DEQ-CFW_00004615

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Interim Maximum Allowable Concentrations (IN/IAC) shown in the table below are those established
under 15A NCAC 02L .0202. For more information, contact the Division of Water Quality Planning
Section at [phone] or the web site at:
http://portal.ncdenr.org/web/wq/ps/csu/gwstandards
Substance
Concentration
ug/L (unless otherwise noted)
Effective Date
Acetochlor
100
December 1, 2010
Acetochlor ESA
1 mg/L
December 1, 2010
Acetochlor OXA
l mg/L
December 1, 2010
Acetophenone
700
April 1, 2011
Acrolein
4
October 1, 2010
Alachlor
0.4
August 1, 2010
Aldrin
0.002
October 1, 2010
Ammonia
1.5 mg/L
August 1, 2010
Antimony
1
August 1, 2010
Benzaldehyde
700
April 1, 2011
Benzyl Alcohol
700
October 1, 2010
Beryllium
4
October 1, 2010
Bromomethane
1O
August 1, 2010
Butanol, n- (n-butyl alcohol)
700
August 1, 2010
Butanol, sec- (sec -butyl alcohol)
10 mg/l
October 1, 2010
Butanol, tert- (tert-butyl alcohol)
10
June 1, 2011
Carbazole
2
April 1, 2011
4-Chlorotoluene
24
October 1, 2010
Cobalt
1
October 1, 2010
Dalapon
200
August 1, 2010
Dibenzofuran
28
May 24, 1999
1,4-Dibromobenzene
70
August 1, 2010
Dibromomethane
70
October 1. 2010
Dichloroacetic Acid
0.7
October 1, 2010
1,2-Dichloroethylene, mixed isomers
60
October 1, 2010
2,4-Dchlorophenol
0.98
August 1, 2010
DDE
0.1
August 1, 2010
Dinoseb
7
August 1, 2010
Diphenyl ether
100
April 1, 2011
2,4-Dinitrotoluene
0.1
April 1, 2011
Diquat
20
August 1, 2010
NORTH'<I ADMINISTRATIVE 11' Eff. April 1, 2013
DEQ-CFW 00004615

Substance
Concentration
ug/L (unless otherwise noted)
Effective Date
Endosulfan sulfate
40
April 1, 2011
Endothall
100
August 1, 2010
Ethanol (ethyl alcohol)
4 mg/L
April 1, 2011
Ethyl tert-butyl ether (ETBE)
47
April 1, 2011
alpha-Hexachlorocyclohexane
0.006
April 1, 2011
beta-Hexachlorocyclohexane
0.02
April 1, 2011
2-Hexanone
40
April 1, 2011
4-Isopropyltoluene (p-cymene)
25
April 1, 2011
Methyl Isobutyl Ketone
100
December 1, 2010
Methyl methacrylate
25
August 1, 2010
1-Methylnaphthalene
1
April 1, 2011
2-Methyl phenol (o-cresol)
400
April 1, 2011
Perchlorate & Perchlorate Salts
2
December 1, 2010
Perfluorooctanoic acid (PFOA; C8)
2
December 6, 2006
Picramic Acid
0.7
October 1. 2010
Polychlorinated Biphenyls
0.09
October 1, 2010
Propylene Glycol
140 mg/L
July 16, 2012
Tert-Amyl Methyl Ether (TAME)
128
April 11 2011
1,2,4,5-Tetrachlorobenzene
2
August 1, 2010
1, 1, 1,2-Tetrachloroethane
1
August 1, 2010
Thallium
0.2
October 1. 2010
Tin
2 mg/L
October 1, 2010
1,1,2-Trichloroethane
0.6
August 1, 2010
2,4,5-Trichlorophenol
63
October 1, 2010
2,4,6-Trichlorophenol
4
October 1, 2010
Vanadium (excluding vanadium
pentoxide)
0.3
October 1. 2010
Vinyl Acetate
88
October 1, 2010
NORTH'<I ADMINISTRATIVE 11' Eff. April 1, 2013
DEQ-CFW 00004616