Air Releases by Chemical & Industry
Air Releases By Chemical
This pie chart shows which TRI chemicals were released into the air in the greatest quantities during 2023.
- The chemicals released to air in the greatest quantities during 2023 were:
- Ammonia: Facilities that manufacture nitrogen-based fertilizers accounted for 43% of ammonia air releases.
- Methanol: Most air releases of methanol were from paper manufacturing facilities.
- Sulfuric acid and hydrochloric acid: Electric utilities released more of these chemicals into the air than any other sector.
- For further information on the health effects of chemicals, visit the toxicological profiles created by the Agency for Toxic Substances and Disease Registry (ATSDR).
Air Releases By Industry
This pie chart shows the TRI-covered industry sectors that reported the largest quantities of air releases during 2023.
- Facilities in the chemical manufacturing, paper manufacturing, and electric utilities sectors accounted for the largest air releases of TRI chemicals during 2023. The chemicals released in the largest quantities by these sectors were:
- Chemical manufacturing: ammonia and ethylene.
- Paper manufacturing: methanol.
- Electric utilities: sulfuric acid and ammonia.
This page was published in August 2025 and uses the 2023 TRI National Analysis dataset made public in TRI Explorer in October 2024.