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

  • Published on May 10, 2019

  • 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 http://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.
  • Why Are 96,000,000 Black Balls on This Reservoir? tags

  • polt
    polt 2 months ago

    Jesus christ, I finally watched it youtube are you happy?!

  • Sharky Playz
    Sharky Playz 3 days ago (edited)


  • SirDogeQ
    SirDogeQ 2 weeks ago

    "It's pretty rare to see 96 million of anything"

  • Anna Mae
    Anna Mae 2 days ago

    It’s pretty rare to 96 million anything

  • Gabi Pina
    Gabi Pina 2 days ago

    Water in L.A., keep throwing chemicals until you get cancer by drinking water.

  • Tiznado
    Tiznado 2 months ago

    Veritasium: It’s really rare to see 96 million of anything

  • Mila T
    Mila T 2 weeks ago

    Bromate.. Sounds like something a british rapper would call his friends.

  • Aditya More
    Aditya More 15 hours ago

    Imagine playing golf with a black ball near this reservoir and ball falls into it

  • Iwon
    Iwon 6 days ago

    20 years from now..

  • koji kabuto
    koji kabuto 18 hours ago

    Wow, this was a perfect solution to a problem. Balls. LOL

  • knight rider
    knight rider 2 months ago

    Its very rare to see 96 million of anything.

  • ziguy 7
    ziguy 7 2 weeks ago

    I swear I get this video in my recommended every time I go on YouTube.

  • Brian
    Brian 1 day ago

    Marty Adams - Chief Operating Officer, LADWP -- imagine if all government officials were as knowledgeable and explained problems and solutions as clearly. Very impressive. Thanks for making this video.

  • RaiseTheSpirit
    RaiseTheSpirit 2 weeks ago

    Gotta protect our drinking water.

  • Jonathan Perry
    Jonathan Perry 1 day ago

    This is what happens when Walmart buys a Chuck-E-Cheese franchise

  • Sako Chan
    Sako Chan 1 month ago


  • [SGL] Gaming
    [SGL] Gaming 2 days ago

    the question i had in mind was: Will blocking the sunlight cause microbes to multiply in the water ?!

  • jjohnston94
    jjohnston94 2 days ago

    Asked a question, then turns the camera away while he's answering.

  • Colinio
    Colinio 56 minutes ago

    It's a fantastic idea, so long as you don't drink the water!

  • todd morris
    todd morris 10 hours ago

    Then eat it buddy every night, all that food grade black plastic.