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FYE March 2022 Environmental Performance Data for Plants and Offices

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In addition to complying with the laws and regulations, SUBARU sets voluntary standards that are 20% stricter than the legal regulation values to manage the controlled substances.
The following shows the regulation values and measured performance data for our plants and offices regarding the main substances.

Atmosphere (Air Pollution Control Act, Prefectural Regulations)

Automotive Business

Gunma Plant

Main Plant
Substance Equipment / Facility Unit Regulation Voluntary Standard Maximum Average
NOx Paint drying oven ppm 230 184 44 34
Particulate matter g/Nm3 0.2 0.16 0.005 0.003
VOC Paint booth, etc. ppm-C 700 - 588 176
Yajima Plant
Substance Equipment / Facility Unit Regulation Voluntary Standard Maximum Average
NOx Paint drying oven ppm 230 184 77 53
Particulate matter g/Nm3 0.2 0.16 < 0.005 0.003
VOC Paint booth, etc. ppm-C 700 - 362 59
VOC ppm-C 400 - 315 89
Oizumi Plant
Substance Equipment / Facility Unit Regulation Voluntary Standard Maximum Average
NOx Aluminum melting furnace ppm 180 144 100 44
Particulate matter g/Nm3 0.3 0.24 0.029 0.008
Ota North Plant

No applicable equipment / facility

Tokyo Office

No applicable equipment / facility

Aerospace Company

Utsunomiya Plant

Main Plant
Substance Equipment / Facility Unit Regulation Voluntary Standard Maximum Average
NOx Cogeneration ppm 600 480 139 121.5
NOx Drying oven ppm 230 184 < 100 < 100
Particulate matter g/Nm3 0.2 0.16 < 0.010 < 0.010
South Plant and 2nd South Plant

No applicable equipment / facility

Handa Plant

Substance Equipment / Facility Unit Regulation Voluntary Standard Maximum Average
SOx 2-ton boiler ppm 1.5 1.2 < 0.02 < 0.02
NOx ppm 180 144 35 27.1
Particulate matter g/Nm3 0.1 0.08 < 0.002 < 0.002

Handa West Plant

Substance Equipment / Facility Unit Regulation Voluntary Standard Maximum Average
SOx 2-ton boiler ppm 1.5 1.2 < 0.02 < 0.02
NOx ppm 180 144 30 23.7
Particulate matter g/Nm3 0.1 0.08 0.003 0.002

Water Quality (Water Pollution Prevention Act, Sewerage Act, Prefectural/Municipal Regulations)

Automotive Business

Gunma Plant

Main Plant (Effluent is discharged into public rivers.)
Item Unit Regulation
(Prefectural Regulation)		 Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5.8～8.6  6.1～8.3 7.8 6.6 7.2
Biochemical oxygen demand (BOD) mg/L 25 20 7.8 1.0 3.1
Suspended solids (SS) mg/L 50 40 3.6 1.0 1.3
n-Hexane extract content
(Mineral oil content)		 mg/L 5 4 1.0 1.0 1.0
n-Hexane extract content
(Animal and plant oil and fat content)		 mg/L 30 24 1.0 1.0 1.0
Fluorine and its compounds mg/L 8 6.4 2.3 0.2 0.8
Zinc content mg/L 2 1.6 0.300 0.000 0.156
Soluble iron content mg/L 10 8 0.2 0.1 0.1
Soluble manganese content mg/L 10 8 3.5 0.1 0.4
Phosphorus content mg/L 16 (8) 6.4 3.1 0.1 1.1
Nitrogen content mg/L 120 (60) 48 14.2 1.8 8.1

Measured at two drainage outlets (New No. 2 and No. 5 waterways). Values for total phosphorus content and total nitrogen content are daily averages.

Yajima Plant (Effluent is discharged into public rivers.)
Item Unit Regulation
(Prefectural Regulation)		 Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5.8～8.6  6.1～8.3 7.5 6.9 7.3
Biochemical oxygen demand (BOD) mg/L 25 20 15.8 1.0 5.1
Suspended solids (SS) mg/L 50 40 4.0 1.0 1.7
n-Hexane extract content
(Mineral oil content)		 mg/L 5 4 1.0 1.0 1.0
n-Hexane extract content
(Animal and plant oil and fat content)		 mg/L 30 24 1.0 1.0 1.0
Fluorine and its compounds mg/L 8 6.4 2.3 0.8 1.6
Zinc content mg/L 2 1.6 0.646 0.220 0.484
Soluble iron content mg/L 10 8 0.1 0.1 0.1
Soluble manganese content mg/L 10 8 0.1 0.1 0.1
Phosphorus content mg/L 16 (8) 6.4 0.9 0.3 0.6
Nitrogen content mg/L 120 (60) 48 7.3 2.8 5.5

Values for total phosphorus content and total nitrogen content are daily averages.

