Challenge of Minimizingand Optimizing Water UsageTOYOTA’s Water Environment Policy
Promoting activities globally based on Toyota Water Environment Policy
Striving to consider the importance of water sustainability, Toyota will aim forrealizing prosperous societies that will share a sound water environment to the future.

Thoroughly reduce water usage
Minimize the impact on regional
water resources by minimizing
water withdrawal and utilizing
rainwater at each plant

Become ‘No.1 regional plant’leading to the prosperity ofentire societies

Clean thoroughly and return
Have a net positive impact on theenvironment by returning cleanwater in the local water
environment

Using local water resources carefully and becoming ‘No. 1 regional plant’01

Outline of 2030 Milestone
Minimizing impact on water environment● Implement measures, on a priority basis, in the regions where the impact on its water
environment is considered to be large

Water quantity

EuropeCompleted measures at the four Challenge-focused plants inNorth America, Asia and Southern Africa

Water quality
Completed impact assessments and measures at all of the 22
plants where used water is discharged directly to river in North
America, Asia and EuropeAsia

North America

Southern Africa

Maximizing communications● Disclose information appropriately and communicate actively with local communities and suppliers

Aiming for realizing minimization of impact on water environment
through approaches that match local water situation
02

Processes toward achieving the Challenge
Appropriate information disclosure

Continuous investigation of local
situation from a medium- to longterm perspective

Thorough implementation ofmeasures

Impact assessment based oncommunications with local
communities and suppliers

Application to other bases
Through continuous improvement of measures

Technological development+Thorough improvement

Selection of Challenge-focusedplants

Promoting the actions for the challenge continuously with taking potential
impact from a medium- to long-term perspective into consideration
03

Main Initiatives
Thoroughly reduce water usage
Utilizing water efficiently

Recycling waste water

Utilizing rainwater× OUT

Recycling facility

RECYCLE

REDUCE

Clean thoroughly and return
Reducing use of environmentallyhazardous substances

REDUCE

Thoroughly purifying
wastewater

PURIFY

Constantly checking water
quality

Preventing discharge
from the plants

×Chemical

Promoting technological development and actions
thoroughly under these 2 initiatives
04

Oil
Outsidethecompanies

Toyota's Water Use
Water usage ratio by process
in automobile manufacturing※Press：1%

Trend in water withdrawal of TMC
Water withdrawal (gigaliter)
25
Continuous reduction
20

Assembly：1%
Resin：5%

Welding：8%

15
Others：22%

Paint：63%

63%

10
5
2001

2005

2010

※ Takaoka Plant

Reducing water withdrawal by promoting reduction
in painting process which require high water usage
05

2015

<Case (1)> Water Saving Technologies in Painting Process
Painting process

Water supply controlof washing waterBefore

After the improvement

Reuse of washing waterby cascade system

Control of water amount usedin air-conditioners
Before③ Reuse water once used in theprevious process① Water supply

After the improvement

×
Steam〇 WatersprayGas
Water
Water keep spraying
even while vehicle isabsent

Sensor detects the presence ofvehicle and stops spraying while ② Collect water once used in vehicle washingvehicle is absent

BoilerAir-conditioner Water tank
Steam type :Humidification control: Difficult, Water use: Large
Water spray type :Humidification control: Easy, Water use: Less

Developing production technologies which enable efficient water usage06<Case (2)> Improvement of Efficiency in Wastewater Recycling
BeforeWastewater aftertreatment

MembraneAfter the improvement
Recycled water

Wastewater aftertreatment

Water

Membrane

Recycled water

Water

Ions and impurities
such as salt

Ions and impurities
such as salt

The membrane is clogged withimpurities.

Membrane clogging is prevented byoptimizing the treatment conditions anddispersing impurities.

* Membrane: Reverse osmosis membrane to pass water but block ions and impurities such as salt

Preventing degradation in efficiency due to clogged membrane07

<Case (3)> Efficient Use of Rainwater
Collection according to rainwater quality(1) Natural rainwater

Waterquality(2) Collected water

Only rainwater above 2mm
high from the level at thebeginning of each rainfall

Separation of natural water using
Karakuri
Rainwater

Karakuri, a special
mechanism(2) Collected water
Level equivalent to industrial water

Clean

0 0.5

2.05.0Total rainfall (mm)Efficiently utilizing clean rainwater
08(1) Natural rainwater<Achievement> Reduction Water Withdrawal in TMMF (in France)
Amount of industrial water withdrawal
120%20%（15-30%）50%（30-70%）
1/10

BeforeEfficient water
usage

Waste water in painting used inpreliminary washing

Recycling ofwastewater

Utilization ofrainwater

Waste water treatment plant

After the improvements

Rainwater reservoir

Reducing industrial water withdrawal by 90%09

Minimizing Impact on Water Environment
Withdrawal
Using rainwater effectively

RecycleRecycling waste water in plants

Use
Reducing amountof water used withusing it cleanly

Discharge
Steadily controlling
wastewater to be
kept clean

Maximizing water circulation in plants
but minimizing the impact on the local water environment
10