Every Drop Counts

Why water is important

Water is one of the most important natural resources. All living things — people, animals and plants — need water to live. Water helps our bodies work, keeps food crops growing, cleans things, and keeps the environment healthy.

Main uses of water

• Drinking and cooking — to keep us healthy and alive.
• Personal hygiene — washing hands, bathing and brushing teeth to prevent disease.
• Agriculture — watering crops and feeding animals so that we have food.
• Industry and schools — factories, hospitals and schools use water for many tasks.
• Environment — rivers, lakes and wetlands support plants and animals and help control climate.

How much water is actually available?

Although Earth is mostly covered with water, about 97% is salty sea water. Only a small part (less than 1%) is fresh and easily available for our use. That is why we must save and protect the water we have.

Why we must save water

• Fresh water is limited and not same everywhere — some places have shortages.
• Wasting water makes it harder for farms, people and nature to get enough water.
• Clean water keeps us healthy; pollution makes water unsafe.

How to save water — simple actions

• Turn off the tap while brushing teeth or soaping hands.
• Use a bucket or a mug for bathing instead of filling a tub or long showers.
• Use leftover water for plants (reuse water from washing vegetables).
• Collect rainwater to water gardens (rainwater harvesting).
• Fix leaking taps and pipes quickly.

Small changes by many people add up to a large saving. When we save water, we help life on Earth and make sure there is enough clean water for everyone.

What are sources of water?

Sources of water are the places from where we get water for drinking, bathing, cooking, farming, industry and for nature. There are two main kinds of water sources: surface water and groundwater. Surface water includes rivers, lakes, ponds, reservoirs and the sea. Groundwater is the water stored under the ground in soil and rocks and is brought up by wells and tube wells. Rainwater and glaciers (ice) are also important sources.

Main sources explained:

• Rivers and Streams: Flowing water on the land. They provide water to towns, farms and are used to make electricity (hydropower).
• Lakes and Ponds: Still bodies of water that store freshwater for animals, plants and people.
• Wells and Tube-wells (Groundwater): Water stored below the ground. People draw it up using buckets, pumps or handpumps.
• Rainwater: Water that falls from clouds. It is an important direct source and can be collected for use (rainwater harvesting).
• Glaciers: Huge masses of ice on mountains that melt slowly to feed rivers.
• Sea (Ocean): The largest water body but contains salt and is not drinkable unless treated (desalination).

Freshwater vs Saltwater: About 97% of Earth’s water is saltwater (sea). Only about 3% is freshwater. Most freshwater is locked in glaciers and ice; only a small portion is available in rivers, lakes and underground for people to use. This makes protecting and using water wisely very important.

Why these sources matter: Different places rely on different sources — villages may depend on wells and rain, cities on rivers and reservoirs, farmers on canals and groundwater. Sources can be polluted or dried up, so conserving and recharging them (for example by rainwater harvesting) is crucial.

Short water cycle connection: Water moves from oceans to air (evaporation), forms clouds (condensation), falls as rain (precipitation), flows in rivers or seeps into the ground (infiltration) and returns to the ocean. This cycle keeps water moving between the sources.

What is the Water Cycle?
The water cycle (also called the hydrological cycle) is the continuous movement of water on, above and below the surface of the Earth. It shows how water changes form and moves between the oceans, atmosphere, land and living things. The water cycle has no beginning or end — it keeps going.

Main steps (simple):

1. Evaporation: Heat from the Sun warms water in rivers, lakes, and oceans and turns it into water vapour (a gas). This vapour rises into the air.
2. Transpiration: Plants release water vapour from their leaves into the air. Evaporation + transpiration together are called evapotranspiration.
3. Condensation: As water vapour rises, it cools and changes back into tiny water droplets, forming clouds or fog.
4. Precipitation: When droplets in clouds become large, they fall as rain, snow, sleet or hail back to the ground.
5. Collection / Runoff / Infiltration: Water that falls collects in rivers, lakes and oceans (runoff). Some soaks into the ground (infiltration) and becomes groundwater that plants use or that may later flow into rivers and seas.

Why it matters: The water cycle supplies fresh water for drinking, growing food, and supporting life. It keeps Earth’s climate and ecosystems working. Even though the same water keeps moving, its location and form change.

Simple classroom experiment: Put warm water in a clear bowl, cover with plastic wrap and place ice on top. You will see droplets form (condensation) on the wrap and then fall back (precipitation) — a tiny model of the water cycle.

