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Order amid Chaos


Table 1. Contaminants Regulated Under the Safe Drinking Water Act

Page 1 of 2

.

1976

.

1979

Final Regulations

NPDWRs
12/75;7/76

.

TTHM's
11/79

Summary of
Final Actions

New regs

.

New regs

# in Regulation

22

.

1

Cumulative # of
Regulated
Contaminants

22

.

23

Contaminants
Regulated

2,4-D
2,4,5-TP(Silvex)
arsenic
barium
cadmium
chromium
coliform bacteria
endrin
fluoride
gross alpha
gross beta
12/75;7/76

lead
lindane
mercury
methoxychlor

total
THM's (2)


.

1986

1987

Final Regulations

Fluoride
4/86

Phase I (VOC's)
7/87

Summary of
Final Actions

Revision

New regs

# in Regulation

1

8

Cumulative # of
Regulated
Contaminants

23

31

Contaminants
Regulated

Fluoride

benzene
Carbon tetrachloride
1,2-dichloroethane
p-dichloroethane
1,1-dichloroethane
1,1,1-trichloroethane
trichloroethylene
vinyl chloride (3)


.

1989

1989

Final
Regulations

TCR
6/89

SWTR
6/89

Summary of
Final Actions

Revision

1 Revision
4 New regs

# in Regulation

1

5

Cumulative # of
Regulated
Contaminants

31

35

Contaminants
Regulated

Total
Coliforms(2)

Giardia(4),
turbidity(4),
HPC bacteria(4),
Legionella(4),
viruses(4)


.

1991

1991

Final
Regulations

Phase II
1/91; 7/91

LCR
6/91

Summary of
Final Actions

38 SOC's & IOC's;
11 Revisions
27 New regs

1 Revision
1 New reg

# in Regulation

39

2

Cumulative # of
Regulated
Contaminants

61

62

Contaminants
Regulated

2,4-D
2,4,5-TP
acrylamide(4)
alachlor
aldicarb(5)
aldicarb sulfone(5)
aldicarb sulfoxide(5)
asbestos
atrazine
barium
cadmium
carbofuran
chlordane
(mono) chlorobenzene
chromium
dibromochloropropane
o-dichlorobenzene
cis-1,2-dichloroethylene
trans-1,2-dichloroethylene
1,2-dichloropropane
epichlorohydrin(4)
ethylbenzene
ethylene dibromide
heptachlor
heptachlor epoxide
lindane
mercury (inorganic)
methoxychlor
nitrate
nitrite
total nitrate/nitrite
PCPs
pentachlorophenol
selenium
styrene
tetrachloroethylene
toluene
toxaphene
xylenes

Copper (4)
Lead (4)



.

1992

Final
Regulations

Phase V
7/92

Summary of
Final Actions

23 SOC's & IOC's;
1 Revisions
22 New regs

# in Regulation

23

Cumulative # of
Regulated
Contaminants

84

Contaminants
Regulated

Adipate, di(2-ethylene)
Antimony
Beryllium
Cyanide
Dalapon
Dichloromethane
Dinoseb
Dioxin (2,3,7,8-TCDD)
Diquat
Endothall
Endrin
Glyphosate
hexachlorobenzene
hexachlorocyclope
nickel
oxamyl (vydate)
PAHs (benzo(a)pyren
phthalate, di(2-ethylex
picloram
simazine
thallium
1,2,4-trichlorbenzene
1,1,2-trichloroethane



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