Oizumi Plant (Effluent is discharged into public rivers.)
Item Unit Regulation
(Prefectural Regulation)		 Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5.8～8.6  6.1～8.3 7.5 6.8 7.2
Biochemical oxygen demand (BOD) mg/L 10 8 7.7 1.0 3.2
Suspended solids (SS) mg/L 10 8 6.0 1.0 1.4
n-Hexane extract content
(Mineral oil content)		 mg/L 3 2.4 1.0 1.0 1.0
n-Hexane extract content
(Animal and plant oil and fat content)		 mg/L 30 24 1.0 1.0 1.0
Fluorine and its compounds mg/L 8 6.4 0.2 0.2 0.2
Zinc content mg/L 2 1.6 0.288 0.067 0.169
Soluble iron content mg/L 5 4 0.1 0.1 0.1
Soluble manganese content mg/L 5 4 0.1 0.1 0.1
Phosphorus content mg/L 16 (8) 6.4 0.2 0.1 0.1
Nitrogen content mg/L 120 (60) 48 14.9 4.2 9.6

Values for total phosphorus content and total nitrogen content are daily averages.

*
Regulation values were changed on April 1, 2021 due to the signing of an environmental challenge agreement with Oizumi Town in accordance with Gunma Prefecture ordinances.
Ota North Plant (Effluent is discharged into public rivers.)
Item Unit Regulation
(Prefectural Regulation)		 Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5.8～8.6  6.1～8.3 8.0 7.9 8.0
Biochemical oxygen demand (BOD) mg/L 25 20 2.3 1.0 1.7
Suspended solids (SS) mg/L 50 40 5.6 1.0 3.3
n-Hexane extract content
(Mineral oil content)		 mg/L 5 4 1.0 1.0 1.0
n-Hexane extract content
(Animal and plant oil and fat content)		 mg/L 30 24 1.0 1.0 1.0
Fluorine and its compounds mg/L 8 6.4 0.2 0.2 0.2
Zinc content mg/L 2 1.6 0.026 0.018 0.022
Soluble iron content mg/L 10 8 0.1 0.1 0.1
Soluble manganese content mg/L 10 8 0.2 0.1 0.2
Phosphorus content mg/L 16 (8) 6.4 0.1 0.1 0.1
Nitrogen content mg/L 120 (60) 48 1.1 0.8 1.0

Values for total phosphorus content and total nitrogen content are daily averages.

Tokyo Office (Discharged into sewage.)

Item Unit Regulation* Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5～9 5.4～8.6 8.9 7.4 8.4
Biochemical oxygen demand (BOD) mg/L 600 480 370 42 144
Suspended solids (SS) mg/L 600 480 560 35 136
n-Hexane extract content
(Mineral oil content)		 mg/L 5 4 0 0 0
n-Hexane extract content
(Animal and plant oil and fat content)		 mg/L 30 24 22.0 1.0 9.0
Total phosphorus mg/L 16 12.8 9.4 0.4 4.8
Total nitrogen mg/L 120 96 110 9 60
Soluble manganese mg/L 10 8 0.03 0.01 0.02
Cyanogen mg/L 1 0.8 0 0 0
*
An on-site inspection by Mitaka City revealed that BOD and total nitrogen exceeded the discharge standards of the city’s sewage ordinance. Investigations were conducted to determine the cause of the problem, including surveys of high-concentration hours, and remedial measures were implemented.

