Group and long-term austere sanitation

When municipal water and waste infrastructure fails, a group of ten people generates roughly 15–20 pounds (7–9 kg) of food waste and uses 2–4 gallons (7.5–15 L) per person per day for minimal hygiene — even before sanitation failures trigger disease cascades. Per WHO/UNICEF WASH guidelines and Sphere Handbook 2018 standards, inadequate handwashing alone accounts for a substantial portion of diarrheal disease burden in disrupted-infrastructure settings. The good news is that the basic interventions are inexpensive and learnable before an event.

This page covers the five interlocking sanitation domains for groups of 10 or more under multi-week disruption: handwashing without running water, food-prep surface sanitation, solid waste segregation, disease-vector control, and group hygiene rotation. Each domain is a procedure, not advice — because in a prolonged disruption, letting any one of them slip sets off the others.

Action block

Do this first: Set up a dedicated handwashing station (pour jug + soap + waste basin) between the latrine and food-prep area — this single placement eliminates the most common fecal-oral transmission route (20 min) Time required: Active: 20 min station setup; 30–45 min/day maintenance for a 10-person group; recurrence: daily Cost range: inexpensive (household bleach, soap, repurposed jugs, four labeled bins); affordable if purchasing dedicated tippy-tap hardware or lidded waste bins Skill level: beginner for daily operation; intermediate for managing a gastrointestinal outbreak or vector escalation Tools and supplies: Tools: measuring spoons, pour jug or tippy-tap vessel (1–2 L (1–2 qt)), test strips for chlorine concentration verification. Supplies: unscented 5–9% household bleach, liquid or bar soap, four labeled waste bins with lids, printed daily hygiene schedule (laminated preferred). Safety warnings: See High-criticality topic below — fecal-oral disease transmission can escalate rapidly in groups without running water

Educational use only

Food safety procedures carry risk if performed incorrectly. This page is for educational purposes only. Follow current guidelines from official food safety authorities. Use this information at your own risk.

High-criticality topic

Foodborne illness and fecal-oral disease transmission can kill in austere conditions, particularly in elderly, pediatric, and immunocompromised members. The guidance here reflects WHO/UNICEF WASH and CDC handwashing standards, but it does not replace assessment of your specific water source, waste situation, or group health profile. Escalate any suspected outbreak (≥2 group members with concurrent diarrhea or vomiting) to medical triage immediately.

Before you start

Skills: Ability to mix dilute bleach solutions without contaminating eyes or skin (see Choosing a method below). Familiarity with your group's health status — food handlers with active vomiting, diarrhea, jaundice, or open sores on hands must be excluded from food preparation per CDC food handler exclusion guidelines. Ability to identify and eliminate standing water sources. See water storage for potable water quantity requirements and composting toilets for solid human-waste routing.

Materials: Minimum 20 liters (5 gallons) of potable water per person per day for drinking + hygiene per Sphere Handbook 2018 Indicator 1.1 (absolute emergency floor is 15 L (3.9 gal) per day). Unscented household bleach (5–9% sodium hypochlorite). Liquid soap or bar soap. Measuring spoons. Four labeled waste receptacles with tight-fitting lids. At least one 1–2 liter (1–2 qt) tippy-tap jug or equivalent pour vessel.

Conditions: Handwashing station positioned between latrine and food-prep area — never downstream of the latrine. Latrine or composting toilet sited at least 100 feet (30 m) from any drinking water source and at least 165 feet (50 m) from any surface water per Sphere Handbook 2018 WASH Standard 2. Waste streams established before they are needed, not after the first illness.

Time commitment: 30–45 minutes per day for a 10-person group maintaining all five domains once the system is set up. Initial system setup: 2–3 hours. Sanitation officer rotates every 24–72 hours.

