Site Data (2023 results)
2023 data on the acquisition status of ISO 14001 certification for the SUMCO Group's business sites/plants and regulated substances discharged from each site/plant to the surrounding air and water.
Kyushu Factory (Nagahama)/Kyushu Factory (Kubara)/Kyushu Factory (Saga)
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| Name of business site/plant |
Kyushu Factory (Nagahama) |
Kyushu Factory (Kubara) |
Kyushu Factory (Saga) |
| Scope of business |
Design, development and manufacture of silicon wafers |
Design, development and manufacture of monocrystalline silicon ingots and silicon wafers |
Design, development and manufacture of monocrystalline silicon ingots and silicon wafers |
| Status of acquisition of ISO 14001:2015 certification |
Examining organization |
Japan Quality Assurance Organization |
Japan Quality Assurance Organization |
Japan Quality Assurance Organization |
| Date of acquisition |
January 11, 1999 |
January 11, 1999 |
January 11, 1999 |
| Date of renewal |
January 11, 2026 |
January 11, 2026 |
January 11, 2026 |
| Air |
Measurement results maximum value (regulation value) |
| Nitrogen oxides (NOx) |
ppm |
Boiler 64 (150) |
Boiler 64 (150) |
/ |
| Sulfur oxides (SOx) |
m3N/h |
Boiler ND (0.44-0.85) |
Boiler ND (1.15) |
/ |
| Soot and dust |
g/m3N |
/ |
/ |
/ |
| Water |
Regulation value |
Measure-
ment result (Maximum value) |
Regulation value |
Measure-
ment result (Maximum value) |
Regulation value |
Measure-
ment result (Maximum value) |
| Biological oxygen demand (BOD*1) |
mg/ℓ |
/ |
/ |
/ |
/ |
20 |
7 |
| Chemical oxygen demand (COD*2) |
mg/ℓ |
30 |
11 |
30 |
6 |
/ |
/ |
| Suspended solids (SS) |
mg/ℓ |
30 |
14 |
30 |
7 |
25 |
8 |
| N-hexane extract |
mg/ℓ |
5 |
ND |
5 |
ND |
3 |
ND |
| Iodine consumption |
mg/ℓ |
/ |
/ |
/ |
/ |
/ |
/ |
| Fluorine and its compounds |
mg/ℓ |
8 |
5.4 |
8 |
1.7 |
3 |
0.9 |
| Ammoniac nitrogen |
mg/ℓ |
80 |
14 |
80 |
12 |
100 |
13 |
| Nitrate nitrogen |
mg/ℓ |
| Nitrite-nitrogen |
mg/ℓ |
| Nitrogen content (T-N) |
mg/ℓ |
120 |
33 |
120 |
17 |
120 |
16 |
| Chromium content (T-Cr) |
mg/ℓ |
0.2 |
ND |
0.2 |
ND |
0.2 |
ND |
| Phosphorus content (T-P) |
mg/ℓ |
12 |
0.3 |
12 |
0.1 |
16 |
0.7 |
| Arsenic |
mg/ℓ |
0.05 |
ND |
0.05 |
ND |
0.1 |
/ |
Trichloroe-
thylene |
mg/ℓ |
0.1 |
ND |
0.1 |
ND |
0.1 |
/ |
- *1In case of discharging treated wastewater into the river, the drainage restriction of biological oxygen demand (BOD) applies.
- *2In case of discharging treated wastewater into the sea, the drainage restriction of chemical oxygen demand (COD) applies.
- * Numbers list the maximum annual figures.
"/" denotes non-applicability
"-" denotes an unmeasured item as the regulated substance is not used.