Aerospace Company

Utsunomiya Plant

Main Plant (Discharged into sewage.)
Item Unit Regulation Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5～9 5.4～8.6 8.6 6.7 7.6
Suspended solids (SS) mg/L 600 480 390 < 1.0 79
Biochemical oxygen demand (BOD) mg/L 600 480 344 0.5 85
n-Hexane extract content
(Mineral oil content)		 mg/L 5 4 < 1.0 < 1.0 < 1.0
n-Hexane extract content
(Animal and plant oil and fat content)		 mg/L 30 24 22.4 < 1.0 7.7
Fluorine compounds mg/L 8 6.4 1.4 < 0.2 0.3
Cyanogen mg/L 1 0.8 < 0.1 < 0.1 < 0.1
Cadmium mg/L 0.03 0.024 < 0.003 < 0.003 < 0.003
Total chromium mg/L 2 1.6 0.09 < 0.01 0.02
Hexavalent chromium mg/L 0.1 0.08 < 0.02 < 0.02 < 0.02
Main Plant (Effluent is discharged into public rivers.)
Item Unit Regulation Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5.8～8.6 6.0～8.3 8.3 6.8 7.7
Suspended solids (SS) mg/L 50 40 6.4 < 1.0 2.5
Biochemical oxygen demand (BOD) mg/L 30 24 8.1 0.6 1.3
n-Hexane extract content
(Mineral oil content)		 mg/L 5 4 < 1.0 < 1.0 < 1.0
n-Hexane extract content
(Animal and plant oil and fat content)		 mg/L 30 24 < 1.0 < 1.0 < 1.0
Cyanogen mg/L 1 0.8 < 0.1 < 0.1 < 0.1
Cadmium mg/L 0.03 0.024 < 0.003 < 0.003 < 0.003
Total chromium mg/L 2 1.6 < 0.01 < 0.01 < 0.01
Hexavalent chromium mg/L 0.5 0.4 < 0.02 < 0.02 < 0.02
South Plant (Discharged into sewage.)
Item Unit Regulation Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5～9 5.4～8.6 8.3 6.8 7.4
Suspended solids (SS) mg/L 600 480 478 1.8 62.3
Biochemical oxygen demand (BOD) mg/L 600 480 95.7 3.2 93.1
n-Hexane extract content
(Mineral oil content)		 mg/L 5 4 < 0.1 < 0.1 < 0.1
n-Hexane extract content
(Animal and plant oil and fat content)		 mg/L 30 24 9 < 0.1 2.4
Cyanogen mg/L 1 0.8 < 0.1 < 0.1 < 0.1
Cadmium mg/L 0.03 0.024 < 0.003 < 0.003 < 0.003
Total chromium mg/L 2 1.6 < 0.01 < 0.01 < 0.01
Hexavalent chromium mg/L 0.1 0.08 < 0.02 < 0.02 < 0.02
South Plant (Effluent is discharged into public rivers.)
Item Unit Regulation Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5.8～8.6 6.0～8.3 7.9 6.9 7.2
Suspended solids (SS) mg/L 50 40 5.6 1.2 2.5
Biochemical oxygen demand (BOD) mg/L 30 24 12 0.6 1.6
n-Hexane extract content
(Mineral oil content)		 mg/L 5 4 < 0.1 < 0.1 < 0.1
Cyanogen mg/L 1 0.8 < 0.1 < 0.1 < 0.1
Cadmium mg/L 0.03 0.024 < 0.003 < 0.003 < 0.003
Total chromium mg/L 2 1.6 < 0.01 < 0.01 < 0.01
Hexavalent chromium mg/L 0.5 0.4 < 0.02 < 0.02 < 0.02
2nd South Plant (Discharged into sewage.)
Item Unit Regulation Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5～9 5.4～8.6 8.3 7.1 7.0
Suspended solids (SS) mg/L 600 480 85 1.2 26.8
Biochemical oxygen demand (BOD) mg/L 600 480 145 1.1 30.5
n-Hexane extract content
(Mineral oil content)		 mg/L 5 4 < 0.1 < 0.1 < 0.1
n-Hexane extract content
(Animal and plant oil and fat content)		 mg/L 30 24 4.7 < 1.0 2.0
Fluorine compounds mg/L 8 6.4 0.7 < 0.2 0.2
Cyanogen mg/L 1 0.8 < 0.1 < 0.1 < 0.1
Cadmium mg/L 0.03 0.024 < 0.003 < 0.003 < 0.003
Total chromium mg/L 2 1.6 1.1 < 0.01 0.08
Hexavalent chromium mg/L 0.1 0.08 < 0.02 < 0.02 < 0.02
2nd South Plant (Effluent is discharged into public rivers.)
Item Unit Regulation Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 5.8～8.6 6.0～8.3 7.4 6.5 6.9
Suspended solids (SS) mg/L 50 40 2.8 1.6 2.2
Biochemical oxygen demand (BOD) mg/L 30 24 3.9 0.7 1.5
n-Hexane extract content(Mineral oil content) mg/L 5 4 < 0.1 < 0.1 < 0.1
Cyanogen mg/L 1 0.8 < 0.1 < 0.1 < 0.1
Cadmium mg/L 0.03 0.024 < 0.003 < 0.003 < 0.003
Total chromium mg/L 2 1.6 < 0.01 < 0.01 < 0.01
Hexavalent chromium mg/L 0.5 0.4 < 0.02 < 0.02 < 0.02

Handa Plant (Effluent is discharged into public rivers.)

