Threshold Limit Values

Standards for limiting worker exposure to airborne contaminants. They are the maximum concentration in air at which it is believed that a particular substance will not produce adverse health effects with repeated daily exposure. It can be a time-weighted average (TLV-TWA), a short-term value (TLV-STEL), or an instantaneous value (TLV-Ceiling). They are expressed either as parts per million (ppm) or milligram per cubic meter (mg/m3).

Year introduced: 2000

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Tree Number(s): N03.706.615.917, N06.850.460.350.600.807

MeSH Unique ID: D020711

Entry Terms:

• Short-Term Exposure Limit
• STEL
• STELs
• TLV-STEL
• TLV STEL
• TLV-STELs
• TLV-Biological Limit Value
• TLV-BLV
• TLV BLV
• TLV-BLVs
• TLV-Time Weighted Average
• TLV-TWA
• TLV TWA
• TLV-TWAs
• TLV-Ceiling
• TLV Ceiling
• TLV-Ceilings

See Also:

• Maximum Allowable Concentration

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Health Care Category
Health Care Economics and Organizations
Social Control, Formal
Legislation as Topic
Threshold Limit Values

All MeSH Categories
Health Care Category
Environment and Public Health
Public Health
Environmental Pollution
Environmental Exposure
Occupational Exposure
Threshold Limit Values