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Initiatives in Manufacturing

Initiatives in Manufacturing

Preventing Water and Air Pollution

To preserve water and air quality, Mazda has specified voluntary emission standards stricter than the legal requirements and is ensuring appropriately low emissions of pollutants.


Clean Water Consumption at Mazda's Four Principal Domestic Sites*1 Reduced by 33.4% Compared with FY March 2011 Levels

Clean Water Consumption at 4 Principal Domestic Sites

With the exception of its Miyoshi Plant, nearly all the water*2 Mazda uses in production processes at the plants and offices in Japan is water for industrial use. The Company does not use subsurface water, as this may cause ground subsidence. Mazda also makes effective use of water by collecting and storing rainwater for use in the Miyoshi Plant.
Furthermore, Mazda is committed to saving clean water consumption at plants and offices.

  • *1Head Office (Hiroshima); Miyoshi Plant; Hofu Plant, Nishinoura District; Hofu Plant, Nakanoseki District (including R&D and other indirect areas).
  • *2One of the features of Mazda's water use is that the Company proactively implement Japan's Industrial Water Law at its headquarters plant in Hiroshima Prefecture and at its Hofu Plant in Yamaguchi Prefecture. The industrial water law is national in scope.Below is the reference brief explanation about the industrial water program.
    Local government authorities continuously take in a fixed quantity of water from rivers. Companies which participate in the industrial water use program contract with local government authorities to receive a certain amount of water regularly.
    Mazda Motor Corporation discharges both purified water after it has been used and unused clean water through exclusive piping and returns it to rivers and the ocean.
    This process helps prevent flooding and promote biodiversity.

When discharging wastewater to public waterworks, Mazda maintains voluntary standards stricter than the legal requirements, and manages discharge daily. The Company also ensures wastewater cleanliness by properly treating water used for industrial processes, human hygiene, and other purposes.

Overview of Wastewater Treatment System (Hiroshima Plant)

<Overseas Activities>

  • Changan Ford Mazda Engine Co., Ltd., located in Nanjing, China, in 2014 started to change the cooling water in production processes and sprinkling water for green spaces from clean water to recycled wastewater, aiming to reduce the clean water consumption by 100,000 m³ per year.
  • Mazda de Mexico Vehicle Operation (MMVO) enjoys a high reputation as the first automobile plant to be granted a local environmental license before the beginning of operations. To ensure effective use of water resources, MMVO treats the well water used in the production process at the wastewater treatment facility within the plant, and uses the recycled water for watering green spaces in the plant. The process has been highly praised by the authorities for helping water return to nature. In FY March 2014, the volume of well water consumption was reduced by recycling around 40,000 m³ of wastewater for water sprinkling. In FY March 2015, continuous efforts will be made to promote effective use of water resources through the recycling of wastewater.
    In FY March 2013, MMVO formulated rainwater keeping pits in 30,000 locations in a mountainous region of 100 ha in the natural environmental conservation region as a river-head area, in order to keep water resource by assisting rainwater circulation near the plant.

Air Pollution Prevention: Actively Adopting Fuels that Reduce Environmental Burdens

Mazda is continuing efforts to reduce the emission of sulfur oxides (SOx), nitrogen oxides (NOx), dust and soot, fine particles, vapors, and volatile organic compounds (VOCs).
In addition, Mazda is shifting the use of fuel oil to that of city gas and makes other efforts to actively adopt materials that reduce the environmental burden.

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