"ND" denotes non-detection
Noda Office/Yonezawa Plant
| Name of business site/plant |
Noda Office |
Yonezawa Plant |
| Scope of business |
Manufacture of silicon wafers |
Design, development and manufacture of monocrystalline silicon ingots |
| Status of acquisition of ISO 14001:2015 certification |
Examining organization |
Japan Quality Assurance Organization |
Japan Quality Assurance Organization |
| Date of acquisition |
January 11, 1999 |
January 11, 1999 |
| Date of renewal |
January 11, 2026 |
January 11, 2026 |
| Air |
Measurement results maximum value (regulation value) |
| Nitrogen oxides (NOx) |
ppm |
Boiler 64 (260) |
/ |
| Sulfur oxides (SOx) |
m3N/h |
Boiler 0.02 (0.32) |
/ |
| Soot and dust |
g/m3N |
Boiler 0.005 (0.3) |
/ |
| Water |
Regulation value |
Measurement result (Maximum value) |
Regulation value |
Measurement result (Maximum value) |
| Biological oxygen demand (BOD) |
mg/ℓ |
25 |
15 |
600 |
18 |
| Chemical oxygen demand (COD) |
mg/ℓ |
20*1 |
14 |
/ |
/ |
| Suspended solids (SS) |
mg/ℓ |
50 |
12 |
600 |
39 |
| N-hexane extract |
mg/ℓ |
3 |
ND |
5 |
1 |
| Iodine consumption |
mg/ℓ |
/ |
/ |
220 |
4 |
| Fluorine and its compounds |
mg/ℓ |
8 |
5.6 |
8*2 |
2.1 |
| Ammoniac nitrogen |
mg/ℓ |
100 |
6 |
380 |
124 |
| Nitrate nitrogen |
mg/ℓ |
| Nitrite-nitrogen |
mg/ℓ |
| Nitrogen content (T-N) |
mg/ℓ |
30 |
14 |
/ |
/ |
| Chromium content (T-Cr) |
mg/ℓ |
1 |
ND |
0.5 |
ND |
| Phosphorus content (T-P) |
mg/ℓ |
2 |
0.2 |
/ |
/ |
| Arsenic |
mg/ℓ |
0.05 |
ND |
0.1 |
ND |
| Trichloroethylene |
mg/ℓ |
0.1 |
ND |
/ |
/ |
- *1At the Noda office, since Tokyo Bay pollutant load restrictions apply, it is also subject to chemical oxygen demand (COD) restrictions.
- *2At the Yonezawa Plant, treated wastewater is discharged into public sewerage systems and is thus subject to the Sewerage Act. (Destination of treated waste water outflowing from sewerage treatment site: river) Accordingly, the regulation value for fluoridation compound is 8 mg/ℓ.
Chitose Plant/JSQ Division
| Name of business site/plant |
Chitose Plant |
JSQ Division |
| Scope of business |
Design, development and manufacture of silicon wafers |
Design, development and manufacture of quartz crucibles |
| Status of acquisition of ISO 14001:2015 certification |
Examining organization |
Japan Quality Assurance Organization |
Japan Quality Assurance Organization |
| Date of acquisition |
January 11, 1999 |
January 11, 1999 |
| Date of renewal |
January 11, 2026 |
January 11, 2026 |
| Air |
Measurement results maximum value (regulation value) |
| Nitrogen oxides (NOx) |
ppm |
/ |
/ |
| Sulfur oxides (SOx) |
m3N/h |
/ |
/ |
| Soot and dust |
g/m3N |
/ |
Firing furnace 0.18 (0.2) |
| Water |
Regulation value |
Measurement result (Maximum value) |
Regulation value |
Measurement result (Maximum value) |
| Biological oxygen demand (BOD) |
mg/ℓ |
600 |
ND |
120 |
13 |
| Chemical oxygen demand (COD) |
mg/ℓ |
/ |
/ |
/ |
/ |
| Suspended solids (SS) |
mg/ℓ |
600 |
7 |
150 |
17 |
| N-hexane extract |
mg/ℓ |
5 |
4.00 |
5 |
ND |
| Iodine consumption |
mg/ℓ |
/ |
/ |
/ |
/ |
| Fluorine and its compounds |
mg/ℓ |
8* |
4.3 |
8 |
0.2 |
| Ammoniac nitrogen |
mg/ℓ |
/ |
/ |
100 |
4 |
| Nitrate nitrogen |
mg/ℓ |
| Nitrite-nitrogen |
mg/ℓ |
| Nitrogen content (T-N) |
mg/ℓ |
/ |
/ |
60 |
5 |
| Chromium content (T-Cr) |
mg/ℓ |
2 |
ND |
2 |
ND |
| Phosphorus content (T-P) |
mg/ℓ |
/ |
/ |
8 |
0.2 |
| Arsenic |
mg/ℓ |
/ |
/ |
0.1 |
ND |
| Trichloroethylene |
mg/ℓ |
/ |
/ |
0.1 |
ND |
- *At the Chitose Plant, treated wastewater is discharged into public sewerage systems and is thus subject to the Sewerage Act. (Destination of treated wastewater out flowing from sewerage treatment site: river) Accordingly, the regulation value for fluoridation compound is 8 mg/ℓ.
