air quality intro

Air Quality

We recognize the potential impacts our operations have on the environment, including air quality. Our strategic positioning in scrap-based EAF steelmaking technology means our operations produce fewer air emissions than the industry sector. CMC strictly follows all air regulations and annually tracks emissions from nitrogen oxides, sulfur oxides, carbon dioxide, methane, nitrous oxide, carbon monoxide, lead, volatile organic compounds and particulate matter. While our EAF mills are closely regulated under federal Clean Air Act permitting requirements, we are motivated to continue reducing our air emissions to minimize our impact. We are confident that the best opportunity to do this lies in our relentless pursuit of energy and raw material efficiency and we continually look for new and innovative technologies to reduce our emissions. We believe that low emissions and efficient operations go hand in hand and have found that as we improve our operational and energy efficiency, emissions decrease as well.

Environmental Footprint (Air Quality) Unit 2024 2023 2022
Nitrogen oxides (NOX) MT 821 857 865
Sulfur oxides (SOOX) MT 461 488 593
Carbon dioxide (CO2) MT 1,031,419 1,008,944 1,078,876
Methane (CH4) MT 132 127 138
Nitrous oxide (N2O) MT 0.68 0.80 0.80
Carbon monoxide (CO) MT 4,634 4,203 4,298
Lead (Pb) kg 1,043 1,184 1,237
Volatile organic compounds (VOCs) MT 220 209 217
Particulate matter (PM) MT 378 344 412
waste intro

Waste

Our company is subject to provisions under federal, state and local laws governing waste. As an EAF steelmaker using recycled steel as the primary raw material in our process, CMC incorporates circular economy principles into our business model to limit waste.

In our manufacturing operations, we capture and recycle coproducts and byproducts such as steel slag used by construction companies as a base materials in highways, asphalt and other products. We capture and recycle 99% of the baghouse dust from our EAF furnaces, which contains zinc and other valuable metals used to create products such as paints, tire rubber and fertilizers.

Environmental Footprint (Waste & Co-Products) Unit 2024 2023 2022
Total waste & co-products MT 1,027,687 1,026,133 1,136,908
Total hazardous waste MT 62,101 62,313 63,635
   Percent total waste % 6.04% 6.1% 5.6%
Total waste recycled % 88.4% 88.6% 89.5%
Significant spills reported # 0 1 0
water intro

Water

Our water use is an important metric, and we have established goals to reduce our overall water intensity. In addition to complying with applicable water laws and regulations, CMC facilities use water in a cascading recycling system to reduce water withdrawal. CMC is subject to the provisions of the Clean Water Act, which imposes restrictions and controls regarding discharges.

Environmental Footprint (Water) Unit 2024 2023 2022
Total water withdrawn m3 6,288,566 6,354,847 6,502,681
   Water withdrawn from public inlet m3 2,283,959 2,115,803 2,238,748
   Water withdrawn from ground water (private well) m3 2,829,560 2,842,069 2,872,075
   Water withdrawn from surface water (stream) m3 1,175,047 1,396,975 1,391,858
Total water discharge m3 1,566,222 2,164,199 1,696,404
Total water consumption m3 4,732,344 4,190,648 4,806,277
Total water withdrawn intensity m3/MT 1.18 1.18 1.13
Water that is recycled or reused
multiple times
% 91.0% 90.1% 88.4%%
Total water withdrawn in high or extremely
high baseline stress area
m3 1,778,847 2,610,138 2,675,505
Water withdrawn in high or extremely
high baseline stress area
% 28% 41% 41%
Total water consumed in high or extremely
high baseline stress area
m3 1,695,705 2,104,272 2,189,788
Water consumed in high or extremely
high baseline stress area
% 36% 50% 46%

Water Use

water splash background
water usage cycle

Goal

Decrease our water withdrawal
intensity by 8%

Water Withdrawal Intensity (m3 / MT )

In 2024, we experienced a water withdrawal intensity of 1.9% over the 2019 baseline.

We recognize that water is a valuable natural resource and our facilities recycle water multiple times throughout our process. The total rate of water recycled in our operations is over 95%, with 5 of our 10 steel mills being zero water discharge facilities. Our water withdrawal intensity level, measured by the amount of water brought into the process per metric ton of steel produced, is just 4% of the steel industry average. We comply with all applicable laws and regulations regarding water use and discharges, including the Clean Water Act in the United States.

Current Progress Towards Goal

2024 2023 2022

Results

2.4%

increase
since 2019*

Based on 2019 baseline value of 1.152 m3/MT.

Water Withdrawal Intensity

96%

lower than the industry average

Water Withdrawal Intensity

(m3 / MT )

CMC Total² Industry Average¹

Results

96%

lower

1 Industry averages taken from the World Steel Association 2020 Water Management policy paper
2 CMC data is 2024 water withdrawal intensity.

land intro

Land Use

As a major recycler of scrap steel, CMC does not own or operate any mining operations, which involve a high risk of negatively affecting biodiversity. By using recycled steel in our manufacturing process, we do not contribute to the mining of virgin iron ore materials, which results in land use changes and possible impacts on biodiversity and wildlife disturbances. While we do not own or operate any forestry operations, we seek opportunities to restore and protect natural habitats.

For instance, CMC Steel Oklahoma created 4,835 linear feet of stream bed with a large, 100-foot-wide riparian zone planted with thousands of native trees and grasses. The stream has created an area where native wildlife can flourish, and the area as a whole is protected from future development.