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A reliable and safe water supply is therefore crucial for the health and quality of life of a city's residents. In addition, water is a limited resource, and many parts of the world are facing water shortages due to population growth, climate change, and other factors.

Water is an essential part of life. Today most of us take that fact for granted. Water inequality is a significant issue, as we're finding ourselves fighting over water as the quality decreases. Water weighs heavy on our minds as the quantity becomes less than we need to sustain our growing population.

The truth is, our cities (and everything in it) depend on water. We all drink it and use it every day. In fact, according to the United States Geological Survey (USGS), about 70% of us drink tap water, and more than half take for granted that we have access to clean drinking water whenever we need it. Unfortunately, we have become so accustomed to this basic necessity that we have failed to notice the strain on ensuring access to clean water and sanitation.

Related reading: Sustainable Fashion in 2026: The Rise of Conscious Consumerism | Building Sustainable Cities: Awaken Resilient and Livable Urban Spaces | Clean Water Organizations: Choosing the Best for Charitable Giving

Where to Start

Did you know that the average American uses more than 100 gallons of water per day? That's a lot of water, and it can be hard to figure out where to start when it comes to reducing your usage.

Luckily, there are plenty of ways to improve water usage without sacrificing life's simple pleasures.


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Here are ten tips for making your city's water supply more sustainable:

  1. Check for leaks in your plumbing system. A tiny leak can waste thousands of gallons of water every year! The average American household loses about 10,000 gallons of water annually through leaky pipes, toilets, and faucets.

  2. Take shorter showers. A full-body shower only needs around 5 minutes to get clean!

  3. Turn off the tap while you brush your teeth or shave. You might think letting your water run while you brush your teeth or wash dishes is a harmless waste, but all those little drips add up over time! If you are not actively using water, turn off the tap completely. A tap running can fill 4 gallons per minute!

  • Don't use a hose to wash your car. Instead, use a bucket and sponge, and turn off the water while you wash your car. Wash your car on the lawn. Then the water will drain back into the ground. Use safe soaps to protect the groundwater and lawn.
  1. Run full loads in the dishwasher and washing machine. You'll use less energy and less water overall!

  2. Install low-flow aerators on all faucets and showerheads in your home. You'll use half as much water without missing out on any comfort! Faucet aerator to reduce flow rate by 25% - 50%

    Sustainable supply depends on financial viability — see our analysis of global water bankruptcy and SDG 6 business strategy for 2026.

  3. Replace older toilets with models that use less than one gallon per flush. They're easy to install yourself! Low-flow toilets use less than 1.6 gallons per flush, significantly less than older models.

  4. Plant trees and gardens around your house so they can absorb rain.

  5. Collect rainwater.

If you live in an area with rainy seasons, consider collecting some of that water in barrels. You can use it later to water your plants and other greenery around the house. It's a great way to ensure your plants stay healthy and vibrant without relying on city water supplies as much!

9. Recycle water in your home. It is easy to recycle water in your home.

  • Save shower water for plants and houseplants
  • Use a bucket under the faucet to catch dripping water

The Basics: Water Sources

Water is the lifeblood of our planet. It sustains every living thing. Therefore, it's important to take care of it and use it wisely. To do this, we need to understand where water comes from and how much of it we use. There are a few basic water sources, and they all have their own advantages and disadvantages.

Here are the most common:

  1. Surface water. This is the most common type of water source for cities. It comes from lakes, rivers, and streams. It can be used as drinking water or for other purposes like irrigation.

  2. Groundwater. This is underground water that seeps into underground aquifers and wells. It's not always clean enough to drink, but it can be used for irrigation or industrial purposes.

  3. Desalination. The process of removing salt from seawater so that it's safe for drinking or other uses.