02L Groundwater Standards Table April 2022

15A NCAC 02L .0202 Groundwater Quality Standards
Disclaimer: This table is intended to provide summary information only. It does not substitute for any written regulation, nor is it a regulation itself.
Effective Date: April 1, 2022 1
Substance Standard (µg/L- unless otherwise indicated)
Acenaphthene 80
Acenaphthylene 200
Acetic acid 5 mg/L
Acetochlor 100
Acetochlor ESA 500
Acetochlor OXA 500
Acetone 6 mg/L
Acetophenone 700
Acrolein 4
Acrylamide 0.008
Alachlor 2
Aldrin 0.002
Anthracene 2 mg/L
Antimony 1
Arsenic 10
Atrazine and chlorotriazine metabolites 3
Barium 700
Benzene 1
Benzo(a)anthracene 0.05
Benzo(a)pyrene 0.005
Benzo(b)fluoranthene 0.05
Benzo(g,h,i)perylene 200
Benzo(k)fluoranthene 0.5
Benzoic acid 30 mg/L
Benzyl alcohol 700
Beryllium 4
15A NCAC 02L .0202 Groundwater Quality Standards
Disclaimer: This table is intended to provide summary information only. It does not substitute for any written regulation, nor is it a regulation itself.
Effective Date: April 1, 2022 2
Substance Standard (µg/L- unless otherwise indicated)
Bis(chloroethyl)ether 0.03
Bis(2-ethylhexyl)phthalate (di(2-ethylhexyl)phthalate) 3
Boron 700
Bromodichloromethane 0.6
Bromoform (tribromomethane) 4
Bromomethane 10
n-Butanol 590
sec-Butanol 10 mg/L
n-Butylbenzene 70
sec-Butylbenzene 70
tert-Butylbenzene 70
Butylbenzyl phthalate 1 mg/L
Cadmium 2
Caprolactam 4 mg/L
Carbofuran 40
Carbon disulfide 700
Carbon tetrachloride 0.3
Chlordane 0.1
Chloride 250 mg/L
Chlorobenzene 50
Chloroethane 3 mg/L
Chloroform (trichloromethane) 70
Chloromethane (methyl chloride) 3
2-Chlorophenol 0.4
2-Chlorotoluene (o-chlorotoluene) 100
15A NCAC 02L .0202 Groundwater Quality Standards
Disclaimer: This table is intended to provide summary information only. It does not substitute for any written regulation, nor is it a regulation itself.
Effective Date: April 1, 2022 3
Substance Standard (µg/L- unless otherwise indicated)
4-Chlorotoluene 24
Chromium 10
Chrysene 5
Cobalt 1
Coliform organisms (total) 1 per 100 mL
Color 15 color units
Copper 1 mg/L
Cyanide (free cyanide) 70
2,4-D (2,4-dichlorophenoxy acetic acid) 70
Dalapon 200
DDD 0.1
DDE 0.1
DDT 0.1
Dibenzo(a,h)anthracene 0.005
1,4-Dibromobenzene 70
Dibromochloromethane 0.4
1,2-Dibromo-3-chloropropane 0.04
Dibutyl phthalate (di-n-butyl phthalate) 700
Dichloroacetic acid 0.7
1,2-Dichlorobenzene (o-dichlorobenzene) 20
1,3-Dichlorobenzene (m-dichlorobenzene) 200
1,4-Dichlorobenzene (p-dichlorobenzene) 6
Dichlorodifluoromethane (Freon-12; Halon) 1 mg/L
1,1-Dichloroethane 6
1,2-Dichloroethane (ethylene dichloride) 0.4
15A NCAC 02L .0202 Groundwater Quality Standards
Disclaimer: This table is intended to provide summary information only. It does not substitute for any written regulation, nor is it a regulation itself.
Effective Date: April 1, 2022 4
Substance Standard (µg/L- unless otherwise indicated)
1,2-Dichloroethene (cis) 70
1,2-Dichloroethene (trans) 100
1,1-Dichloroethylene (vinylidene chloride) 3501
2,4-Dichlorophenol 0.98
1,2-Dichloropropane 0.6
1,3-Dichloropropene (cis and trans
isomers) 0.4
Dieldrin 0.002
Diethylphthalate 6 mg/L
2,4-Dimethylphenol (m-xylenol) 100
2,4-Dinitrotoluene 0.05
2,6-Dinitrotoluene 0.05
Di-n-octyl phthalate 100
Dinoseb 7
1,4-Dioxane (p-dioxane) 3
Dioxin (2,3,7,8-TCDD) 0.0002 ng/L
1,1-Diphenyl (1,1-biphenyl) 400
Diphenyl ether 180
Diquat 20
Dissolved solids (total) 500 mg/L
Disulfoton 0.3
Diundecyl phthalate (Santicizer 711) 100
Endosulfan (includes technical mixture of
alpha and beta isomers) 40

1 1,1-Dichloroethylene (vinylidene chloride, or 1,1 DCE ) was adopted by the Environmental Management Commision in accordance with 15A NCAC 02L .0202 (f) and is above the federal MCL. Where a private drinking water well or public water system is impacted by 1,1 DCE, the applicable standard is 7 ug/L, in accordance with 15A NCAC 02L .0202.
