Zip Code 21791
📍 Union Bridge, MD
Toxic Air Emissions Report (2024)
Data Source: EPA TRI (2024) • Updated Nov 2025
10,326.02 lbs
State Score
14
/ 100
National Score
36
/ 100
In 2024, industrial facilities in Union Bridge, MD released over 10,326.02 lbs of pollutants. The primary source was HEIDELBERG MATERIALS US CEMENT LLC, which emitted large quantities of Hydrogen sulfide into the local air. Residents of 21791 face significantly higher exposure risks than the national average.
Top Polluting Facilities
- HEIDELBERG MATERIALS US CEMENT LLCOwned by: HEIDELBERG MATERIALS US INCHydrogen sulfide released to air8,000.00 lbsLBS
- HEIDELBERG MATERIALS US CEMENT LLCOwned by: HEIDELBERG MATERIALS US INCAmmonia released to air2,228.00 lbsLBS
- HEIDELBERG MATERIALS US CEMENT LLCOwned by: HEIDELBERG MATERIALS US INCMercury compounds released to air57.02 lbsLBS
- HEIDELBERG MATERIALS US CEMENT LLCOwned by: HEIDELBERG MATERIALS US INCChromium compounds (except for chromite ore mined in the Transvaal Region) released to air16 lbsLBS
- HEIDELBERG MATERIALS US CEMENT LLC Cancer RiskOwned by: HEIDELBERG MATERIALS US INCNickel compounds released to air14 lbsLBS
- HEIDELBERG MATERIALS US CEMENT LLCOwned by: HEIDELBERG MATERIALS US INCLead compounds released to air11 lbsLBS
Nearby Pollution Sources (< 20 miles)
- Hanover, PA (17331) 16.8 mi awayHeavy Industrial Activity61,936.47 lbsAnnual Emissions
- Hampstead, MD (21074) 14.4 mi awayHeavy Industrial Activity51.14 lbsAnnual Emissions
- Littlestown, PA (17340) 11.8 mi awayHeavy Industrial Activity0.479 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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