Comparison of EPA’s 2015 Final Updated Human Health AWQC and Previous AWQC

June 2015

1 

Pollutant CAS No.

2015 EPA Human Health AWQC for 

the Consumption of 

Previous EPA Human Health AWQC 

for the Consumption of 

Water + Organism 

(μg/L)

Organism Only 

(μg/L)

Water + Organism

(μg/L)

Organism Only 

(μg/L)

1,1,1-Trichloroethane 71-55-6 10,000 200,000 * --- 

1,1,2,2-Tetrachloroethane 79-34-5 0.2 3 0.17 4

1,1,2-Trichloroethane 79-00-5 0.55 8.9 0.59 16

1,1-Dichloroethylene 75-35-4 300 20,000 330 7,100

1,2,4,5-Tetrachlorobenzene 95-94-3 0.03 0.03 0.97 1.1

1,2,4-Trichlorobenzene 120-82-1 0.071 0.076 35 70

1,2-Dichlorobenzene 95-50-1 1,000 3,000 420 1,300

1,2-Dichloroethane 107-06-2 9.9 650 0.38 37

1,2-Dichloropropane 78-87-5 0.90 31 0.5 15

1,2-Diphenylhydrazine 122-66-7 0.03 0.2 0.036 0.2

1,3-Dichlorobenzene 541-73-1 7 10 320 960

1,3-Dichloropropene 542-75-6 0.27 12 0.34 21

1,4-Dichlorobenzene 106-46-7 300 900 63 190

2,4,5-Trichlorophenol 95-95-4 300 600 1,800 3,600

2,4,6-Trichlorophenol 88-06-2 1.5 2.8 1.4 2.4

2,4-Dichlorophenol 120-83-2 10 60 77 290

2,4-Dimethylphenol 105-67-9 100 3,000 380 850

2,4-Dinitrophenol 51-28-5 10 300 69 5,300

2,4-Dinitrotoluene 121-14-2 0.049 1.7 0.11 3.4

2-Chloronaphthalene 91-58-7 800 1,000 1,000 1,600

2-Chlorophenol 95-57-8 30 800 81 150

2-Methyl-4,6-Dinitrophenol 534-52-1 2 30 13 280

3,3'-Dichlorobenzidine 91-94-1 0.049 0.15 0.021 0.028

3-Methyl-4-Chlorophenol 59-50-7 500 2,000 * * 

Acenaphthene 83-32-9 70 90 670 990

Acrolein 107-02-8 3 400 6 9
Comparison of EPA’s 2015 Final Updated Human Health AWQC and Previous AWQC

June 2015

2 

Pollutant CAS No.

2015 EPA Human Health AWQC for 

the Consumption of 

Previous EPA Human Health AWQC 

for the Consumption of 

Water + Organism 

(μg/L)

Organism Only 

(μg/L)

Water + Organism

(μg/L)

Organism Only 

(μg/L)

Acrylonitrile 107-13-1 0.061 7.0 0.051 0.25

Aldrin 309-00-2 0.00000077 0.00000077 0.000049 0.00005

alpha-Hexachlorocyclohexane (HCH) 319-84-6 0.00036 0.00039 0.0026 0.0049

alpha-Endosulfan 959-98-8 20 30 62 89

Anthracene 120-12-7 300 400 8,300 40,000

Benzene 71-43-2 0.58 - 2.1 16 - 58 0.61 - 2.2 14 - 51

Benzidine 92-87-5 0.00014 0.011 0.000086 0.0002

Benzo(a)anthracene 56-55-3 0.0012 0.0013 0.0038 0.018

Benzo(a)pyrene 50-32-8 0.00012 0.00013 0.0038 0.018

Benzo(b)fluoranthene 205-99-2 0.0012 0.0013 0.0038 0.018

Benzo(k)fluoranthene 207-08-9 0.012 0.013 0.0038 0.018

beta-Hexachlorocyclohexane (HCH) 319-85-7 0.0080 0.014 0.0091 0.017

beta-Endosulfan 33213-65-9 20 40 62 89

Bis(2-Chloro-1-Methylethyl) Ether 108-60-1 200 4,000 1,400 65,000

Bis(2-Chloroethyl) Ether 111-44-4 0.030 2.2 0.03 0.53

Bis(2-Ethylhexyl) Phthalate 117-81-7 0.32 0.37 1.2 2.2

Bis(Chloromethyl) Ether 542-88-1 0.00015 0.017 0.0001 0.00029

Bromoform 75-25-2 7.0 120 4.3 140

Butylbenzyl Phthalate 85-68-7 0.10 0.10 1,500 1,900

Carbon Tetrachloride 56-23-5 0.4 5 0.223 1.6

Chlordane 57-74-9 0.00031 0.00032 0.0008 0.00081

Chlorobenzene 108-90-7 100 800 130 1,600

Chlorodibromomethane 124-48-1 0.80 21 0.4 13

Chloroform 67-66-3 60 2,000 5.7 470

Chlorophenoxy Herbicide (2,4-D) 94-75-7 1,300 12,000 100 --- 

Chlorophenoxy Herbicide (2,4,5-TP) [Silvex] 93-72-1 100 400 10 --- 
Comparison of EPA’s 2015 Final Updated Human Health AWQC and Previous AWQC

June 2015

3 

Pollutant CAS No.