Use this when:

Your group lacks running water for 48 hours or more
You are managing shared cooking and eating in a group of 3 or more
You are co-located with elderly, pediatric, or immunocompromised members
Any group member has recently had a gastrointestinal illness

Do not use this page as your sole reference when:

You are dealing with confirmed cholera, hepatitis A, typhoid, or dysentery — those require disease-specific water chlorination levels and case-isolation protocols beyond this page's scope
Your latrine or composting toilet system has already failed (backed up, flooded, or overfull) — route to emergency siting and construction before resuming this protocol

Stop and escalate if:

Two or more group members develop concurrent diarrhea, vomiting, or fever within 24 hours — possible foodborne outbreak; suspend shared food preparation immediately
Any group member develops bloody diarrhea, severe abdominal cramps, or high fever (above 101.5°F (38.6°C)) — route to medical assessment
Visible standing water is accumulating faster than you can eliminate it in the immediate living area — mosquito breeding risk becomes significant within 7–10 days

Handwashing without running water

Soap-and-water handwashing removes more pathogens than any other single intervention in an austere group setting. A tippy-tap — a hands-free pour jug rigged so a foot lever tips it — uses roughly 0.5 liters (0.5 qt) per wash, compared to 2 liters (2 qt) for tap washing, extending your water supply without sacrificing technique.

The five-step technique works regardless of which method you use below:

Wet both hands with a small pour — approximately 30 mL (1 oz), enough to fully wet palms, back of hands, and between fingers.
Apply soap or the equivalent agent. Lather thoroughly, working the agent between fingers, under fingernails, and around the wrists.
Scrub for at least 20 seconds. Use a mental count or hum a 20-second interval. Friction is the mechanical key — the scrubbing dislodges organisms the agent alone cannot reach.
Rinse with a second small pour — approximately 50 mL (1.7 oz) — until no soap film remains. Let rinse water fall into a waste basin, not the ground immediately around the station.
Air-dry or use a single-use paper towel. Shared cloth towels are a direct fecal-oral transmission route — never use them in a group sanitation context.

Mandatory handwashing trigger events (all group members, no exceptions):

Before touching food or food-prep surfaces
After using the latrine or composting toilet
After handling any waste or soiled material
After contact with any ill person
Before and after wound care

Choosing a handwashing method

Four methods are available depending on your supply situation. Each has specific limitations that determine when it is appropriate.

Method	Prep and dose	Key limitation	Use when
Alcohol gel ≥60%	Apply 2–3 mL (0.5 tsp) to palm; rub until dry (20 sec)	Ineffective against norovirus and C. diff; does not remove visible dirt; flammable near open flame	Hands are visibly clean; quick hygiene between tasks; no water available
0.05% chlorine solution (dilute bleach)	1 part 5% bleach to 99 parts water — approximately 3 tablespoons (45 mL) of 5% bleach per 1 gallon (3.8 L) water, or 1 tablespoon (15 mL) per quart (1 L); make fresh daily	Skin irritation with repeated use; degrades quickly in sunlight; not a substitute for soap-and-water friction	High-volume use; surface pre-rinse before soap washing; water is scarce
Boiled water + soap	Cool boiled water to warm; proceed with 5-step technique above	Requires fuel; takes advance planning; water must cool to usable temperature first	Active norovirus or respiratory outbreak in group (alcohol gel fails); any food handler before meal prep
Ash-and-water mechanical scrub	Collect dry wood ash (not charcoal ash); wet hands, apply ash, scrub for 30 seconds, rinse thoroughly	Poor against viruses; abrasive with repeated use; effectiveness limited to mechanical removal; WHO notes this as secondary and inferior to soap	No soap available; soap exhausted; last resort only

Field note

The 0.05% chlorine solution and the 200 ppm food-surface solution look identical but are not interchangeable. Keep two clearly labeled bottles. The handwashing dilution (0.05% = ~3 tablespoons of 5% bleach per gallon, or 1 tablespoon per quart) is roughly 2.5× stronger than the surface-sanitizing dilution (200 ppm = 1 tablespoon of 5% bleach per gallon). Mixing them up gives you either a skin irritant on hands or an undertreated food surface — both fail their job.

Critical note on alcohol gel and gastrointestinal outbreaks: Per CDC norovirus guidelines, alcohol-based hand sanitizers cannot penetrate the protein capsid of norovirus and are therefore ineffective in an active norovirus outbreak. If two or more group members have concurrent vomiting or diarrhea of unknown cause, switch all food-handler hygiene to boiled water + soap immediately and treat the outbreak as potentially norovirus until proven otherwise.