SUMCO TECHXIV Corporation Nagasaki Plant/SUMCO TECHXIV Corporation Miyazaki Plant
| Name of business site/plant |
SUMCO TECHXIV Corporation (STC) Nagasaki Plant |
SUMCO TECHXIV Corporation (STC) Miyazaki Plant |
| Scope of business |
Design, development and manufacture of monocrystalline silicon ingots and silicon wafers |
Design, development and manufacture of monocrystalline silicon ingots and silicon wafers |
| Status of acquisition of ISO 14001:2015 certification |
Examining organization |
Japan Quality Assurance Organization |
Japan Quality Assurance Organization |
| Date of acquisition |
January 11, 1999 |
January 11, 1999 |
| Date of renewal |
January 11, 2026 |
January 11, 2026 |
| Air |
Measurement results maximum value (regulation value) |
| Nitrogen oxides (NOx) |
ppm |
Boiler 80 (260) |
Boiler 53 (150) |
| Sulfur oxides (SOx) |
m3N/h |
Boiler ND (1.43-2.41) |
/ |
| Soot and dust |
g/m3N |
Boiler ND (0.3) |
Boiler ND (0.1)*2 |
| Water |
Regulation value |
Measurement result |
Regulation value |
Measurement result |
| Biological oxygen demand (BOD) |
mg/ℓ |
600 |
49 |
25 |
6 |
| Chemical oxygen demand (COD) |
mg/ℓ |
/ |
/ |
/ |
/ |
| Suspended solids (SS) |
mg/ℓ |
600 |
20 |
30 |
1 |
| N-hexane extract |
mg/ℓ |
5 |
ND |
5 |
ND |
| Iodine consumption |
mg/ℓ |
/ |
/ |
/ |
/ |
| Fluorine and its compounds |
mg/ℓ |
15*1 |
8.9 |
8 |
0.3 |
| Ammoniac nitrogen |
mg/ℓ |
100 |
45 |
100 |
3 |
| Nitrate nitrogen |
mg/ℓ |
| Nitrite-nitrogen |
mg/ℓ |
| Nitrogen content (T-N) |
mg/ℓ |
240 |
80 |
120 |
2 |
| Chromium content (T-Cr) |
mg/ℓ |
2 |
ND |
2 |
ND |
| Phosphorus content (T-P) |
mg/ℓ |
32 |
0.2 |
16 |
ND |
| Arsenic |
mg/ℓ |
0.1 |
0.002 |
/ |
/ |
| Trichloroethylene |
mg/ℓ |
0.3 |
ND |
/ |
/ |
- *1At STC Nagasaki plant, treated wastewater is discharged into public sewerage systems and is thus subject to the Sewerage Act. (Destination of treated wastewater outflowing from sewerage treatment site: the sea) Accordingly, the regulation value for fluoridation compound is 15 mg/ℓ.
- *2The frequency of atmospheric soot and dust measurements at STC Miyazaki was revised to once every five years (the next measurement will be taken in 2023).
