About These Standards

These indoor air standards are Ohio’s Voluntary Action Program (VAP) generic standards for volatile organic compounds (VOCs) in indoor air. They represent concentrations below which the VAP considers indoor air to be protective of human health for the applicable land use. Values are sourced from the Ohio EPA CIDARS database.

Two land use categories are provided:

Residential - Protective of long-term residential exposure including children
Commercial - Protective of adult worker exposure in a commercial/industrial setting. Commercial values are typically higher (less restrictive) than residential values because they assume shorter exposure duration and adult-only receptors.

All values are in micrograms per cubic meter (ug/m3).

These standards are used during vapor intrusion evaluations to determine whether indoor air concentrations at a VAP property exceed generic standards. If concentrations exceed generic standards, site-specific risk assessment or remediation may be required.

For more information about how VAP standards are derived and how the program works, see the VAP Program Overview.

Indoor Air Standards - VOCs

Showing 101 of 101 chemicals

Chemical	CAS Number	Residential (µg/m³)	Commercial (µg/m³)
Acetaldehyde	75-07-0	9.4	39
Acetone	67-64-1	NL	NL
Acetonitrile	75-05-8	63	260
Acrolein	107-02-8	0.021	0.0876
Acrylic Acid	79-10-7	0.209	0.876
Acrylonitrile	107-13-1	0.4129	1.8
Allyl Alcohol	107-18-6	NL	NL
Allyl Chloride	107-05-1	1.043	4.4
Benzene	71-43-2	3.6	16
Benzotrichloride	98-07-7	NL	NL
Benzyl Chloride	100-44-7	0.573	2.5
Bis(2-chloro-1-methylethyl) Ether	108-60-1	NL	NL
Bromodichloromethane	75-27-4	0.75884	3.3
Bromoform	75-25-2	26	110
Bromomethane	74-83-9	5.2	22
Butadiene, 1,3-	106-99-0	0.9359	4.1
Butanol, N-	71-36-3	NL	NL
Butylbenzene, n-	104-51-8	NL	NL
Carbon Disulfide	75-15-0	730	3,100
Carbon Tetrachloride	56-23-5	4.7	20
Carbonyl Sulfide	463-58-1	100	440
Chlorobenzene	108-90-7	52	220
Chloro-1,3-butadiene, 2-	126-99-8	0.09359	0.4088
Chloroform	67-66-3	1.2	5.3
Chloromethane	74-87-3	94	390
Chloromethyl Methyl Ether	107-30-2	0.04069	0.17774
Crotonaldehyde, trans-	123-73-9	NL	NL
Cumene	98-82-8	420	1,800
Cyclohexane	110-82-7	6,300	26,000
Cyclohexanone	108-94-1	NL	NL
Dibromo-3-chloropropane, 1,2-	96-12-8	0.00169	0.02044
Dibromochloromethane	124-48-1	NL	NL
Dibromoethane, 1,2-	106-93-4	0.04679	0.2044
Dichloro-2-butene, 1,4-	764-41-0	NL	NL
Dichlorodifluoromethane	75-71-8	NL	NL
Dichloroethane, 1,1-	75-34-3	18	77
Dichloroethane, 1,2-	107-06-2	1.1	4.7
Dichloroethylene, 1,1-	75-35-4	210	880
Dichloroethylene, 1,2-cis-	156-59-2	NL	NL
Dichloroethylene, 1,2-trans-	156-60-5	NL	NL
Dichloropropane, 1,2-	78-87-5	4.2	18
Dichloropropane, 1,3-	142-28-9	NL	NL
Dichloropropene, 1,3-	542-75-6	7.01923	31
Dihydrosafrole	94-58-6	2.2	9.4
Dimethylaniline, N,N-	121-69-7	NL	NL