Food-prep sanitation

A single infected food handler can contaminate meals for an entire group. The five-point food-prep sanitation system below applies regardless of cooking method or fuel source.

Designating a food handler:

Each meal, designate one primary food handler. That person washes hands (boiled water + soap, 5-step technique) before touching any food or utensil.
Any group member with active vomiting, diarrhea, fever, jaundice, or open sores on hands is excluded from food handling until 48 hours symptom-free per CDC food handler exclusion guidance. This is not optional during an extended event — contaminated group meals are the fastest route to a full-group illness cascade.
Designate a second "runner" who handles utensils and plates without touching raw food. This separates raw-food contact from service contact.

Surface sanitizing — mixing the 200 ppm solution:

Start with clean water at room temperature. Hot water degrades chlorine faster.
Add 1 tablespoon (15 mL) of unscented 5–9% household bleach per 1 gallon (3.8 L) of water. This yields approximately 200 ppm available chlorine, the regulatory standard per USDA guidance on food-contact surface sanitizing.
Mix solution in a labeled container. Do not use scented bleach — fragrance additives interfere with sanitizing efficacy.
Make fresh solution daily. Chlorine concentration drops 50% within 24 hours of mixing, faster in sunlight or warm environments.

The four-step surface cleaning sequence (before each meal prep and after):

Remove all visible food debris from the surface with a scraper or damp cloth.
Wash the surface with soapy water and a scrub cloth.
Rinse with clean water to remove soap film. Soap residues neutralize the chlorine sanitizer.
Apply 200 ppm chlorine sanitizer solution with a clean cloth or spray. Allow to air-dry for at least 2 minutes. Do not wipe off.

Cutting board discipline:

Designate one board for raw animal protein (meat, poultry, fish, eggs) and a separate board for ready-to-eat foods (vegetables, bread, cooked foods).
If only one cutting board is available, complete all raw-protein cutting first, run the full four-step cleaning sequence, then proceed to ready-to-eat prep.
Mark boards permanently with a permanent marker or paint edge — in a group setting, verbal identification fails under task pressure.

Temperatures and food safety:

Cook all animal protein to safe minimum internal temperatures: poultry to 165°F (74°C), ground meat to 160°F (71°C), whole cuts to 145°F (63°C) with a 3-minute rest, per USDA FSIS safe minimum internal temperatures.
Do not leave cooked food at temperatures between 40°F and 140°F (4–60°C) for more than 2 hours. In a group setting without refrigeration, serve hot food immediately and discard leftovers that have been in the temperature danger zone.
Without a thermometer, use the visual and time cues your cooking method provides — but invest in a probe thermometer as part of your preparedness kit. A probe thermometer is inexpensive and weighs less than 1 oz (28 g).

Tools and substitutes

Ideal tool	Specs / sizing	Field-expedient substitute	Notes / limits
Tippy-tap station	1–2 L (1–2 qt) jug, foot-lever rope rig	Any clean pour jug or pitcher held by a second person	Foot-lever design conserves water and keeps hands free; partner-pour works but requires cooperation
Chlorine test strips	50–200 ppm range	None — no reliable substitute	Strips are inexpensive; skip them only if you are measuring carefully by the tablespoon-per-gallon formula
Probe thermometer	Instant-read, min 120–220°F (49–104°C) range	None for meat-doneness verification	Visual cues (juices run clear, flesh color change) are not reliable for food safety
Lidded waste bins × 4	5-gal (19 L) each; tight-fitting lids	Any container with a closeable top (buckets, bags clipped shut)	The lid matters more than the bin; open waste bins attract flies within minutes
Dedicated cutting boards × 2	Non-porous; separate by color or marking	Single board with full sanitizing sequence between uses	One-board workflow adds 5–10 min per meal; acceptable if discipline holds
Bar or liquid soap	Standard household soap; unscented preferred	Ash-and-water mechanical scrub as last resort	Soap + friction removes norovirus; ash removes some bacteria mechanically but not reliably against viruses

Waste segregation

Solid waste that is not segregated and contained becomes a disease vector within 24–48 hours in warm weather. Flies breed in organic waste in under 12 hours in hot conditions. Rodents locate food waste by scent within hours after dusk in most inhabited areas.