Groundwater is the water that soaks into the soil and fills the empty spaces (pores) between sand, gravel and rock below the ground. The top level where the ground is saturated with water is called the water table. Groundwater collects in layers of water-bearing rocks or soils called aquifers.

Percolation (also called infiltration) is the process by which rainwater or surface water soaks into the soil and moves downwards into the ground. This is how rainwater becomes groundwater.

How percolation happens (simple steps):

• Rain falls on the land.
• Some water runs off into rivers and ponds.
• Some water is used by plants or evaporates.
• The rest soaks into the soil — this moving down of water through soil layers is percolation.
• Eventually water reaches the water table and fills up the aquifer.

Why groundwater and percolation are important:

• Many people get drinking water from wells and borewells that tap groundwater.
• Plants depend on groundwater between rains.
• Groundwater keeps rivers and lakes flowing during dry periods.

Factors that affect percolation:

• Soil type: sand lets water pass quickly; clay holds water and slows percolation.
• Porosity and permeability: more pores and connected spaces mean faster percolation.
• Vegetation: plant roots help water enter the soil and reduce runoff.
• Slope: steep slopes cause more runoff and less percolation.
• Amount and intensity of rain: heavy rain can cause more runoff; light steady rain helps percolation.

Human effects and conservation: Overuse of groundwater (too many borewells) can lower the water table. Pollution (chemicals, sewage) can contaminate groundwater because percolating water carries pollutants down. Simple ways to help recharge groundwater include building rainwater harvesting systems, recharge pits, small ponds, and avoiding paving large areas so rain can soak in.

Simple classroom experiment: Fill three clear bottles with (a) sand, (b) clay, and (c) gravel. Pour equal amounts of water into each and time how long it takes for water to appear at the bottom or how much disappears from the top after a fixed time. You will see sand and gravel let water pass faster than clay — this shows how soil type affects percolation.

Takeaway: Percolation keeps our groundwater replenished. Protecting surfaces so rain can soak in, and preventing pollution, helps maintain clean water underground for homes, farms and nature.

What is water pollution?

Water pollution happens when harmful substances—like chemicals, waste, oil, plastics or disease-causing organisms—get into lakes, rivers, seas, groundwater or ponds and make the water unsafe for living things and people.

Types of water pollution (simple):

• Physical pollution: visible materials such as plastic bags, glass, soil or oil that make water dirty.
• Chemical pollution: harmful chemicals from factories, pesticides from farms, detergents and acids that change water quality.
• Biological pollution: disease-causing bacteria and viruses from sewage or animal droppings.
• Thermal pollution: when warm water from factories is released into rivers, reducing oxygen for fish.

Causes (simple list):

• Untreated sewage and domestic waste thrown into water bodies.
• Factory wastes and chemicals discharged without treatment.
• Oil spills from ships and leaks.
• Use of pesticides and fertilisers that wash into rivers and lakes.
• Dumping of plastics and non-biodegradable trash.

Effects of water pollution:

• People get sick from drinking or using polluted water (diarrhoea, infections).
• Fish and water animals die or move away, upsetting the food chain.
• Plants near polluted water may not grow well.
• Water becomes unsuitable for farming, bathing, fishing and playing.
• Polluted water lowers the amount of clean water available—Every Drop Counts.

How to prevent water pollution (what students and families can do):

• Do not throw trash into rivers, lakes or drains; use a dustbin.
• Use less plastic; carry a reusable bottle and bag.
• Avoid pouring oil, paint or chemicals into sinks or drains.
• Use natural cleaning products and reduce pesticide use in gardens.
• Participate in local clean-up drives and plant trees along water bodies.
• Tell adults to treat sewage and factory waste before letting it into water bodies.

Short example calculation to show how pollutants concentrate:

If 2 grams of oil spill into 10 litres of water, concentration = 2 g ÷ 10 L = 0.2 g/L = 200 mg/L. Even a small amount can harm fish and plants.

Conclusion: Clean water is limited and valuable. By stopping pollution and saving water, each of us helps protect health, wildlife and our future.

What is water scarcity? Water scarcity means there is not enough clean water available to meet people’s basic needs for drinking, cooking, bathing, farming and industry. It can be temporary (seasonal) or long-term.

Why does it happen?

• Natural causes: Droughts (long periods with little rain) and uneven distribution of rainfall and rivers mean some places get less water. Climate change makes weather patterns less predictable, increasing droughts and floods.
• Human causes: Population growth increases demand for water. Overuse (wasting water at home, in farms and factories) reduces available supply. Pollution from sewage, chemicals and industry makes water unsafe to use. Inefficient irrigation and leaking pipes also cause big losses.
• Land use changes: Cutting forests and paving land reduces groundwater recharge (less water goes back into the ground), so wells can dry up.

