Anderson won, and took home around $2,000 The winning symbol was given to the public domain, and that was it. He wasn't even a graphic designer — he was studying engineering at USC.
"It didn’t take me long to come up with my design: a day or two. I almost hate to admit that now," writes Anderson.
"But I’d already done a presentation on recycling waste water and I’d come up with a graphic that described the flow of water: from reservoirs through to consumption, so I already had arrows and arcs and angles in my mind."
The symbols - and variations of it - are now everywhere.