Site Data (2024 results)
2024 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 69 (150) |
Boiler 53 (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 |
4 |
| Chemical oxygen demand (COD*2) |
mg/ℓ |
30 |
10 |
30 |
6 |
/ |
/ |
| Suspended solids (SS) |
mg/ℓ |
30 |
9 |
30 |
8 |
50 |
3 |
| N-hexane extract |
mg/ℓ |
5 |
ND |
5 |
ND |
3 |
ND |
| Iodine consumption |
mg/ℓ |
/ |
/ |
/ |
/ |
/ |
/ |
| Fluorine and its compounds |
mg/ℓ |
8 |
3 |
8 |
2 |
3 |
1 |
| Ammoniac nitrogen |
mg/ℓ |
80 |
14 |
80 |
14 |
100 |
4 |
| Nitrate nitrogen |
mg/ℓ |
| Nitrite-nitrogen |
mg/ℓ |
| Nitrogen content (T-N) |
mg/ℓ |
120 |
35 |
120 |
18 |
120 |
8 |
| Chromium content (T-Cr) |
mg/ℓ |
0.2 |
ND |
0.2 |
ND |
0.3 |
ND |
| Phosphorus content (T-P) |
mg/ℓ |
12 |
0.2 |
12 |
0.1 |
16 |
0.3 |
| Arsenic |
mg/ℓ |
0.05 |
ND |
0.05 |
ND |
0.1 |
ND |
Trichloroe-
thylene |
mg/ℓ |
0.1 |
ND |
0.1 |
ND |
0.1 |
ND |
- *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 66 (218) |
/ |
| Sulfur oxides (SOx) |
m3N/h |
Boiler 0.02 (0.32) |
/ |
| Soot and dust |
g/m3N |
Boiler 0.004 (0.3) |
/ |
| Water |
Regulation value |
Measurement result (Maximum value) |
Regulation value |
Measurement result (Maximum value) |
| Biological oxygen demand (BOD) |
mg/ℓ |
25 |
12 |
600 |
28 |
| Chemical oxygen demand (COD) |
mg/ℓ |
25*1 |
9 |
/ |
/ |
| Suspended solids (SS) |
mg/ℓ |
50 |
10 |
600 |
83 |
| N-hexane extract |
mg/ℓ |
3 |
ND |
5 |
1 |
| Iodine consumption |
mg/ℓ |
/ |
/ |
220 |
3 |
| Fluorine and its compounds |
mg/ℓ |
8 |
5 |
8*2 |
3 |
| Ammoniac nitrogen |
mg/ℓ |
100 |
7 |
380 |
162 |
| Nitrate nitrogen |
mg/ℓ |
| Nitrite-nitrogen |
mg/ℓ |
| Nitrogen content (T-N) |
mg/ℓ |
30 |
12 |
/ |
/ |
| Chromium content (T-Cr) |
mg/ℓ |
1 |
ND |
2 |
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 |
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 0.08 (0.2) |
| Water |
Regulation value |
Measurement result (Maximum value) |
Regulation value |
Measurement result (Maximum value) |
| Biological oxygen demand (BOD) |
mg/ℓ |
600 |
2 |
120 |
8 |
| Chemical oxygen demand (COD) |
mg/ℓ |
/ |
/ |
/ |
/ |
| Suspended solids (SS) |
mg/ℓ |
600 |
5 |
150 |
19 |
| N-hexane extract |
mg/ℓ |
5 |
ND |
5 |
ND |
| Iodine consumption |
mg/ℓ |
/ |
/ |
/ |
/ |
| Fluorine and its compounds |
mg/ℓ |
8* |
3 |
8 |
1 |
| Ammoniac nitrogen |
mg/ℓ |
/ |
/ |
100 |
4 |
| Nitrate nitrogen |
mg/ℓ |
| Nitrite-nitrogen |
mg/ℓ |
| Nitrogen content (T-N) |
mg/ℓ |
/ |
/ |
60 |
4 |
| Chromium content (T-Cr) |
mg/ℓ |
2 |
ND |
2 |
ND |
| Phosphorus content (T-P) |
mg/ℓ |
/ |
/ |
8 |
0.1 |
| 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 68 (260) |
Boiler 50 (150) |
| Sulfur oxides (SOx) |
m3N/h |
Boiler ND (1.43-2.41) |
/ |
| Soot and dust |
g/m3N |
Boiler ND (0.3) |
Boiler / (0.1)*2 |
| Water |
Regulation value |
Measurement result (maximum value) |
Regulation value |
Measurement result (maximum value) |
| Biological oxygen demand (BOD) |
mg/ℓ |
600 |
32 |
25 |
7 |
| Chemical oxygen demand (COD) |
mg/ℓ |
/ |
/ |
/ |
/ |
| Suspended solids (SS) |
mg/ℓ |
600 |
18 |
30 |
3 |
| N-hexane extract |
mg/ℓ |
5 |
ND |
5 |
ND |
| Iodine consumption |
mg/ℓ |
220 |
ND |
/ |
/ |
| Fluorine and its compounds |
mg/ℓ |
15*1 |
9 |
8 |
1 |
| Ammoniac nitrogen |
mg/ℓ |
100 |
22 |
100 |
5 |
| Nitrate nitrogen |
mg/ℓ |
| Nitrite-nitrogen |
mg/ℓ |
| Nitrogen content (T-N) |
mg/ℓ |
240 |
58 |
120 |
5 |
| 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 |
0.001 |
0.1 |
/ |
| Trichloroethylene |
mg/ℓ |
0.3 |
ND |
0.1 |
/ |
- *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 2028).