Dimethylformamide	68-12-2	31	130
Dimethylhydrazine, 1,2-	540-73-8	NL	NL
Dioxane, 1,4-	123-91-1	5.6	25
Epoxybutane, 1,2-	106-88-7	21	88
Ethoxyethanol, 2-	110-80-5	NL	NL
Ethyl Acetate	141-78-6	73	310
Ethyl Acrylate	140-88-5	8.3	35
Ethyl Chloride (Chloroethane)	75-00-3	4,200	18,000
Ethyl Ether	60-29-7	NL	NL
Ethyl Methacrylate	97-63-2	NL	NL
Ethylbenzene	100-41-4	11	49
Ethylene Diamine	107-15-3	NL	NL
Ethylene Oxide	75-21-8	0.00338	0.04088
Ethyleneimine	151-56-4	0.00148	0.00645
Formaldehyde	50-00-0	2.2	9.4
Formic Acid	64-18-6	NL	NL
Glycidaldehyde	765-34-4	NL	NL
Hexane, N-	110-54-3	730	3,100
Hydrazine	302-01-2	NL	NL
Isobutyl Alcohol	78-83-1	NL	NL
Methacrylonitrile	126-98-7	NL	NL
Methanol	67-56-1	21,000	88,000
Methyl Ethyl Ketone (2-Butanone)	78-93-3	5,200	22,000
Methyl Hydrazine	60-34-4	NL	NL
Methyl Isobutyl Ketone (4-methyl-2-pentanone)	108-10-1	3,100	13,000
Methyl Isocyanate	624-83-9	1.043	4.4
Methyl Methacrylate	80-62-6	730	3,100
Methyl tert-Butyl Ether (MTBE)	1634-04-4	110	470
Methylene Chloride	75-09-2	630	2,600
Naphthalene	91-20-3	0.826	3.6
Nickel Carbonyl	13463-39-3	NL	NL
Phosgene	75-44-5	0.313	1.3
Propargyl Alcohol	107-19-7	NL	NL
Propionaldehyde	123-38-6	8.3	35
Propylene Oxide	75-56-9	7.6	33
Styrene	100-42-5	1,000	4,400
Tetrachlorobenzene, 1,2,4,5-	95-94-3	NL	NL
Tetrachloroethane, 1,1,1,2-	630-20-6	3.8	17
Tetrachloroethane, 1,1,2,2-	79-34-5	0.48408	2.1
Tetrachloroethylene	127-18-4	42	180
Toluene	108-88-3	5,200	22,000
Trichloroethane, 1,1,1-	71-55-6	5,200	22,000
Trichloroethane, 1,1,2-	79-00-5	1.8	7.7
Trichloroethylene	79-01-6	2.1	8.8
Trichlorofluoromethane	75-69-4	NL	NL
Triethylamine	121-44-8	7.3	31
Vinyl Acetate	108-05-4	210	880
Vinyl Bromide	593-60-2	1.9	8.2
Vinyl Chloride	75-01-4	1.7	28
Xylenes	1330-20-7	100	440
Butylbenzene, sec-^†	135-98-8	NL	NL
Butylbenzene, tert-^†	98-06-6	NL	NL
Chloroacetaldehyde, 2-^†	107-20-0	NL	NL
Dibromomethane (Methylene Bromide)^†	74-95-3	4.2	18
Dimethylhydrazine, 1,1-^†	57-14-7	0.00209	0.00876
Propyl benzene^†	103-65-1	1,000	4,400

† Listed in CIDARS under Supplemental Criteria rather than as an Appendix A generic numerical standard.

Notes

Values are from the Ohio EPA CIDARS database. We verify these values against the source; see our QA process.
Indoor air standards apply to the vapor intrusion pathway. They are separate from ambient outdoor air standards.
Not all chemicals in CIDARS have indoor air values. Chemicals without established indoor air standards are not listed here.
Where a chemical has both a carcinogenic and non-carcinogenic value, the lower (more protective) value is presented as the generic standard.
“NL” in the table indicates no standard has been established for that chemical and land use combination.
For the complete set of VAP standards across all media, see our Ohio groundwater, soil, and vapor intrusion evaluation pages.