SUMCO Phoenix Corporation Albuquerque Plant/SUMCO Phoenix Corporation Phoenix Plant
| Name of business site/plant |
SUMCO Phoenix Corporation (SPX) Albuquerque Plant |
SUMCO Phoenix Corporation (SPX) Phoenix Plant |
| Scope of business |
Design, development and manufacture of silicon wafers |
Design, development and manufacture of monocrystalline silicon ingots and silicon wafers |
| Status of acquisition of ISO 14001:2015 certification |
Examining organization |
DNV |
DNV |
| Date of acquisition |
June 19, 2000 |
June 19, 2000 |
| Date of renewal |
June 30, 2024 |
June 30, 2024 |
| Air |
Measurement results maximum value (regulation value) |
| Nitrogen oxides (NOx) |
ton/y |
2.08 (9.21) |
12.11 (24.6) |
| Sulfur oxides (SOx) |
ton/y |
0.024 (0.351) |
0.49 (1.25) |
| PM10 (Particulate Matter) |
ton/y |
0.157 (0.68) |
0.69 (2.5) |
| Water |
Regulation value |
Measurement result* |
Regulation value |
Measurement result (Maximum value) |
| Biological oxygen demand (BOD) |
mg/ℓ |
/ |
/ |
/ |
/ |
| Chemical oxygen demand (COD) |
mg/ℓ |
/ |
/ |
/ |
/ |
| Arsenic |
mg/ℓ |
2.09 |
/ |
0.13 |
0.01 |
| Cadmium |
mg/ℓ |
/ |
/ |
0.047 |
0.002 |
| Copper |
mg/ℓ |
/ |
/ |
1.5 |
0.04 |
| Cyanide |
mg/ℓ |
0.5 |
/ |
2 |
0.02 |
| Fluorine and its compounds |
mg/ℓ |
36 |
/ |
/ |
/ |
| Lead |
mg/ℓ |
1 |
/ |
0.41 |
0.01 |
| Mercury |
mg/ℓ |
0.004 |
/ |
0.0023 |
0.0002 |
| Molybdenum |
mg/ℓ |
2 |
/ |
/ |
/ |
| Selenium |
mg/ℓ |
0.46 |
/ |
0.1 |
0.01 |
| Silver |
mg/ℓ |
5 |
/ |
1.2 |
0.005 |
| Zinc |
mg/ℓ |
2.2 |
/ |
3.5 |
0.05 |
| Suspended solids (SS) |
mg/ℓ |
/ |
/ |
/ |
/ |
- *At the Albuquerque Plant, only pH and water flow rate measurements are required, and the City of Albuquerque periodically takes wastewater measurements.
PT. SUMCO Indonesia、FORMOSA SUMCO TECHNOLOGY CORPORATION
| Name of business site/plant |
PT. SUMCO Indonesia |
FORMOSA SUMCO TECHNOLOGY CORPORATION |
| Scope of business |
Design, development and manufacture of silicon wafers |
Design, development and manufacture of monocrystalline silicon ingots and silicon wafers |
| Status of acquisition of ISO 14001:2015 certification |
Examining organization |
SGS |
Lloyd's Register |
| Date of acquisition |
April 22, 2005 |
May 13, 2019 |
| Date of renewal |
April 22, 2026 |
May 13, 2025 |
| Air |
Indonesia |
FORMOSA
SUMCO
TECHNOLOGY |
Measurement results maximum value (regulation value) |
Measurement results maximum value (regulation value) |
| Nitrogen oxides (NOx) |
mg/m3 |
ton/y |
ND（1000） |
13.204 (40.5) |
| Sulfur oxides (SOx) |
mg/m3 |
ton/y |
ND（800） |
／ |
| PM10 (Particulate Matter) |
mg/m3 |
ton/y |
5.3 (350) |
0.854 (1.82) |
| Water |
Regulation value |
Measurement result (Maximum value) |
Regulation value |
Measurement result (Maximum value) |
| Biological oxygen demand (BOD) |
mg/ℓ |
150 |
21 |
/ |
/ |
| Chemical oxygen demand (COD) |
mg/ℓ |
300 |
69 |
100 |
6.2 |
| Arsenic |
mg/ℓ |
0.2 |
0.001 |
0.35 |
ND |
| Cadmium |
mg/ℓ |
0.1 |
ND |
0.02 |
ND |
| Copper |
mg/ℓ |
4 |
ND |
1.5 |
ND |
| Cyanide |
mg/ℓ |
0.1 |
ND |
1 |
ND |
| Fluorine and its compounds |
mg/ℓ |
4 |
0.87 |
15 |
4.7 |
| Lead |
mg/ℓ |
0.2 |
ND |
0.5 |
ND |
| Mercury |
mg/ℓ |
0.004 |
ND |
0.005 |
ND |
| Molybdenum |
mg/ℓ |
/ |
/ |
0.6 |
0.009 |
| Selenium |
mg/ℓ |
0.1 |
ND |
/ |
/ |
| Silver |
mg/ℓ |
/ |
/ |
/ |
/ |
| Zinc |
mg/ℓ |
10 |
ND |
3.5 |
0.125 |
| Suspended solids (SS) |
mg/ℓ |
400 |
6.4 |
30 |
4.2 |
- *At PT.SUMCO Indonesia, wastewater is drained to the sewerage.
- *At FORMOSA SUMCO TECHNOLOGY CORPORATION, wastewater is drained into the ocean.
