Why Are 96,000,000 Black Balls on This Reservoir?

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I took a boat through 96 million black plastic balls on the Los Angeles reservoir to find out why they're there. The first time I heard about shade balls the claim was they reduce evaporation. But it turns out this isn't the reason they were introduced.
Huge thanks to LADWP for arranging this special tour for me. Next time let's put the GoPro on the submersible!
The balls are made of high density polyethylene (HDPE) which is less dense than water so they float on the surface of the reservoir even if they break apart. They are 10cm (4 inches) in diameter and contain about 210ml of water. So the main reason they are on the reservoir is to block sunlight from entering the water and triggering a chemical reaction that turns harmless bromide into carcinogenic bromate. This effect occurs with prolonged exposure to bromate so regulators insist that levels be kept below 10 microgram per liter on average over a 12 month period.
Special thanks to Patreon supporters:
Donal Botkin, Michael Krugman, Ron Neal, Stan Presolski, Terrance Shepherd, Penward Rhyme and everyone who provided feedback on an early draft of this video.
Thanks to:
Las Virgenes Reservoir for footage of initial shade ball dump
Euro-Matic for bird into jet-engine footage
Researched and Produced by Casey Rentz
Animations by Maria Raykova
Music from epidemicsound.com "Colorful Animation 4" "Seaweed"
And from Kevin MacLeod "Marty Gots a Plan"
This is an educational video about the science of water quality.

PANKAJ KUMAR MEENA 9 minuter sedan
Humans steal independency of birds for his own selfishness now i am felling sad that i cannot do anything 😔😔😔😔
village talent rangoli
village talent rangoli 46 minuter sedan
João Vitor Nunes
João Vitor Nunes Timme sedan
In brazil we use aquatic plants
geo 777
geo 777 2 timmar sedan
Who else got this in their recommended on 3rd dec 2020 and just clicked on the video because they forgot why theres 96 mil balls on that reservoir
Navwin Kumar
Navwin Kumar 3 timmar sedan
In india tamilnadu ancient idea to grow lotus planet to avoid water evaporation.
ГТА ФОРЕВА 5 timmar sedan
The deeply account undeniably practise because apparel encouragingly unpack midst a nosy ramie. astonishing, literate swan
Dale Kim
Dale Kim 6 timmar sedan
"Very rare to see 96 million of anything" Atom: helo
Vickie Sanders
Vickie Sanders 10 timmar sedan
Did this man just show a bird getting murdered by a plane at 5:50
Gamer Do Futuro
Gamer Do Futuro 12 timmar sedan
Que porra é essa youtube?
DANG JOS 13 timmar sedan
9:44 Inferior mirage!
Tee Jay
Tee Jay 14 timmar sedan
"Very rare to see 96 million of anything" Atom: helo
Makanouchi Ippo
Makanouchi Ippo 22 timmar sedan
It all started when Mr.Beast had an idea
wersy2 22 timmar sedan
Isn't there a danger that the abrasion can create mico plastic, which will end up in the drinking water?
sardar Asad khan
sardar Asad khan 23 timmar sedan
The most stupid idea in the world what kind if stupid brainless people are running this world
Satellite Dag sedan
the balls of these people...
Cultured Man
Cultured Man Dag sedan
"It is very rare to see 96.000.000 of something" Water molecules: We are here, just to suffer.
qazweriopkoilj 41 minut sedan
You can't see water molecules. Only water. Duh.
Mr. TM
Mr. TM Dag sedan
I still like this
Paul Haynes
Paul Haynes Dag sedan
Why do they stack up on top of each other - surely the natural settled situation would be a uniform single layer of balls?
Paul Haynes
Paul Haynes Dag sedan
Bit worried about a boat with what looks/sounds like a petrol driven outboard sailing across all that DRINKING water! Surely an ideal place to use an electric boat?
Harriet Ramos
Harriet Ramos Dag sedan
"Very rare to see 96 million of anything" Atom: helo
Orange Crate
Orange Crate Dag sedan
The ultimate, 'No dessert until your room is cleaned up', nightmare.
