 have been estimated to stem from inadequate sanitation alone — alongside the larger figure for unsafe drinking water and a comparable one for poor hand hygiene. Sanitation is not a tail risk; it is roughly half the preventable toll, which is why it belongs on the same procurement line as filtration rather than in a footnote beneath it.

Q6.What sanitation supplies are most often cut from a hygiene kit, and why does it matter?

Menstrual-health materials and infant-hygiene items are the components most often trimmed for cost and the ones most often decisive in whether women and girls can use sanitation safely at all. A kit that omits them is incomplete, not economical — the same way a latrine without privacy and a lock is a structure people will not use after dark. We assess hygiene kits on whether they match the population's real composition, not the average on a spreadsheet, because an unused supply prevents no transmission.

From the editorial desk

Specifying sanitation for a deployment?

We evaluate latrine hardware, desludging logistics, waste-segregation systems, and hygiene-kit composition on durability, safe operation, and suitability for the hardest field settings — not the catalogue spec. Bring us the operating context and we will share the editorial assessment.

Contact the editorial desk