The four-stream system:

Stream	What goes in	Disposal method
Compostable	Food scraps, vegetable peels, coffee grounds, eggshells, paper napkins	Hot compost pile sited ≥100 ft (30 m) from dwelling; see composting toilets and waste for pile management. Cover each layer of food waste with 2 parts brown material (dead leaves, straw, sawdust)
Burnable	Dry paper, cardboard, clean wood, non-food-contaminated packaging	Burn pile or barrel; never burn plastics, treated wood, aerosol containers, or food-soiled material — toxic smoke
Recyclable	Clean glass, metal cans, hard plastics — rinsed	Storage for later disposal or trade; in extended events, clean glass and metal become valuable containers
Hazardous	Batteries, aerosols, sharps, medications, soiled wound dressings, feminine hygiene products	Sealed heavy-duty bag or bucket with lid; never burn or compost; bury at least 18 inches (45 cm) deep away from water sources when no other option exists

Operating rules:

Label all four bins clearly and visibly before the first use. Verbal labeling fails under stress and with newcomers.
Post a one-page visual reference near each bin showing which items go where. A handwritten card in waterproof marker takes 5 minutes and prevents weeks of contamination.
Empty food-waste bins at least every 24 hours in warm weather (above 60°F / 16°C). In hot conditions (above 80°F / 27°C), empty every 12 hours or sooner.
Never leave food scraps uncovered overnight. Rodent activity peaks in the 3 hours after dusk and 3 hours before dawn.
Greywater — soapy water from washing and cooking — routes separately. Pour it into a greywater drain or soak pit at least 30 feet (10 m) from any sleeping area. Do not pool it near the living area. See greywater management for soak-pit construction and sizing for group use.

Field note

The hazardous waste bin is the one most people undersize. In a group of 10 with any wounded or chronically ill members, soiled dressings accumulate faster than expected. Start with a 5-gallon (19 L) bucket with a lid. Label it in large text. Assign one person to manage it. Burn-the-hazardous-waste improvisation creates toxic exposure — the lid and the segregation are the control, not the heat.

Disease-vector control

Standing water, open food waste, and dark humid sheltered areas are the three conditions that sustain vectors. Eliminate all three and most vector problems do not start. Let any one of them persist for 7–10 days and you have a breeding population that requires effort to suppress.

Mosquito source reduction (primary method — works within 24–72 hours):

Conduct a twice-daily walk of the living area perimeter — at dawn and at dusk. Look for any standing water in containers, tarps, tire tracks, overturned lids, clogged gutters, and low-lying ground.
Empty every found container completely. Invert it or punch a hole so it cannot re-accumulate water.
Any container that must hold water (water barrels, cisterns, rain-collection vessels) needs a tight-fitting lid or fine mesh screen — mosquitoes can breed in as little as 1/4 inch (6 mm) of standing water.
For ground depressions that collect rain water and cannot be emptied, fill with sand or gravel to disrupt the standing-water surface.
A batch of larvae can mature to adults in 7–10 days. Once you see larvae (small wriggling dark threads at the water surface), treat the container with a physical flush and dry — do not wait.

Fly exclusion:

Flies are your primary fecal-oral bridge between the latrine and the food-prep area. The 20-foot (6 m) gap between latrine and kitchen is not enough if fly populations are established — cover all food during preparation and storage.
Cover latrine pits with a fitted cover when not in use. A simple board sized to the opening works. The cover breaks the visual + odor cue flies use to locate the waste.
Dispose of food waste in sealed containers within 2 hours of generation. A fly can locate exposed organic material within minutes and lay eggs in under 5 minutes of access.
Sticky fly traps (inexpensive) placed near waste bins and latrine entrances reduce fly populations without pesticides. Reposition traps every 3–5 days to maintain attractiveness.