2015 EPA Human Health AWQC for 

the Consumption of 

Previous EPA Human Health AWQC 

for the Consumption of 

Water + Organism 

(μg/L)

Organism Only 

(μg/L)

Water + Organism

(μg/L)

Organism Only 

(μg/L)

Chrysene 218-01-9 0.12 0.13 0.0038 0.018

Cyanide 57-12-5 4 400 140 140

Dibenzo(a,h)anthracene 53-70-3 0.00012 0.00013 0.0038 0.018

Dichlorobromomethane 75-27-4 0.95 27 0.55 17

Dieldrin 60-57-1 0.0000012 0.0000012 0.000052 0.000054

Diethyl Phthalate 84-66-2 600 600 17,000 44,000

Dimethyl Phthalate 131-11-3 2,000 2,000 270,000 1,100,000

Di-n-Butyl Phthalate 84-74-2 20 30 2,000 4,500

Dinitrophenols 25550-58-7 10 1,000 69 5,300

Endosulfan Sulfate 1031-07-8 20 40 62 89

Endrin 72-20-8 0.03 0.03 0.059 0.06

Endrin Aldehyde 7421-93-4 1 1 0.29 0.3

Ethylbenzene 100-41-4 68 130 530 2,100

Fluoranthene 206-44-0 20 20 130 140

Fluorene 86-73-7 50 70 1,100 5,300

gamma-Hexachlorocyclohexane (HCH) 58-89-9 4.2 4.4 0.98 1.8

Heptachlor 76-44-8 0.0000059 0.0000059 0.000079 0.000079

Heptachlor Epoxide 1024-57-3 0.000032 0.000032 0.000039 0.000039

Hexachlorobenzene 118-74-1 0.000079 0.000079 0.00028 0.00029

Hexachlorobutadiene 87-68-3 0.01 0.01 0.44 18

Hexachlorocyclohexane (HCH)-Technical 608-73-1 0.0066 0.010 0.0123 0.0414

Hexachlorocyclopentadiene 77-47-4 4 4 40 1,100

Hexachloroethane 67-72-1 0.1 0.1 1.4 3.3

Indeno(1,2,3-cd)pyrene 193-39-5 0.0012 0.0013 0.0038 0.018

Isophorone 78-59-1 34 1,800 35 960

Methoxychlor 72-43-5 0.02 0.02 100 --- 
Comparison of EPA’s 2015 Final Updated Human Health AWQC and Previous AWQC

June 2015

4 

Pollutant CAS No.

2015 EPA Human Health AWQC for 

the Consumption of 

Previous EPA Human Health AWQC 

for the Consumption of 

Water + Organism 

(μg/L)

Organism Only 

(μg/L)

Water + Organism

(μg/L)

Organism Only 

(μg/L)

Methyl Bromide 74-83-9 100 10,000 47 1,500

Methylene Chloride 75-09-2 20 1,000 4.6 590

Nitrobenzene 98-95-3 10 600 17 690

Pentachlorobenzene 608-93-5 0.1 0.1 1.4 1.5

Pentachlorophenol 87-86-5 0.03 0.04 0.27 3

Phenol 108-95-2 4,000 300,000 10,000 860,000

p,p'-Dichlorodiphenyldichloroethane (DDD) 72-54-8 0.00012 0.00012 0.00031 0.00031

p,p'-Dichlorodiphenyldichloroethylene (DDE) 72-55-9 0.000018 0.000018 0.00022 0.00022

p,p'-Dichlorodiphenyltrichloroethane (DDT) 50-29-3 0.000030 0.000030 0.00022 0.00022

Pyrene 129-00-0 20 30 830 4,000

Tetrachloroethylene (Perchloroethylene) 127-18-4 10 29 0.69 3.3

Toluene 108-88-3 57 520 1,300 15,000

Toxaphene 8001-35-2 0.00070 0.00071 0.00028 0.00028

trans-1,2-Dichloroethylene (DCE) 156-60-5 100 4,000 140 10,000

Trichloroethylene (TCE) 79-01-6 0.6 7 2.5 30

Vinyl Chloride 75-01-4 0.022 1.6 0.025 2.4

*AWQC for this chemical were not provided in EPA’s previous update.