Item Unit Regulation Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 6～8 6～8 8.0 6.0 6.9
Suspended solids (SS) mg/L 25 20 10 1.0 1.6
Biochemical oxygen demand (BOD) mg/L 25 20 18 0.5 2.7
Chemical oxygen demand (COD) mg/L 25 20 15 0.9 4.3
n-Hexane extract content
(Mineral oil content)		 mg/L 2 1.6 < 0.5 < 0.5 < 0.5
Cyanogen mg/L 10 8 < 0.1 < 0.1 < 0.1
Cadmium mg/L 0.03 0.024 < 0.005 < 0.005 < 0.005
Total chromium mg/L 2 1.6 < 0.04 < 0.04 < 0.04
Hexavalent chromium mg/L 0.5 0.4 < 0.04 < 0.04 < 0.04

Handa West Plant (Effluent is discharged into public rivers.)

Item Unit Regulation Voluntary Standard Maximum Minimum Average
Hydrogen ion concentration (pH) - 6～8 6～8 7.8 7.0 7.4
Suspended solids (SS) mg/L 15 12 9.0 1.0 2.8
Biochemical oxygen demand (BOD) mg/L 15 12 6.4 1.6 3.1
Chemical oxygen demand (COD) mg/L 15 12 7.1 0.5 5.1
n-Hexane extract content
(Mineral oil content)		 mg/L 2 1.6 < 0.5 < 0.5 < 0.5
Cyanogen mg/L 2 1.6 < 0.1 < 0.1 < 0.1
Cadmium mg/L 0.5 0.4 < 0.005 < 0.005 < 0.005
Total chromium mg/L 0.2 0.16 < 0.04 < 0.04 < 0.04
Hexavalent chromium mg/L 0.3 0.3 < 0.04 < 0.04 < 0.04

Noise (Noise Regulation Act, Prefectural Regulations, Agreements)

Automotive Business

Gunma Plant

Measurement Location Unit Regulation*
(Night)		 Voluntary Standard Number of Measurement Sites Maximum
Main Plant dB(A) 55 54 8 54
Yajima Plant dB(A) 55 54 10 50
Oizumi Plant dB(A) 50 49 10 49
*
The Oizumi Plant exceeded regulatory levels due to intermittent noise. We have confirmed that this intermittent noise is no longer occurring.

Aerospace Company

Utsunomiya Plant

Measurement Location Unit Regulation
(Night)		 Voluntary Standard Number of Measurement Sites Maximum
Main Plant dB(A) 60 58 8 49
South Plant dB(A) 50 48 3 38
2nd South Plant dB(A) 50 48 3 42

Handa Plant

Measurement Location Unit Regulation
(Night)		 Voluntary Standard Number of Measurement Sites Maximum
Handa Plant dB(A) 65 63 3 50

Handa West Plant

Measurement Location Unit Regulation
(Night)		 Voluntary Standard Number of Measurement Sites Maximum
Handa West Plant dB(A) 65 63 6 46

Kisarazu Office

Measurement Location Unit Regulation
(Night)		 Voluntary Standard Number of Measurement Sites Maximum
Kisarazu Office dB(Z) 50 48 2 34

Vibration (Vibration Regulation Act, Prefectural Regulations, Agreements)

Automotive Business

Gunma Plant

Measurement Location Unit Regulation
(Night)		 Voluntary Standard Number of Measurement Sites Maximum
Main Plant dB(A) 65 64 8 42
Yajima Plant dB(A) 65 64 10 43
Oizumi Plant dB(A) 60 59 10 37

Aerospace Company

Utsunomiya Plant

Measurement Location Unit Regulation
(Night)		 Voluntary Standard Number of Measurement Sites Maximum
Main Plant dB(Z) 65 63 8 32
South Plant dB(Z) 60 58 2 <30
2nd South Plant dB(Z) 60 58 3 <30