Effects of water scarcity include lack of drinking water, poor hygiene and health problems, crop failure and reduced food, conflicts over water, and economic losses for communities.

How we can reduce water scarcity

• Save water at home: turn off taps, use buckets for washing, fix leaks.
• Use water-smart farming: drip irrigation and scheduled watering.
• Harvest rainwater and recharge groundwater (rainwater harvesting pits, recharge wells).
• Treat and reuse wastewater where possible.
• Protect rivers, lakes and forests from pollution and cutting.
• Community rules and government policies to manage and share water fairly.

Summary: Water scarcity is caused by a mix of nature (less rain, climate change) and human actions (too much use, pollution, poor management). Small daily actions and bigger systems (like rainwater harvesting and fixing leaks) help save water for everyone.

Water is precious and limited. Saving water at home helps plants, animals and people — and it saves money. Small habits make a big difference. Below are simple, practical ways families can save water every day and why each method works.

• Fix leaks quickly: A dripping tap or leaking pipe wastes water all the time. Repairing them stops continuous loss.
• Turn off taps when not in use: Close the tap while brushing teeth, soaping hands, or shampooing to avoid unnecessary flow.
• Take shorter showers and use a bucket for bathing: Shorter showers use less water; a bucket lets you control the amount used.
• Use full loads: Run the washing machine and dishwasher only when full to save water per item washed.
• Reuse water where safe: Water used to wash vegetables or rinse rice can be used to water plants (after cooling and straining) or to clean floors.
• Water plants at the right time and smartly: Water early morning or late evening to reduce evaporation; use a watering can or drip methods instead of a hose.
• Collect rainwater: Use a barrel or tank to collect rain for gardening and cleaning.
• Use water-saving fixtures: Install aerators, low-flow taps, and efficient toilet cisterns to reduce flow without losing performance.
• Use a broom instead of a hose: Sweep patios and driveways rather than hosing them down.

Teaching children these habits — and showing how much water is saved — helps form lifelong good practices. Watching simple measurements and charts (for example, the household water meter) can show the real benefit of small changes.

Why conserve water? Water is limited and essential for drinking, cooking, farming and sanitation. Conserving water at school and in the community keeps supplies available, reduces costs, and protects the environment.

How schools can conserve water

• Fix leaks in taps and pipes quickly to stop continuous wastage.
• Install water-saving taps, aerators or push-button taps to reduce flow.
• Use buckets and mugs for cleaning rather than running hoses; collect and reuse wash water for plants where safe.
• Harvest rainwater from school roofs into storage tanks for gardening and toilet flushing.
• Choose water-wise gardens: native plants, mulch and drip irrigation reduce water need.
• Teach students: posters, assemblies and clubs to monitor use and run saving campaigns (turn off taps, shorter handwashing techniques with proper soap use).

How communities can conserve water

• Repair public leaks and bursting pipes quickly; report faults to local authorities.
• Build simple rainwater harvesting systems on homes and public buildings to collect roof runoff.
• Create community water storage tanks, recharge wells and check dams to store and recharge groundwater.
• Promote efficient irrigation for farms (drip or sprinkler) and grouping watering times to reduce evaporation.
• Encourage reuse: use greywater from washing for gardening after simple filtering.
• Plant trees and protect water catchment areas to maintain local rainfall and reduce soil erosion.

How to start a school or community water-saving project

• Measure current use (meter readings or simple flow measurements).
• Identify big uses and wastes (toilets, kitchens, leaks, irrigation).
• Set achievable goals (for example, 20% reduction in 6 months).
• Implement changes: fix leaks, add harvest systems, change habits.
• Monitor results and celebrate savings to keep people motivated.

Benefits: lowered water bills, more water available during dry seasons, healthier gardens and public spaces, and stronger community involvement and environmental awareness.

Simple student activities

• Measure how many litres a tap gives in one minute and calculate daily use if left running.
• Collect rain from a small roof during a shower to see how much can be saved.
• Count dripping drops and calculate litres lost per day (good lesson in units and multiplication).

What is Rainwater Harvesting?

Rainwater harvesting (RWH) is the process of collecting and storing rainwater for later use or for recharging groundwater. Instead of letting rainwater run off and waste, we capture it from roofs, roads or open spaces and use it for drinking (after treatment), gardening, cleaning, or to refill wells and aquifers.

Why is it important?

