Zip Code 80503

📍 Longmont, CO

Toxic Air Emissions Report (2024)

Data Source: EPA TRI (2024) • Updated Nov 2025

3,593.14 lbs

State Score

/ 100

National Score

/ 100

In 2024, industrial facilities in Longmont, CO released over 3,593.14 lbs of pollutants. The primary source was CEMEX CONSTRUCTION MATERIALS SOUTH LLC, which emitted Ammonia into the local air. Air quality in 80503 is relatively consistent with regional baselines.

Top Polluting Facilities

CEMEX CONSTRUCTION MATERIALS SOUTH LLC

Owned by: CEMEX INC

Ammonia released to air

3,518.00 lbs

LBS
CEMEX CONSTRUCTION MATERIALS SOUTH LLC

Owned by: CEMEX INC

Chromium compounds (except for chromite ore mined in the Transvaal Region) released to air

60 lbs

LBS
CEMEX CONSTRUCTION MATERIALS SOUTH LLC

Owned by: CEMEX INC

Mercury compounds released to air

9.03 lbs

LBS
CEMEX CONSTRUCTION MATERIALS SOUTH LLC

Owned by: CEMEX INC

Lead compounds released to air

6.11 lbs

LBS

Nearby Pollution Sources (< 20 miles)

Fort Lupton, CO (80621) 19.4 mi away

Heavy Industrial Activity

49,692.53 lbs

Annual Emissions
Boulder, CO (80301) 7.8 mi away

Heavy Industrial Activity

26,354.41 lbs

Annual Emissions
Mead, CO (80542) 10.2 mi away

Heavy Industrial Activity

17,431.00 lbs

Annual Emissions

Check Nearby Zip Codes

Report: 80504 Report: 80501

😷

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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