Handa Plant and Handa West Plant

Measurement Location Unit Regulation
(Night)		 Voluntary Standard Number of Measurement Sites Maximum
Handa Plant dB(Z) 70 68 3 <32
Handa West Plant dB(Z) 70 68 5 <30

Kisarazu Office

Measurement Location Unit Regulation
(Night)		 Voluntary Standard Number of Measurement Sites Maximum
Kisarazu Office dB(Z) 55 53 2 <30

Odor (Offensive Odor Control Act)

Automotive Business

Gunma Plant

Measurement Location Regulation Voluntary Standard Number of Measurement Sites Maximum
Main Plant 21 20 6 <10
Yajima Plant 21 20 8 <10
Oizumi Plant 21 20 6 <10

[Odor index]

Chemical Substances Subject to Japan’s Pollutant Release and Transfer Register (PRTR) System: Amount Handled and Emissions

Automotive Business

Gunma Plant (Main Plant, Yajima Plant, Oizumi Plant, Subaru Test & Development Center (SKC))

Chemical Substance Amount Handled Emissions Amount Transferred Amount Consumed Amount Removed through Processing Amount Recycled
Atmosphere Water Sewer Waste
Water-soluble zinc compounds 10,268 0 147 0 0 10,121 0 0
Ethylbenzene 336,575 182,098 0 0 0 30,432 45,731 78,314
Xylene 413,747 170,729 0 0 0 127,537 63,085 52,396
1,2,4-Trimethylbenzene 206,182 1,020 0 0 0 205,163 0 0
1,3,5-Trimethylbenzene 22,387 12,746 0 0 0 1,357 4,918 3,366
Toluene 526,112 171,900 0 0 0 259,486 44,730 49,995
Naphthalene 7,466 5,080 0 0 0 0 1,355 1,031
Nickel compounds 612 0 17 0 290 306 0 0
Bis(2-ethylhexyl) phthalate 4,965 0 0 0 96 4,868 0 0
Hydrogen fluoride and its water-soluble salts 5,160 0 4,696 0 0 464 0 0
n-Hexane 89,727 301 0 0 0 89,426 0 0
Benzene 15,897 53 0 0 0 15,843 0 0
Formaldehyde 9,337 4,380 0 0 1,209 0 2,035 1,712
Manganese and its compounds 4,040 0 106 0 1,864 2,071 0 0
Dioxins
Unit: mg-TEQ/year		 0 0 0 0 0 0 0 0
Cumene 1,696 1,046 0 0 0 0 402 248
Methylnaphthalene 8,813 46 0 0 0 8,767 0 0
Total 1,662,985 549,401 4,965 0 3,459 755,843 162,255 187,062
554,366

[Unit: kg/year, excluding dioxins (mg-TEQ/year)]

Tokyo Office

Chemical Substance Amount Handled Emissions Amount Transferred Amount Consumed Amount Removed through Processing Amount Recycled
Atmosphere Water Sewer Waste
Ethylbenzene 11,401 0.12 0 0 536 0 0 0
Ethylene glycol 2,002 0 0 0 0 0 0
Xylene 49,650 0.47 0 0 2,321 0 0 0
1.3.5-Trimethylbenzene 7,702 0.02 0 0 536 0 0 0
Toluene 185,605 5.76 0 0 10,714 0 0 0
1.2.4-Trimethylbenzene 37,626 0.13 0 0 1,920 0 0 0
Benzene 6,329 0.72 0 0 268 0 0 0
n-Hexane 20,563 5.38 0 0 446 0 0 0
Total 320,878 12.60 0 0 16,740 0 0 0
12.60

[Unit: kg/year]

Aerospace Company

Chemical Substance Amount Handled Emissions Amount Transferred Amount Consumed Amount Removed through Processing Amount Recycled
Atmosphere Water Sewer Waste
Toluene 22,527 5,412 0 0 1,521 15,594 0
Xylene 2,031 218 0 0 71 1,742 0
Total 24,558 5,630 0 0 1,592 17,336 0 0

[Unit: kg/year]

Sustainability&CSR > Environment

Environmental Management
Environmentally Friendly Automobiles
Climate Change
Resource Recycling
Water Resources
Biodiversity
Prevention of Pollution
FYE March 2022 Environmental Performance Data for Plants and Offices