When is water safe to drink? - Mia Nacamulli

Water is refreshing, hydrating, and invaluable to your survival. But clean water remains a precious and often scarce commodity – there are nearly 800 million people who still don’t have regular access to it. Why is that? And how can you tell whether the water you have access to — whether from a tap or otherwise — is drinkable? Mia Nacamulli examines water contamination and treatment.

Lesson by Mia Nacamulli, directed by Rooftop Animation.

[jeffmccutcheon]

Not everyone in the world has access to clean fresh water. So be thankful for what you have, and never waste water.

[BienvenidoAlHoloceno]

Never in my life have I worried about drinking tap water. It might seem like something quite obvious, but not everyone can say the same. It is amazing how so many things that we feel are a "given" are actually things to be grateful for.

[delvinfernaldy]

thank you, Ted this video have alot of research, script, animation, easy to understand this is pure of *QUALITY CONTENT*

[ethandat]

What did the ice cube say to the glass of water?


I was WATER before it was COOL.

[Andresmente]

It's amazing how when I get a question in my head of any subject, i can find a TED video about it.

[cup_check_official]

How do you know if the water is free from disease? Let your enemies drink it first

[jamescarmody]

This is a good simplifying of the water treatment process. It works well as an introduction to water purification, but if you want to pursue wastewater treatment there are a few more things you should know:

-Before any treatment, a grinder mashes physical material like toilet paper or diapers, rendering them smaller and subject to treatment.

-Sedimentation often occurs in two steps: *aeration, * when operators use an acid, base, and microorganisms to turn dissolved ions in water into gas and inject air to remove the gases. Sludge settles as sediment, and *clarification, * removes the sludge from the water. At my local sewage plant, aeration and clarification occur in two stages.

-Wastewater operators take water samples at various times during the day and conduct tests on them in a lab. Operators look to see how long sludge takes to settle--clarification should take longer than aeration. Conditions of the samples reflect what's happening in the tank.

-Some plants benefit from a *microfiltration* station, which catches microscopic material that sedimentation and filtration couldn't catch. Microfiltration has immense cleaning ability, but these machines are rare--my local plant has one, and it cost over a million dollars to build.

-Chlorine and ozone aren't the only ways to disinfect water. UV disinfection uses ultraviolet light to kill microorganism in treated water. All UV disinfection requires are some UV rods and a source of energy.

Source: I toured a sewage plant

[sarangpahwa]

Now I'm very much grateful that I've easy access to clean water😇

[d_wang]

Be careful of the Dihydrogen Monoxide in the water

[kirbymarchbarcena]

My grandparents never drank purified water.Way back then, they used a claypot with a small faucet to store water that came from their well.Strangely, I remember the taste is quite distinct and very cool despite the humidity.

[pandapower]

Before this video, there was an ad for a water purifier

[squid_cake]

Absolutely beautiful. I love how your conclusion includes inspiring sentences which help feel how others feel when they don't have clean water! I've been subscribed for a long time now, and it's surely nice to wake up to this every morning.

[icecold]

For the lazy people:
Make sure the water is clear and doesn't smell weird, so you don't die

[GTron]

3:11 Remember everyone, if you see letters in your water, don't drink it!

[Jibegagosiptta]

It reminds me of Matt damon in his interview, talking about his organization of offering clean water to countries with water shortages. So thoughtful:) And again, thanks so much Ted ed!

[Arrowo]

When youtube is more educational than school

[unfiltered]

I used to drink from a hose even though I had perfectly good water inside my house. I was 5

[yubby]

Watches video


Feels like I learned something


Friend asks what the video was about


Me: uh.... *watches video again

[mohdaamerkhan]

Hanz Zimmer - Stay can be heard playing in the background of the video. It's the main theme from the movie Interstellar.

[david_junior]

It's hard to not procrastinate when there are so many educational and entertaining videos😔