| MATERION BRUSH INC | ELMORE | OH | Beryllium compounds | 283 | 0 | 38,690 | 68.54% | 13.6% | 21.6% | |
| MATERION ADVANCED CHEMICALS | MILWAUKEE | WI | Arsenic compounds | 5 | 0 | 9,629 | 17.06% | 22.6% | 55.1% | |
| MATERION BRUSH INC | ELMORE | OH | 1-Bromopropane | 9,649 | 2,554 | 1,843 | 3.26% | 12.1% | 19.5% | |
| MATERION BRUSH INC | ELMORE | OH | Cobalt | 4 | 0 | 1,780 | 3.15% | 13.6% | 21.6% | |
| MATERION TECHNICAL MATERIALS INC | LINCOLN | RI | Chromium | 1 | 0 | 1,491 | 2.64% | 9.4% | 30.7% | |
| MATERION BRUSH INC | ELMORE | OH | Nickel | 95 | 0 | 1,404 | 2.49% | 13.6% | 21.6% | |
| MATERION BRUSH INC | ELMORE | OH | Chromium | 4 | 0 | 930 | 1.65% | 13.6% | 21.6% | |
| MATERION BRUSH PERFORMANCE ALLOYS | LORAIN | OH | Nickel | 10 | 0 | 274 | 0.49% | 12.6% | 28.1% | |
| MATERION BRUSH INC | ELMORE | OH | Copper | 4,895 | 0 | 104 | 0.18% | 13.4% | 21.1% | |
| MATERION BRUSH INC | SHOEMAKERSVILLE | PA | Nickel | 1 | 0 | 83 | 0.15% | 12.5% | 35.2% | |
| MATERION BRUSH INC | SHOEMAKERSVILLE | PA | Beryllium | 0 | 0 | 79 | 0.14% | 12.5% | 35.2% | |
| MATERION BRUSH INC | ELMORE | OH | Lead | 82 | 0 | 30 | 0.05% | 13.6% | 21.6% | |
| MATERION ADVANCED CHEMICALS | MILWAUKEE | WI | Hydrogen fluoride (Hydrofluoric acid) | 849 | 0 | 29 | 0.05% | 22.6% | 55.1% | |
| MATERION ELECTRONICS MATERIALS | BUFFALO | NY | Nitric acid | 587 | 0 | 28 | 0.05% | 20.0% | 44.4% | |
| MATERION CORP - READING PLANT 2 | LEESPORT | PA | Chromium compounds (except for chromite ore mined in the Transvaal Region of South Africa and the unreacted ore component of the chromite ore processing residue (COPR). COPR is the solid waste remaining after aqueous extraction of oxidized chromite ore that has been combined with soda ash and kiln roasted at approximately 2,000 F.) | 0 | 0 | 19 | 0.03% | 12.7% | 36.5% | |
| MATERION NATURAL RESOURCES INC MILL | DELTA | UT | Beryllium compounds | 17 | 0 | 15 | 0.03% | 14.8% | 20.0% | |
| MATERION BRUSH INC | ELMORE | OH | Nitric acid | 2,641 | 0 | 11 | 0.02% | 13.6% | 21.5% | |
| MATERION BRUSH INC | SHOEMAKERSVILLE | PA | Lead | 2 | 0 | 5 | 0.01% | 12.5% | 35.2% | |
| MATERION BRUSH PERFORMANCE ALLOYS | LORAIN | OH | Lead | 4 | 0 | 3 | 0.00% | 13.2% | 28.4% | |
| MATERION CORP - READING PLANT 2 | LEESPORT | PA | Nickel compounds | 0 | 0 | 1 | 0.00% | 12.7% | 36.5% | |
| MATERION BRUSH PERFORMANCE ALLOYS | LORAIN | OH | Copper | 10 | 0 | 0 | 0.00% | 12.5% | 28.2% | |
| MATERION BRUSH INC | SHOEMAKERSVILLE | PA | Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 3 | 0 | 0 | 0.00% | 12.6% | 35.5% | |
| MATERION ADVANCED MATERIALS TECHNOLOGIES & SERVICES NORTH | ALBUQUERQUE | NM | Silver compounds | 10 | 0 | 0 | 0.00% | 15.6% | 62.6% | |
| MATERION NATURAL RESOURCES INC MILL | DELTA | UT | Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 180,300 | 0 | 0 | 0.00% | 14.8% | 19.9% | |
| MATERION ADVANCED MATERIALS TECHNOLOGIES & SERVICES MESA DEL | ALBUQUERQUE | NM | Nitric acid | 10 | 0 | 0 | 0.00% | 19.3% | 75.3% | |
| MATERION ADVANCED MATERIALS TECHNOLOGIES & SERVICES MESA DEL | ALBUQUERQUE | NM | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 1,000 | 0 | 0 | 0.00% | 19.3% | 75.1% | |
| MATERION NATURAL RESOURCES INC MILL | DELTA | UT | Lead compounds | 1 | 0 | 0 | 0.00% | 14.8% | 20.0% | |
| MATERION NATURAL RESOURCES INC MILL | DELTA | UT | Manganese compounds | 1 | 0 | 0 | 0.00% | 14.8% | 19.9% | |
| MATERION NATURAL RESOURCES INC MILL | DELTA | UT | Hydrogen fluoride (Hydrofluoric acid) | 46 | 0 | 0 | 0.00% | 14.8% | 19.9% | |
| MATERION NATURAL RESOURCES INC MILL | DELTA | UT | Zinc compounds | 1 | 0 | 0 | 0.00% | 14.8% | 19.9% | |