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Coal Workers' Pneumoconiosis: Coal Mine Dust Exposures

Respirable coal mine dust: Geometric mean exposures and percent exceeding designated occupational exposure limits by MSHA coal mine district and state, MSHA inspector and mine operator samples, 1979-2003
Table showing Respirable coal mine dust: Geometric mean exposures and percent exceeding designated occupational exposure limits by MSHA coal mine district and state, MSHA inspector and mine operator samples, 1979-2003

- indicates incalculable field.PEL - permissible exposure limitREL - recommended exposure limitGM

Note:  In coal mining, for respirable dust containing less than or equal to 5% quartz, the MSHA PEL is 2 mg/m3 MRE; for respirable dust containing greater than 5% quartz, the MSHA PEL is [(10 mg/m3 MRE) / (% quartz)]. The NIOSH REL of 1 mg/m3 MRE for respirabl

Source:  MSHA coal mine inspector and mine operator dust data.

Reference Number: 2007T02-16

Date Posted: June 2008

Archived Versions:
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