Sustainability

CSR Report Supplemental Materials:
Water Contaminant Measurement Results (Japan)

Results of water contaminant measurements (by Site, FY2015) 
Site Item Regulation requirement NSK control value Actual value Discharge point
NSK Ltd. Ohtsu Plant pH 6.0~8.5 6.0~8.4 6.1~7.9 Morikoshi River
BOD (mg/l) 70 20 35
COD (mg/l) 70 20 19
Suspended solids (mg/l) 90 25 17
Oil (mg/l) 5 4 0.5
Nitrogen (mg/l) 40 20 7.7
Phosphorus (mg/l) 2 1.8 1.1
Ishibe Plant pH 6.0~8.5 6.3~8.3 6.8~7.6 Yasu River
BOD (mg/l) 40 20 9.7
COD (mg/l) 40 20 10
Suspended solids (mg/l) 90 25 6
Oil (mg/l) 5 4 0
Nitrogen (mg/l) 15 14 3
Phosphorus (mg/l) 1.5 1.4 0
Saitama Plant / Saitama Precision Machinery and Parts Plant pH 5.8~8.6 6.0~8.4 7.1~7.7 Naka River
BOD (mg/l) 25 20 2.9
COD (mg/l) 160 20 5.6
Suspended solids(mg/l) 60 25 0
Oil (mg/l) 5 4 0
Nitrogen (mg/l) 120 60 2.2
Phosphorus (mg/l) 16 8 0.54
Kirihara Branch pH 5.8~8.6 6.0~8.4 7.5~8.3 Hikichi River
BOD (mg/l) 60 20 2.6
COD (mg/l) 60 20 3.7
Suspended solids(mg/l) 90 25 6.5
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 120 60 3.2
Phosphorus (mg/l) 16 8 0.96
Fukushima Plant pH 5.8~8.6 6.0~8.4 6.1~7.7 Yashiro River
BOD (mg/l) 20 18 5.1
Suspended solids (mg/l) 50 25 6.8
Oil (mg/l) 5 4 0
Haruna Plant pH 5.8~8.6 6.0~8.5 7.0~8.1 Mukai River
BOD (mg/l) 25 20 8
Suspended solids (mg/l) 50 25 5
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 120 60 12
Phosphorus (mg/l) 16 8 2.1
Maebashi Precision Machinery Plant / Steering Technology Center pH 5.8~8.6 6.0~8.4 7.2~8.0 Someya River
BOD (mg/l) 25 20 3
COD (mg/l) 25 20 5
Suspended solids (mg/l) 50 25 4
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 120 60 2.1
Phosphorus (mg/l) 16 8 0.2
NSK Steering Systems Co., Ltd. Soja Plant (Soja) pH 5.8~8.6 6.0~8.4 7.0~7.8 Taki River
BOD (mg/l) 60 20 7
COD (mg/l) 60 20 8
Suspended solids(mg/l) 70 25 14
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 120 60 7.3
Phosphorus (mg/l) 16 8 0.5
Soja Plant (Akagi) pH 5.8~8.6 6.0~8.4 7.0~7.6 Kamisawa River
BOD (mg/l) 25 20 4
COD (mg/l) 25 20 9
Suspended solids (mg/l) 50 25 11
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 120 60 16
Phosphorus (mg/l) 16 8 1.3
NSK Micro Precision Co., Ltd. Fujisawa Plant pH 5.8~8.6 6.0~8.5 7.3~8.1 Kashio River
BOD (mg/l) 60 20 10
COD (mg/l) 60 20 15
Suspended solids (mg/l) 90 25 7
Oil (mg/l) 5 4 0
Matsukawa Plant pH 5.8~8.6 6.0~8.4 6.3~6.7 Katagirimatsu River
BOD (mg/l) 160 20 3.7
COD (mg/l) 160 20 12
Suspended solids (mg/l) 200 25 3
Oil (mg/l) 5 4 0.5
NSK Kyushu Co., Ltd pH 5.8~8.6 6.0~8.5 6.6~8.3 Chikugo River
BOD (mg/l) 60 20 19
COD (mg/l) 60 20 16
Suspended solids (mg/l) 200 25 36
Oil (mg/l) 5 4 0.5
Nitrogen (mg/l) 120 60 33
Phosphorus (mg/l) 16 8 3.8
NSK-Warner K.K. pH 5.8~8.6 6.0~8.4 6.7~7.6 Saka River
BOD (mg/l) 160 20 5.2
COD (mg/l) 160 20 8.4
Suspended solids (mg/l) 200 25 8
Oil (mg/l) 5 4 0
Nitrogen (mg/l) 120 30 6.8
Phosphorus (mg/l) 16 4 0.32