• Helps save water and reduces dependence on other water sources.
• Recharges groundwater, raising the water table and helping wells and borewells.
• Reduces flooding and soil erosion by slowing down runoff.
• Is simple and cost-effective—especially useful in places with irregular rainfall.

Types of local rainwater-harvesting measures

• Rooftop harvesting: Rainwater from roofs is collected through gutters into storage tanks or filtered into recharge wells.
• Recharge pits / percolation pits: Small pits filled with gravel and sand where runoff water is directed so it can soak into the ground.
• Recharge wells: Deep holes that direct water to lower soil layers and aquifers.
• Check dams and bunds: Small barriers across streams that slow water flow, letting it seep into the ground.
• Surface runoff harvesting: Directing water from roads or fields into ponds or tanks.

Local water-saving measures (simple actions anyone can take)

• Fix leaking taps and pipes promptly.
• Use buckets for bathing and collect the leftover water for plants.
• Use mulching and drip irrigation in gardens to reduce evaporation.
• Plant trees and shrubs—roots help water soak into the soil.
• Use watertight containers or drums to store rainwater for household use.

How a simple rooftop system works

1. Rain falls on the roof. 2. Gutters collect the water and carry it through a pipe. 3. A first-flush device or mesh removes leaves and dirt. 4. Water goes into a storage tank for later use or into a recharge pit/well to refill groundwater.

Safety and maintenance

• Cover storage tanks to prevent mosquitoes and contamination.
• Clean gutters and first-flush filters regularly.
• Use simple filters or chlorination if rainwater is used for drinking—follow local health guidelines.

What is safe drinking water?
Safe drinking water is water that is clean and free from germs (bacteria, viruses), harmful chemicals and dirt. We can drink it without getting sick.

Why is it important?
Our body needs water to stay healthy. Drinking dirty water causes stomach infections, diarrhoea and other illnesses. Every drop counts — using water carefully and keeping it clean protects health and saves water for everyone.

Sources of drinking water

• Rainwater
• Wells and handpumps
• Rivers and ponds
• Tap water supplied by the town

Common contaminants
Dirt and sand, germs (microorganisms), and some chemicals (salt in groundwater, industrial waste).

How do we make water safe? (Simple purification methods)

1. Filtration: Remove visible dirt by passing water through a clean cloth or sieve. For better results, use a sand-and-gravel filter to trap fine particles.
2. Boiling: Boil water for 1–3 minutes (longer at high altitudes) to kill germs. Let it cool and store in a clean covered container.
3. Solar disinfection (SODIS): Fill clear PET bottles and keep them in direct sunlight for 6 hours (or 2 days if cloudy). Sunlight kills many germs.
4. Chemical disinfection: Use household chlorine (bleach) or chlorine tablets following safe dosage instructions to kill germs. One way to think of dosage is using very small amounts so water tastes slightly of chlorine but is safe.
5. Coagulation and settling: Adding a small amount of alum (used by trained operators) helps dirt settle so clear water can be poured off.
6. Boiled or filtered storage: Always store treated water in clean, covered containers and use a ladle or tap to take water out — don’t dip dirty hands into the water.

Practical safety tips
Keep drinking water separate from waste, cover water containers, clean storage vessels regularly, and wash hands before handling water or food.

How children can help
Save water when brushing teeth, repair leaking taps, remind family to boil or cover water, and help collect rainwater.

Water is very important for growing crops. Farming uses a large part of the water we take from rivers, lakes and underground. If we use water carefully in agriculture, we can grow enough food and save water for the future. Here are simple and effective methods farmers use to save water:

• Drip irrigation: Small pipes with tiny holes deliver water directly to the plant roots. This reduces evaporation and water run-off, so plants get water where they need it most.
• Sprinkler irrigation: Water is sprayed like rain over the crop. It uses less water than flooding fields and is good for many types of crops and lawns.
• Mulching: Covering soil with straw, leaves or plastic keeps moisture in the soil and reduces the need for frequent watering.
• Irrigation scheduling: Watering at the right time (early morning or evening) and only when plants need it reduces loss by evaporation and saves water.
• Rainwater harvesting: Collecting and storing rain in tanks, ponds or percolation pits helps farmers use rain for irrigation instead of fresh pumped water.
• Soil improvement and organic matter: Adding compost or manure makes soil hold more water, so plants stay healthy with less irrigation.
• Contour farming, terracing and check dams: On slopes these methods slow down water flow, let water soak into the ground, and prevent soil erosion.
• Crop choice and crop rotation: Growing drought-tolerant crops or rotating crops to suit seasons reduces the total water needed.
• Alternate wetting and drying (AWD) for rice: Letting paddy fields dry a little between waterings reduces water use without much loss in yield.