High-Purity Silicon Corporation (HSJ) Yokkaichi Plant/High-Purity Silicon Corporation (HSJ) Suzuka Plant
| Name of business site/plant |
High-Purity Silicon Corporation (HSJ) Yokkaichi |
High-Purity Silicon Corporation (HSJ) Suzuka |
| Scope of business |
Manufacture and sale of polycrystalline silicon for semiconductors and high-purity chlorosilanes |
Manufacture and sale of polycrystalline silicon for semiconductors and high-purity chlorosilanes |
| Status of acquisition of ISO 14001:2015 certification |
Examining organization |
Bureau Veritas Japan Co., Ltd. |
Bureau Veritas Japan Co., Ltd. |
| Date of acquisition |
May 21, 2001 |
May 21, 2001 |
| Date of renewal |
November 21, 2024 |
November 21, 2024 |
| Air |
Measurement results maximum value (regulation value) |
| Nitrogen oxides (NOx) |
ppm |
Boiler 42 (120) |
/ |
| Sulfur oxides (SOx) |
m3N/h |
/ |
/ |
| Soot and dust |
g/m3N |
Boiler - (0.05) |
/ |
| Water |
Regulation value |
Measurement result |
Regulation value |
Measurement result |
| Biological oxygen demand (BOD) |
mg/ℓ |
/ |
/ |
25 |
6 |
| Chemical oxygen demand (COD) |
mg/ℓ |
130 |
16 |
/ |
/ |
| Suspended solids (SS) |
mg/ℓ |
180 |
7 |
90 |
4 |
| N-hexane extract_Mineral oil |
mg/ℓ |
5 |
ND |
5 |
ND |
| Iodine consumption |
mg/ℓ |
/ |
/ |
/ |
/ |
| Fluorine and its compounds |
mg/ℓ |
12 |
2.9 |
8 |
2.2 |
| Ammoniac nitrogen |
mg/ℓ |
80 |
17 |
100 |
5 |
| Nitrate nitrogen |
mg/ℓ |
| Nitrite-nitrogen |
mg/ℓ |
| Nitrogen content (T-N) |
mg/ℓ |
80 |
17 |
120 |
6 |
| Chromium content (T-Cr) |
mg/ℓ |
/ |
/ |
/ |
/ |
| Phosphorus content (T-P) |
mg/ℓ |
4 |
19.0 |
/ |
0.6 |
| Arsenic |
mg/ℓ |
/ |
/ |
/ |
/ |
| Trichloroethylene |
mg/ℓ |
0.1 |
ND |
/ |
/ |
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 27, 2027 |
June 27, 2027 |
| Air |
Measurement results maximum value (regulation value) |
| Nitrogen oxides (NOx) |
ton/y |
0.15 (9.21) |
1.01 (24.65) |
| Sulfur oxides (SOx) |
ton/y |
0.001 (0.35) |
0.04 (1.25) |
| PM10 (Particulate Matter) |
ton/y |
0.012 (0.68) |
0.07 (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 |
/ |
/ |
0.017 |
0.13 |
| Cadmium |
mg/ℓ |
/ |
/ |
ND |
0.047 |
| Copper |
mg/ℓ |
/ |
/ |
0.143 |
1.50 |
| Cyanide |
mg/ℓ |
/ |
/ |
ND |
2.00 |
| Fluorine and its compounds |
mg/ℓ |
/ |
/ |
/ |
/ |
| Lead |
mg/ℓ |
/ |
/ |
ND |
0.41 |
| Mercury |
mg/ℓ |
/ |
/ |
ND |
0.0002 |
| Molybdenum |
mg/ℓ |
/ |
