Zip Code 48458

📍 Mount Morris, MI

Toxic Air Emissions Report (2024)

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

1,420.00 lbs

State Score

/ 100

National Score

/ 100

In 2024, industrial facilities in Mount Morris, MI released over 1,420.00 lbs of pollutants. The primary source was MPLX TERMINALS LLC - FLINT MI TERMINAL, which emitted n-Hexane into the local air. Air quality in 48458 is relatively consistent with regional baselines.

Top Polluting Facilities

MPLX TERMINALS LLC - FLINT MI TERMINAL

Owned by: MARATHON PETROLEUM CORP

n-Hexane released to air

460.00 lbs

LBS
MPLX TERMINALS LLC - FLINT MI TERMINAL

Owned by: MARATHON PETROLEUM CORP

Toluene released to air

380.00 lbs

LBS
MPLX TERMINALS LLC - FLINT MI TERMINAL Cancer Risk

Owned by: MARATHON PETROLEUM CORP

Benzene released to air

258.00 lbs

LBS
MPLX TERMINALS LLC - FLINT MI TERMINAL

Owned by: MARATHON PETROLEUM CORP

Xylene (mixed isomers) released to air

145.00 lbs

LBS
MPLX TERMINALS LLC - FLINT MI TERMINAL

Owned by: MARATHON PETROLEUM CORP

Cyclohexane released to air

140.00 lbs

LBS
MPLX TERMINALS LLC - FLINT MI TERMINAL Cancer Risk

Owned by: MARATHON PETROLEUM CORP

Ethylbenzene released to air

29 lbs

LBS
MPLX TERMINALS LLC - FLINT MI TERMINAL

Owned by: MARATHON PETROLEUM CORP

1,2,4-Trimethylbenzene released to air

4 lbs

LBS
MPLX TERMINALS LLC - FLINT MI TERMINAL Cancer Risk

Owned by: MARATHON PETROLEUM CORP

Cumene released to air

3 lbs

LBS
MPLX TERMINALS LLC - FLINT MI TERMINAL Cancer Risk

Owned by: MARATHON PETROLEUM CORP

Naphthalene released to air

1 lbs

LBS

Nearby Pollution Sources (< 20 miles)

Flint, MI (48551) 9.5 mi away

Heavy Industrial Activity

518,129.05 lbs

Annual Emissions
Lapeer, MI (48446) 18.4 mi away

Heavy Industrial Activity

3,201.00 lbs

Annual Emissions
Corunna, MI (48817) 17.8 mi away

Heavy Industrial Activity

2,902.79 lbs

Annual Emissions

Check Nearby Zip Codes

Report: 48455

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Protect Your Lungs

Because toxic gases and VOCs were detected in this area (likely from the Benzene), 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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