Chitose Sangyo Co., Ltd. pH 5.8~8.6 6.0~8.4 7.3~7.6 Hatsuma River
BOD (mg/l) 160 20 4.3
COD (mg/l) 160 20 9.2
Suspended solids (mg/l) 200 25 13
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 120 60 22
Phosphorus (mg/l) 16 8 2.1
Inoue Jikuuke Kogyo Co., Ltd. Tondabayashi Plant pH 5.8~8.6 6.0~8.5 6.8~7.7 Unada River
BOD (mg/l) 120 20 16
COD (mg/l) 120 20 20
Suspended solids (mg/l) 150 25 22
Oil (mg/l) 4 4 0
Nitrogen (mg/l) 60 50 45
Phosphorus (mg/l) 8 6 1.3
Mihara Plant pH 5.8~8.6 6.0~8.5 7.0~8.0 Higashiyoke River
BOD (mg/l) 120 20 19
COD (mg/l) 120 20 15
Suspended solids (mg/l) 150 25 17
Oil (mg/l) 5.8~8.6 4 1
Nitrogen (mg/l) 60 50 20
Phosphorus (mg/l) 8 6 0.13
Asahi Seiki Co., Ltd. pH 5.8~8.6 6.0~8.5 7.2~7.6 Aida River
BOD (mg/l) 25 20 5.9
COD (mg/l) 160 20 5.9
Suspended solids (mg/l) 30 25 3
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 120 60 8.6
Phosphorus (mg/l) 16 8 0.64
Shinwa Seiko Co., Ltd. Shin-asahi plant pH 6.0~8.5 6.5~8.0 6.8~7.9 Ado River
BOD (mg/l) 70 20 3.3
COD (mg/l) 70 20 6
Suspended solids (mg/l) 90 25 3
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 40 30 16
Phosphorus (mg/l) 2 2 0.1
Kutsuki plant pH 6.0~8.5 6.5~8.0 6.9~9.1 Ado River
BOD (mg/l) 70 20 6
COD (mg/l) 70 20 7.8
Suspended solids (mg/l) 90 25 2
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 40 30 1.1
Phosphorus (mg/l) 2 2 0.16
NSK Machinery Co., Ltd. pH 5.8~8.6 6.0~8.4 7.1~7.9 Showa Marsh
BOD (mg/l) 60 20 3
COD (mg/l) 120 20 4.5
Suspended solids (mg/l) 120 25 6
Oil (mg/l) 5 4 2.5
Nitrogen (mg/l) 60 60 1.3
Phosphorus (mg/l) 8 8 0.1
Amatsuji Steel Ball Mfg. Co., Ltd.  Shiga Works pH 6.5~8.0 6.5~7.8 6.8~7.6 Shiratori River
BOD (mg/l) 20 18 6.6
COD (mg/l) 20 18 7
Suspended solids (mg/l) 30 25 5
Oil (mg/l) 3 2.7 0.5
Nitrogen (mg/l) 12 11 9.7
Phosphorus (mg/l) 1.2 1.1 0.1
AKS East Japan Co., Ltd. pH 5.8~8.6 6.0~8.4 7.6~8.2 Hikichi River
BOD (mg/l) 60 20 7
COD (mg/l) 60 20 6
Suspended solids (mg/l) 90 25 4
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 120 60 2
Phosphorus (mg/l) 16 8 0.7
Kuribayashi Seisakusho Co., Ltd. pH 5.8~8.6 6.0~8.4 7.6~8.2 Chikuma River
BOD (mg/l) 60 20 7
COD (mg/l) 60 20 6
Suspended solids (mg/l) 90 25 4
Oil (mg/l) 5 4 1
Nitrogen (mg/l) 120 60 2
Phosphorus (mg/l) 16 8 0.7

Actual value are the maximum values recorded (ph are minimum and maximum values recorded).

ND: Not detected

Glossary

pH: A measure of hydrogen-ion concentration.
The pH scale indicates the level of acidity or alkalinity of a solution, with pH 7 representing a neutral value.
COD: Chemical oxygen demand.
Used as an indicator to determinate the density of organic water pollutants; indicates the oxygen consumed in order to oxidize the pollutants contained in the water.
BOD:Biochemical oxygen demand.
Used as an indicator to determinate the density of organic water pollutants; indicates the oxygen consumed in order to oxidize the pollutants contained in the water using microbes.