Challenge 4Challenge of Minimizing and Optimizing Water Usage

Fundamental Approach

According to forecasts, the world’s population will grow to 9.1 billion by 2050, water demand will increase 55 percent from current levels, and 40 percent of the world’s’ population is therefore expected to suffer water shortages*. Water is used in painting and other car manufacturing processes, making it imperative to reduce impacts on the water environment as much as possible. We have two main strategies to adopt our challenge; thoroughly reducing the amount of water used, and comprehensive water purification and returning it to the Earth.
Toyota has pursued various effective initiatives, such as collecting rainwater to reduce the amount of industrial water usage, raising the water recycling rate through filtering, recycling wastewater for reuse, and returning clean water to the local environment. As the local water environment differs depending on the region, moving forward, we intend to expand our water environment initiatives around the world, taking the local needs into account.

  • * According to Toyota data

Reduce Water Consumption in Production Activities

To reduce water usage in our production activities, we have been working to introduce innovative technologies alongside planned upgrades to our production lines, and to conduct regular activities to reduce water consumption. In FY2016, total water consumption at Toyota Motor Corporation (TMC) was 10.7 million m3 (down 1.9 percent year on year) and water consumption per unit produced was 4.3 m3 (down 8.0 percent year on year). Globally, Toyota is steadily implementing measures to gradually conserve water usage consumption depending on the water environment in each country and region. In particular, we are encouraging water recycling in those regions with scarce water resources. In FY2016, our water consumption totaled 31.3 million m3 (up 7.0 percent year on year) and water consumption per unit produced was 3.0 m3 (up 1.4 percent year on year).

Trends in Global Water Consumption and Consumption per Unit Produced

  • Scope: TMC and consolidated vehicle assembly subsidiaries and other companies, a total of 38 companies in Japan and overseas, including those added to scope of
    coverage from FY2013
  • Revised due to an error in past data

Major Initiatives during FY2016

  • At Toyota South Africa Motors (TSAM), water usage was reduced by alleviating clogging of equipment due to the use of hard water. Clogs were alleviated by using cooled water preprocessed to raise alkalinity.
  • At Toyota Motor Manufacturing, Mississippi (TMMMS), water usage was reduced in part by changing the type of spray nozzles used during the painting process and revising the spray timing
  • At Toyota Argentina (TASA), water usage was reduced via transparency of water usage during the painting process and through optimal control of peripheral equipment