Michael Antonio
Michael Antonio Dag sedan
Waste more water making the balls than the balls saved.
Patriot Republic
Patriot Republic Dag sedan
There is just no limit to the ways those enviromemtal wackos can waste other people money
Jm Elizares
Jm Elizares Dag sedan
bruh even riley reid cant take that many black balls
Rodrigo Dias
Rodrigo Dias Dag sedan
Sameer Khan
Sameer Khan Dag sedan
Who counted thm.
Julijan D.
Julijan D. Dag sedan
bro mate
Luis Eugenio Calle Vasquez
Luis Eugenio Calle Vasquez Dag sedan
This gives me Shadesmar vibes
Ganesh Ram
Ganesh Ram Dag sedan
Remembering Thermocoal experiment in tamilnadu 😋😉
Lenny Dag sedan
Bromide + Ozone = Bromate Bromate + Sam + Dean = Bromance
chris Dag sedan
but can you get rid of them in case later? or wouldn't they fly or flow to somewhere else and get messy
Pink Mist
Pink Mist Dag sedan
sleepycacilocat :3
sleepycacilocat :3 Dag sedan
7:14 after ten years: 👁👄👁
Poking My Nose
Poking My Nose 2 dagar sedan
Imagine losing a black ball in the water
Siddharth 18 timmar sedan
harini M
harini M 2 dagar sedan
U people use these balls...but in tamilnadu our minister very clever minister 🤣used thermocol upon water so that the water won't evaporate....🤣🤣🤣🤣🤣🤣🤣🤣
Tony Celestino
Tony Celestino 2 dagar sedan
I thought Oscar Pistorius was still banged up
BIlly madisons Bestest friend
BIlly madisons Bestest friend 2 dagar sedan
Hi yes id like to report a malfunction of my bird balls.. Birdball Rep: "Did you try working the shaft?"
Baby Jay
Baby Jay 2 dagar sedan
You could drown so easily
Anti Green
Anti Green 2 dagar sedan
Skoteinos 2 dagar sedan
Adam Werner Villa
Adam Werner Villa 2 dagar sedan
5:50 that bird just died
brent y joseph
brent y joseph 2 dagar sedan
Human: *Put shade balls to cover the sun" Fish prophet: "The dark age is already begin my friends"
Daksh Badal
Daksh Badal Dag sedan
7E_27_Saint 3 dagar sedan
Wish it was 69 million
Wayank 3 dagar sedan
Indonesian java bali tourist information please visit #wayank or #masterway channel
Gregory Parslow
Gregory Parslow 3 dagar sedan
The boat driver seemed like a dickhead
Francium Wave
Francium Wave 3 dagar sedan
I count them, it was 95,999,999.
mori linda
mori linda 3 dagar sedan
Black Friday deals loading.....
JustMoseyinAround 3 dagar sedan
Sphere for the win once again
Cadhala TheGamer
Cadhala TheGamer 3 dagar sedan
It probably just me but the shade balls look like programmable matter forming while they drive through them.
Natsu Etherious
Natsu Etherious 3 dagar sedan
rsa mama
rsa mama 3 dagar sedan
3:02 The main reason explained.
Dr Ford
Dr Ford 3 dagar sedan
First thing I saw, Gino!!!!!
Manget 3 dagar sedan
My 2 years old daughter pointing at 2 guys with gun in the streets like 0:57
ragu v
ragu v 3 dagar sedan
Thermakol Raju fans like here
Ruben Hayk
Ruben Hayk 3 dagar sedan
that water doesn't look safe to drink anyway
Drishti Sanger
Drishti Sanger 3 dagar sedan
The keyword is “rare”, which means not very common. All the posts in response to the statement seem to miss the point. But they are abundant in creativity.
oogly boogly
oogly boogly 3 dagar sedan
It's also interesting that the balls are arranged In a hexagonal pattern, the most compact way to store spheres.
Adam Rafique Akmal Mansor
Adam Rafique Akmal Mansor 3 dagar sedan
RIP birb 5:52 ???-2019
Barbie Blue
Barbie Blue 3 dagar sedan
Plastic breaking down in water would not drink or fish 🐠