15A NCAC 02L .0202 Groundwater Quality Standards
Disclaimer: This table is intended to provide summary information only. It does not substitute for any written regulation, nor is it a regulation itself.
Effective Date: April 1, 2022 5
Substance Standard (µg/L- unless otherwise indicated)
Endosulfan sulfate 40
Endothall 100
Endrin, total (includes endrin, endrin aldehyde, and endrin ketone) 2
Epichlorohydrin 4
Ethyl acetate 3 mg/L
Ethylbenzene 600
Ethylene dibromide (1,2-dibromoethane) 0.02
Ethylene glycol 10 mg/L
Fluoranthene 300
Fluorene 300
Fluoride 2 mg/L
Foaming agents 500
Formaldehyde 600
Gross alpha (adjusted) particle activity (excludes radium-226 and uranium) 15 pCi/L
Heptachlor 0.008
Heptachlor epoxide 0.004
Heptane 400
Hexachlorobenzene (perchlorobenzene) 0.02
Hexachlorobutadiene 0.4
Hexachlorocyclohexane isomers (technical grade) 0.02
alpha-Hexachlorocyclohexane 0.006
beta-Hexachlorocyclohexane 0.02
gamma-Hexachlorocyclohexane (Lindane) 0.03
n-Hexane 400
15A NCAC 02L .0202 Groundwater Quality Standards
Disclaimer: This table is intended to provide summary information only. It does not substitute for any written regulation, nor is it a regulation itself.
Effective Date: April 1, 2022 6
Substance Standard (µg/L- unless otherwise indicated)
Indeno(1,2,3-cd)pyrene 0.05
Iron 300
Isophorone 40
Isopropyl ether 70
Isopropylbenzene 70
4-Isopropyltoluene 25
Lead 15
Manganese 50
Mercury 1
Methanol 4 mg/L
Methoxychlor 40
Methylene chloride (dichloromethane) 5
Methyl butyl ketone 40
Methyl ethyl ketone (2-butanone) 4 mg/L
Methyl isobutyl ketone 100
Methyl methacrylate 25
1-Methylnapthalene 1
2-Methylnaphthalene 30
2-Methylphenol (o-cresol) 400
3-Methylphenol (m-cresol) 400
4-Methylphenol (p-cresol) 40
Methyl tert-butyl ether (MTBE) 20
Naphthalene 6
Nickel 100
Nitrate (as N) 10 mg/L
Nitrite (as N) 1 mg/L
15A NCAC 02L .0202 Groundwater Quality Standards
Disclaimer: This table is intended to provide summary information only. It does not substitute for any written regulation, nor is it a regulation itself.
Effective Date: April 1, 2022 7
Substance Standard (µg/L- unless otherwise indicated)
N-nitrosodimethylamine 0.0007
Oxamyl 200
Pentachlorophenol 0.3
Petroleum aliphatic carbon fraction class
(C5-C8) 400
Petroleum aliphatic carbon fraction class
(C9-C18) 700
Petroleum aliphatic carbon fraction class
(C19-C36) 10 mg/L
Petroleum aromatics carbon fraction class
(C9-C22) 200
pH 6.5 - 8.5 (no unit)
Phenanthrene 200
Phenol 30
Phorate 1
n-Propylbenzene 70
Propylene glycol 100 mg/L
Pyrene 200
Selenium 20
Silver 20
Simazine 4
Strontium 2 mg/L
Styrene 70
Sulfate 250 mg/L
1,2,4,5-Tetrachlorobenzene 2
1,1,2,2-Tetrachloroethane 0.2
1,1,1,2-Tetrachloroethane 1
Tetrachloroethylene (perchloroethylene;
PCE) 0.7
15A NCAC 02L .0202 Groundwater Quality Standards
Disclaimer: This table is intended to provide summary information only. It does not substitute for any written regulation, nor is it a regulation itself.
Effective Date: April 1, 2022 8
Substance Standard (µg/L- unless otherwise indicated)
2,3,4,6-Tetrachlorophenol 200
Thallium 2
Tin (inorganic forms) 2 mg/L
Toluene 600
Toxaphene 0.03
2,4,5-TP (Silvex) 50
1,2,4-Trichlorobenzene 70
1,1,1-Trichloroethane 200
1,1,2-Trichloroethane 0.6
Trichloroethylene (TCE) 3
Trichlorofluoromethane 2 mg/L
2,4,5-Trichlorophenol 63
2,4,6-Trichlorophenol 4
1,2,3-Trichloropropane 0.005
1,2,4-Trimethylbenzene 400
1,3,5-Trimethylbenzene 400
1,1,2-Trichloro-1,2,2-trifluoroethane (CFC-113) 200 mg/L
Vanadium 7
Vinyl chloride 0.03
Xylenes (o-, m-, p-) 500
Zinc 1 mg/L