/ |
/ |
/ |
| Selenium |
mg/ℓ |
/ |
/ |
ND |
0.01 |
| Silver |
mg/ℓ |
/ |
/ |
ND |
1.2 |
| Zinc |
mg/ℓ |
/ |
/ |
0.01 |
3.5 |
| 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） |
4.45 (40.5) |
| Sulfur oxides (SOx) |
mg/m3 |
ton/y |
ND（800） |
/ |
| PM10 (Particulate Matter) |
mg/m3 |
ton/y |
5.3 (350) |
0.261 (1.82) |
| Water |
Regulation value |
Measurement result (Maximum value) |
Regulation value |
Measurement result (Maximum value) |
| Biological oxygen demand (BOD) |
mg/ℓ |
200 |
84 |
/ |
/ |
| Chemical oxygen demand (COD) |
mg/ℓ |
400 |
281 |
100 |
6.2 |
| Arsenic |
mg/ℓ |
0.2 |
ND |
0.35 |
ND |
| Cadmium |
mg/ℓ |
0.1 |
ND |
0.02 |
ND |
| Copper |
mg/ℓ |
4 |
0.05 |
1.5 |
ND |
| Cyanide |
mg/ℓ |
0.1 |
0.03 |
1 |
ND |
| Fluorine and its compounds |
mg/ℓ |
4 |
2.7 |
15 |
4.7 |
| Lead |
mg/ℓ |
0.2 |
ND |
0.5 |
ND |
| Mercury |
mg/ℓ |
0.004 |
0.002 |
0.005 |
ND |
| Molybdenum |
mg/ℓ |
/ |
/ |
0.6 |
0.009 |
| Selenium |
mg/ℓ |
/ |
/ |
/ |
/ |
| Silver |
mg/ℓ |
/ |
/ |
/ |
/ |
| Zinc |
mg/ℓ |
10 |
0.11 |
3.5 |
0.100 |
| Suspended solids (SS) |
mg/ℓ |
400 |
79.1 |
30 |
4.2 |
- *At PT.SUMCO Indonesia, wastewater is drained to the sewerage.
- *At FORMOSA SUMCO TECHNOLOGY CORPORATION, wastewater is drained into the ocean.
High-Purity Silicon America Corporation
| Name of business site/plant |
High-Purity Silicon America Corporation (HSA) |
| Scope of business |
Manufacture and sale of polycrystalline silicon for semiconductors and high-purity chlorosilanes |
| Status of acquisition of ISO 14001:2015 certification |
Examining organization |
Intertek |
| Date of acquisition |
October 23, 2003 |
| Date of renewal |
September 12, 2027 |
| Air |
Measurement results maximum value (regulation value) |
| Nitrogen oxides (NOx) |
ton/y |
6.45 (97) |
| Sulfur oxides (SOx) |
ton/y |
/ |
| PM10 (Particulate Matter) |
ton/y |
/ |
| Water |
Regulation value |
Measurement result |
| Biological oxygen demand (BOD) |
mg/ℓ |
280 |
6 |
| Chemical oxygen demand (COD) |
mg/ℓ |
/ |
/ |
| Arsenic |
mg/ℓ |
/ |
/ |
| Cadmium |
mg/ℓ |
0.005 |
ND |
| Copper |
mg/ℓ |
1.3 |
ND |
| Cyanide |
mg/ℓ |
0.2 |
ND |
| Fluorine and its compounds |
mg/ℓ |
4 |
ND |
| Lead |
mg/ℓ |
/ |
/ |
| Mercury |
mg/ℓ |
0.002 |
ND |
| Molybdenum |
mg/ℓ |
/ |
/ |
| Selenium |
mg/ℓ |
0.05 |
ND |
| Silver |
mg/ℓ |
/ |
/ |
| Zinc |
mg/ℓ |
1.6 |
ND |
| Suspended solids (SS) |
mg/ℓ |
250 |
13 |
