Zip Code 97030
📍 Gresham, OR
Toxic Air Emissions Report (2024)
Data Source: EPA TRI (2024) • Updated Nov 2025
115,170.00 lbs
State Score
9
/ 100
National Score
10
/ 100
In 2024, industrial facilities in Gresham, OR released over 115,170.00 lbs of pollutants. The primary source was ONSEMI, which emitted large quantities of Ammonia into the local air. Residents of 97030 face significantly higher exposure risks than the national average.
Top Polluting Facilities
- ONSEMIOwned by: SEMICONDUCTOR COMPONENTS INDUSTRIES LLCAmmonia released to air50,846.00 lbsLBS
- MICROCHIP TECHNOLOGY INCAmmonia released to air34,892.00 lbsLBS
- ONSEMIOwned by: SEMICONDUCTOR COMPONENTS INDUSTRIES LLCOzone released to air11,363.00 lbsLBS
- ONSEMIOwned by: SEMICONDUCTOR COMPONENTS INDUSTRIES LLCHydrogen fluoride released to air7,086.00 lbsLBS
- MICROCHIP TECHNOLOGY INCHydrogen fluoride released to air3,507.00 lbsLBS
- MICROCHIP TECHNOLOGY INCNitric acid released to air2,640.00 lbsLBS
- ONSEMIOwned by: SEMICONDUCTOR COMPONENTS INDUSTRIES LLCNitric acid released to air2,392.00 lbsLBS
- ONSEMIOwned by: SEMICONDUCTOR COMPONENTS INDUSTRIES LLCHydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) released to air1,350.00 lbsLBS
- MICROCHIP TECHNOLOGY INCSulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) released to air727.00 lbsLBS
- ONSEMIOwned by: SEMICONDUCTOR COMPONENTS INDUSTRIES LLCSulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) released to air367.00 lbsLBS
Nearby Pollution Sources (< 20 miles)
- Portland, OR (97217) 13.4 mi awayHeavy Industrial Activity117,539.48 lbsAnnual Emissions
- Portland, OR (97211) 11.4 mi awayHeavy Industrial Activity69,389.03 lbsAnnual Emissions
- Portland, OR (97210) 13.7 mi awayHeavy Industrial Activity44,775.04 lbsAnnual Emissions
Check Nearby Zip Codes
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Protect Your Lungs
Because toxic gases and VOCs were detected in this area (likely from the Ammonia), standard filters are not enough. We strongly recommend an Activated Carbon purifier to adsorb these fumes.
View Recommended Carbon Filters →Chemical Breakdown
Top 5 Pollutants by Weight
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