It's easy to take the fresh, cold water that gurgles out of your tap each morning for granted. Unfortunately, not everyone has that luxury.

Today is World Water Day, and this year, the theme is "Leaving no one behind." With the goal of ensuring access to fresh water for everyone, World Water Day hopes to draw attention to an issue that impacts the health and livelihood of billions of people around the world.

According to the United Nations, 2.1 billion people don't have access to safely-managed drinking water. In particular, the campaign points to marginalized groups like women, children, refugees, and more, who they say can be ignored or discriminated against when trying to access water.

But there are ways to offer assistance. Organizations on Twitter have a wealth of tools, information, and resources that will show you how to make a difference. Here are seven useful tweets to read, like, and share to understand more about the situation at-hand and what role you can play in mitigating a real crisis.

1. Understand the role of fresh water in agriculture

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2. Learn how much your daily cup costs

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3. Think about the role income plays in water access

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4. Understand the hidden cost of clothing

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5. Know the populations impacted by the water crisis

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6. Consider how water is used in conflicts

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7. Make it personal

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