Rodent exclusion:

Store all food in hard-sided sealed containers. Rodents can chew through plastic bags, cardboard, and thin plastic bins in minutes. Metal cans, glass jars, and hard-sided storage totes with locking lids are the minimum bar.
Clean food-prep surfaces and eating areas immediately after each meal. Crumbs and grease are sufficient to sustain a rodent population.
Seal or block all gaps larger than 1/2 inch (12 mm) in walls, floors, and entry points. Mice can pass through a hole the diameter of a pencil.
Snap traps, placed along walls (rodents run walls, not open areas) and checked daily, are more effective than poison in a group living setting where secondary poisoning is a risk.
If a rodent is found in the food supply, treat all contaminated food as discarded — rodent urine and droppings carry hantavirus, leptospirosis, and salmonellosis.

Tick and ectoparasite control in group settings:

In tick-active areas (tall grass, brush, wooded areas), assign daily tick checks for all group members who go outside. Check scalp, armpits, groin, behind knees, and behind ears. A tick requires 24–36 hours of attachment to transmit most tick-borne diseases — daily checks break this window.
Lice and scabies spread through shared clothing, bedding, and close contact. If one group member is diagnosed, treat all shared fabric items simultaneously. Isolate affected member's bedding. Permethrin-treated clothing and bedding is an affordable preventive in high-exposure settings.
Head-to-toe inspection during the daily hygiene rotation (see below) catches ectoparasite infestations early, when they are manageable.

Group hygiene rotation

Ten people sharing a hygiene system without a rotation schedule creates three predictable failures: equipment overuse concentrates at certain times, high-maintenance members (children, elderly, ill) get deprioritized, and no one feels responsible for the sanitation officer role. A rotation assigns accountability.

The daily schedule template (10-person group, adapt to your context):

Time slot	Activity	Responsible	Notes
Dawn	Mosquito water check + waste bin check	Rotating sanitation officer	Empty bins before flies peak; check for standing water
Morning	Handwashing station refill	Rotating pair	Replace pour-jug water; verify soap supply
Before each meal	Food handler designation + surface sanitizing	Day's designated cook	No exceptions; see food-prep sanitation above
Midday	Latrine/composting-toilet check	Rotating sanitation officer	Cover secure; no overflow; add bulking material if needed
Afternoon	Tick checks for outdoor workers	Self-check + buddy check	Especially after vegetation contact
Evening	Bathing rotation	By assigned day (see below)	Sponge bath minimum; full wash as water allows
Before sleep	Latrine cover secured; food stored	Sanitation officer	No food left exposed overnight

Bathing rotation (water-minimal protocol):

Without running water, full daily showers are not feasible. The minimum hygiene bar per US Army field hygiene doctrine (FM 4-25.12, Unit Field Sanitation Team) is a body-wipe or sponge bath covering the face, hands, armpits, groin, and feet — the five areas where bacterial accumulation causes odor, skin breakdown, and infection risk.

Each group member fills a basin with approximately 2 liters (0.5 gal) of warmed water — just enough for a sponge bath.
Assign bathing days by person, rotating through the group. A group of 10 splits easily into two bathing groups on alternating days.
Keep an eye on skin folds and feet. In prolonged wet or sweaty conditions, fungal infections (ringworm, athlete's foot, jock itch) develop in 72–96 hours without a minimum of hygiene at those sites. Treat with antifungal powder or cream at the first sign of itching or rash.
Children and elderly members have priority access to warm water during cold conditions — hypothermia risk and skin breakdown risk are higher.

Laundry rotation:

Prioritize undergarments, socks, and towels — these carry the highest microbial load per surface area.
In a group of 10, a simple schedule of two loads per day (morning and evening) keeps pace with basic laundry accumulation.
Wash with boiled or potable water and soap. Rinse twice. Dry in direct sunlight when possible — UV exposure reduces surface bacterial load.
Soiled wound dressings, feminine hygiene products, and incontinence materials go into the hazardous waste stream immediately — never into the laundry pile.

Designated sanitation officer model:

The sanitation officer role rotates every 24–72 hours among all able-bodied adult and older adolescent members. The officer is responsible for:

Checking and restocking the handwashing station at start and end of each day
Emptying waste bins and verifying correct segregation
Running the dawn mosquito-water check
Posting the daily hygiene schedule and assigning bath/laundry turns
Being the first point of contact if any group member develops gastrointestinal symptoms

This model distributes both the labor and the accountability. A single person managing sanitation for a group of 10 burns out within days; rotating the role prevents both burnout and skill atrophy in the non-officers.

