Water

Collect dew with a bandana

You can collect dew by soaking a clean cloth against wet grass and wringing it into a container. Use this as a supplemental water source when heavy dew is present before sunrise and you can find a clean collection area. The cloth gathers droplets from many blades, but it also picks up contamination from their surfaces. A cup or two may be possible under favorable conditions, but yield varies widely and you should not depend on it for your water supply.

Water 30 min practice Beginner Choose accessible, tall, ungrazed grass with visible dew, usually after a clear, cool night with light wind; sheltered patches may stay wet longer after sunrise. Skip grass near roads, farmland, or animal droppings.

All skills

Topic summary

Key takeaways

The cloth becomes visibly wet from contact with dew-covered blades without dragging on the ground.
Wringing releases water into the container with little visible dirt or plant debris.
Repeated passes produce a noticeable increase in collected water while dew remains.
The collected batch receives appropriate treatment before you drink it.
Avoid: Starting after the grass has dried wastes effort, so check for droplets before dawn and begin while the blades are visibly wet.
Avoid: Assuming ungrazed grass is automatically safe overlooks wildlife and chemical contamination, so inspect the site and avoid questionable areas.

Intended uses

Water skill (Beginner, ~30 min practice)
Requires: Clean bandana or shirt without insect repellent or other chemical treatments, Clean collection container, Metal pot for boiling, Stove or other safe means of boiling water

Climate suitability

Choose accessible, tall, ungrazed grass with visible dew, usually after a clear, cool night with light wind; sheltered patches may stay wet longer after sunrise. Skip grass near roads, farmland, or animal droppings.

Military.com — Collect Dew for Drinking Watch on YouTube

Safety: Treat collected dew as untreated surface water: boiling or an appropriate water-treatment method addresses microbial hazards, but does not reliably remove pesticides or other chemicals. Avoid areas with unknown spraying history, poisonous plants, or irritating vegetation, and do not let collection delay finding a more dependable supply.

Required tools

Clean bandana or shirt without insect repellent or other chemical treatments
Clean collection container
Metal pot for boiling
Stove or other safe means of boiling water

Required materials

Dew droplets on grass
Tall, untreated grass in a clean collection area
Fuel for boiling

Step-by-step

Before dawn, tie a clean bandana or shirt around your calves.
Why: 1. Before dawn, tie a clean bandana or shirt around your calves. Dew is often most available near dawn, and calf-level cloth contacts wet blades as you move; secure it without restricting circulation or leaving loose ends that could trip you.
Walk slowly through tall, ungrazed grass until the cloth is soaked.
Why: 2. Walk slowly through tall, ungrazed grass until the cloth is soaked. Slow movement lets droplets transfer into the fabric while helping you watch your footing; ungrazed grass reduces, but does not eliminate, exposure to animal contamination.
Wring the cloth into a container. Repeat until sun burns off the dew.
Why: 3. Wring the cloth into a container. Repeat until sun burns off the dew. Wringing recovers the captured water and restores the cloth’s capacity to absorb more, while repeated passes make use of the short collection window.
Purify before drinking — dew picks up whatever's on the plants.
Why: 4. Purify before drinking — dew picks up whatever's on the plants. Dew can carry microbes and debris from vegetation, so strain out visible particles if needed and then boil or use a treatment method appropriate for untreated surface water.

Common mistakes

Starting after the grass has dried wastes effort, so check for droplets before dawn and begin while the blades are visibly wet.
Assuming ungrazed grass is automatically safe overlooks wildlife and chemical contamination, so inspect the site and avoid questionable areas.
Using dirty, repellent-treated, or detergent-laden clothing contaminates the collection, so use a clean, thoroughly rinsed, untreated cloth.
Letting the cloth drag through soil adds mud and contamination, so keep it secured above the ground.
Drinking clear-looking dew untreated confuses appearance with safety, so treat every batch before drinking.

Troubleshooting

If the cloth stays nearly dry, then check the blades for actual droplets and move to a wetter, suitable patch or stop.
If the cloth becomes muddy or picks up droppings, then discard that batch and replace or thoroughly clean the cloth before collecting elsewhere.
If wringing produces very little water, then let the cloth become more thoroughly soaked and twist it firmly over the container.
If the water has an unusual odor or oily sheen, then discard it and abandon that collection area rather than trying to make it safe by boiling.

Field practice drill

On a dewy morning, spend about 30 minutes inspecting a suitable patch, securing your cloth, and repeating slow collection passes followed by wringing. Keep the cloth off the soil and note how quickly each pass wets it and how much water accumulates. Finish by treating the collected water and cleaning and drying your equipment; carry drinking water so the practice does not depend on your yield.

Indicators of success

The cloth becomes visibly wet from contact with dew-covered blades without dragging on the ground.
Wringing releases water into the container with little visible dirt or plant debris.
Repeated passes produce a noticeable increase in collected water while dew remains.
The collected batch receives appropriate treatment before you drink it.

Related outdoor skills

Educational reference only. Wilderness conditions change fast — practice in low-stakes settings, take a certified wilderness first-aid course, and confirm regional regulations before you rely on any of these skills in the field.