On the hill of San Diego where the sand is danced."Future drinking water" is around the very complicated and noisy devices with countless tanks, pipes, and cylinders.In this North City Water Plant, wastewater, which is not usually very drinkable, is reborn as a pure liquid that does not contain any impurities.It is too pure, so if you say it without additional processing, it will have a bad effect on your body.

The water purification system of this plant first destroys the bacteria and viruses in waste water with the power of ozone.Next, the water is sent to a filter packed with granular activated carbon, and an organic solid is removed.After that, the fine film is passed, and the remaining solids and microorganisms are removed.

"The pores in the membrane are very small and can only be seen with an ultra -high magnification," says Amy Doman, a deputy director of Pure Water San Diego in San Diego.Pure Water San Diego is a project that has been launched to improve the current situation that is carrying water from afar."This is a filtration device that only passes the molecules of water."

But this is not the end.In order to reliably remove impurities, in the next step, ultraviolet rays are irradiated with water, and microorganisms and other trace pollutants remain.

This creates the highest purity water, but it is so pure that minerals are added at the end and "adjust".Otherwise, the water will dissolve the copper of the water pipe.If you drink water before adjustment, it will absorb electrolytes in the body like a sponge.

A shortage of water that becomes serious

You may think it's too complicated as a way to create drinking water.But we have to do so because the West faces a very complicated climate crisis.

The whole San Diego and other southern California have greatly depended on the water of the North Colorado and the Colorado River.San Diego is located at the end of the supply line.

The Colorado River is not only in the Colorado, but also for 40 million people living in Colorado, Wyoming, Utah, Arizona, Nevada, and New Mexico.However, in recent years, it has been hit by an unprecedented dragon.It is clear that if global warming progresses, water shortages will become more serious.

Therefore, the city of San Diego needs to find a way to make the most of a few water.Pure Water San Diego's project is more than 40 % of the city's water by 2035 by recycling waste water from home and companies (that is, water used in sinks, shower, toilet, washing machine, etc.).It is an attempt to make it covered in the area.

"We are diversifying the water supply source," said Mayor San Diego, Todd Gloria."Citizens are in a situation where they have to rely on the water sent from far away, and the city has to solve this problem."

Efforts that expand in other states

The project has just started, and the water purification system of the North City Water Plant is now a experimental site.Engineers have tried various kinds of film films and are looking for the best way to waste water sent to the facilities.