Field note

Print the sanitation schedule before you need it. Laminate it or seal it in a zip-lock bag. In a group setting under stress, verbal instructions erode — someone always remembers a different version of what was agreed. A physical posted schedule removes "I didn't know it was my turn" as an option. It also makes it easier to onboard new group members without re-briefing the entire protocol from scratch.

Failure modes

Failure	How it starts	Recognition sign	Recovery
Gastrointestinal outbreak from inadequate handwashing	Group uses alcohol gel only during a suspected norovirus event; food handler skips hand hygiene once	2+ members with concurrent diarrhea or vomiting within 12–24 hours	Switch all food-handler hygiene to boiled-water + soap immediately; suspend shared food prep; initiate individual food service; isolate ill members from food prep
Cross-contamination via shared towel	Single cloth towel remains at handwashing station for multiple users	No immediate sign — outbreak appears 24–48 hours later as gastrointestinal illness	Remove all shared cloth towels immediately; replace with single-use paper towels or air-dry; decontaminate station
Surface sanitizer drift (under- or over-concentration)	Solution made by estimation, not measurement; old solution reused after 24 hours	No immediate sign; outbreak evidence only	Discard and remake fresh solution daily using measured tablespoon-per-gallon formula; verify with test strips if available
Rodent infestation from open or thin-walled food storage	Overnight food scraps left exposed; plastic bags used for food storage	Droppings near storage area; gnaw marks on bags or boxes	Hard-sided sealed storage immediately; snap traps along walls; discard any food with visible rodent contact; inspect all storage containers
Mosquito breeding in water containers	Water barrels uncovered; tarps pooling water; low spots in ground unmonitored	Visible larvae at water surface (small wriggling dark threads)	Flush and dry all containers; invert or screen all water-holding vessels; cover cisterns; treat remaining containers per source-reduction steps above
One-person-ill no-isolation cascade	Ill person continues food-handling or shares utensils because group is short-staffed	Second group member falls ill within 12–24 hours with similar symptoms	Enforce 48-hour symptom-free exclusion regardless of staffing pressure; assign food-handler replacement; treat all utensils the ill person used as contaminated
Waste stream collapse (all waste merged)	High-stress period; "just this once" shortcuts; new group member unfamiliar with system	Bins overflowing into wrong stream; fly population spike within 48 hours	Re-sort bins; re-brief all group members; designate a sanitation officer to actively supervise for 48 hours; post new visual chart

Group hygiene quick-start checklist

With handwashing and food-prep sanitation locked, the next most-leveraged layer is the sanitation infrastructure underneath the group — composting toilets covers latrine construction, pile management, and urine diversion for groups without flush plumbing. For the water side, water storage and rotation provides the daily volume math and container-selection guidance that makes the 20 L per person per day target achievable. Groups managing any infectious illness concurrent with austere sanitation should review infection control for case isolation, personal protective equipment, and escalation criteria.

Sources and next steps

Last reviewed: 2026-05-23

Source hierarchy:

Sphere Handbook 2018 — WASH Standards (Tier 1, international humanitarian standards body)
CDC — Guidelines for Personal Hygiene During an Emergency (Tier 1, federal public health)
CDC — Norovirus Infection Control Evidence Review (Tier 1, federal public health)
USDA — How Do You Sanitize Surfaces? (Tier 1, federal food safety)
USDA FSIS — Safe Minimum Internal Temperatures (Tier 1, federal food safety)

Legal/regional caveats: Waste-burning regulations vary significantly by jurisdiction — many states and municipalities restrict or ban open burning; check local ordinances before establishing a burn pile. Greywater disposal regulations vary by state; consult greywater management and local health department guidance. Latrine siting distances are humanitarian emergency standards; AHJ (authority having jurisdiction) may have different requirements for permitted permanent installations.

Safety stakes: high — significant harm possible if procedures are performed incorrectly.

Next 3 links:

→ Composting toilets — solid human-waste routing for groups without flush plumbing
→ Water storage and rotation — daily volume planning to achieve the 20 L/person/day WASH floor
→ Infection control — case isolation and PPE protocols when a gastrointestinal illness is already active in the group (cross-Foundation)