All these methods help farmers use water efficiently, increase yields, and protect groundwater and rivers. Simple practices like mulching, fixing leaks in canals, and teaching farmers how much and when to water can make a big difference.

Water is precious. "Role and Responsibilities" means what each person, family, school and government must do to save water and use it wisely. If everyone does small things every day, we can protect water for the future.

Why it matters:

• Fresh water is limited. We need it for drinking, cooking, farming and cleaning.
• Wasting water can cause shortages, make water more expensive, and harm plants and animals.

Who has responsibilities and what they can do:

• Students: Turn off taps while brushing, use a mug to rinse, report leaks at school, use a broom to clean school yards instead of a hose.
• Families: Fix dripping taps, collect and reuse wash water for plants, take short baths or use a bucket, reuse leftover drinking water for watering plants (if safe).
• Schools: Teach water saving habits, install water-saving taps, repair leaks quickly, collect rainwater in tanks and use it for gardens.
• Community: Organise clean-up drives for ponds and wells, share water-saving tips, set rules for fair water use in dry seasons.
• Government and local bodies: Build and maintain pipes, provide water bills and meters, promote rainwater harvesting, protect rivers and groundwater from pollution.

Simple everyday actions add up. If each child saves even one litre while brushing, many children together save hundreds of litres each day. That is the power of responsibility.

Classroom activities and experiments help students understand how precious water is and how easily it can be wasted or saved. Simple hands-on experiments make ideas from the chapter “Every Drop Counts” clear: how much water we use, how leaks add up, how filtration and evaporation work, and which actions save water.

Below are safe, easy activities you can do in class or at home. For each experiment we list materials, steps, what to observe, and what the results tell us.

1. Measure a dripping tap (drip-loss experiment)
   Materials: small container (measuring cup), stopwatch or watch with seconds, pencil and paper.
   Steps: Place the container under the tap. Count drops or start the stopwatch and collect water for a fixed time (for example 10 minutes). Measure the volume collected in millilitres (ml).
   Observation & conclusion: Use the volume and time to find flow rate and estimate daily loss. Even a slow drip can waste litres in a day — this shows why fixing leaks is important.
2. Home water audit (activity-wise measurement)
   Materials: jug or measuring container, list of common activities (brushing, washing hands, bucket vs tap, flushing, dishwashing), a helper.
   Steps: For each activity, measure how much water is used (e.g., how many litres to fill a bucket, volume used when brushing with tap on, or water used per flush if possible). Record values.
   Observation & conclusion: Create totals and averages to learn which activities use the most water and where to save (shorter showers, using a mug to rinse when brushing, full loads for washing machine/dishwasher).
3. Filtration experiment (make a simple filter)
   Materials: plastic bottle cut in half, cotton, sand, fine gravel, activated charcoal (optional), dirty water.
   Steps: Invert the top half of the bottle to make a funnel. Layer cotton, sand, charcoal (if available), and gravel. Pour dirty water and collect filtered water in the bottom half.
   Observation & conclusion: Water will look clearer but may still need proper treatment to be drinkable. This shows how filtering removes visible dirt and is the first step in cleaning water.
4. Transpiration experiment (plant water loss)
   Materials: potted plant or branch with leaves, clear plastic bag, string.
   Steps: Cover a few leaves with a clear plastic bag and seal the bag around the stem. Leave for several hours or a day.
   Observation & conclusion: Water droplets will form inside the bag — this demonstrates transpiration (plants release water vapour). It explains one part of the water cycle and why plants need water.
5. Evaporation and surface area test
   Materials: same volume of water in shallow tray and narrow tall glass, marker, stopwatch or clock.
   Steps: Put the two containers in the sun or warm place. Mark starting level and check how much water remains after a set time (several hours).
   Observation & conclusion: Water in the shallow tray evaporates faster due to larger surface area. This explains why puddles dry faster than water in deep containers and how evaporation contributes to water loss.
6. Save-a-drop challenge (behaviour experiment)
   Materials: chart for each student/family to record simple changes (turning off tap while brushing, using bucket for bathing, fixing leaks).
   Steps: Track changes and measure water use before and after one week.
   Observation & conclusion: Small behaviour changes add up — students see real savings and learn the value of habits.

Safety note: Do not drink filtered classroom water without proper treatment. For experiments involving plants or heat, use adult supervision.