GUAM WATERWORKS AUTHORITY
Water Quality Report
1996-1997

PARAMETER

UNIT

MCL1

DL2

MIN3

MAX4

MIN3

MAX4

GROUND WATER

SURFACE WATER

Regulated VOCs

Benzene

mg/l

0.005

0.0005

nd5

nd

nd

nd

Carbon tetrachloride

mg/l

0.005

0.0005

nd

0.0007

nd

nd

1,2-Dichloroethane

mg/l

0.005

0.0005

nd

nd

nd

nd

1,1-Dichloroethylene

mg/l

0.007

0.0005

nd

nd

nd

nd

para-Dichlorobenzene

mg/l

0.075

0.0005

nd

nd

nd

0.0006

1,1,1-Trichlorethane

mg/l

0.2

0.0005

nd

nd

nd

nd

Trichloroethylene(TCE)

mg/l

0.005

0.0005

nd

0.0023

nd

nd

Vinyl chloride

mg/l

0.002

0.0003

nd

nd

nd

nd

cis-1,2-Dichloroethylene

mg/l

0.07

0.0005

nd

nd

nd

nd

1,2,-Dichloropropane

mg/l

0.005

0.0005

nd

nd

nd

nd

Ethylbenzene

mg/l

0.7

0.0005

nd

nd

nd

nd

Monochlorobenzene

mg/l

0.1

0.0005

nd

nd

nd

nd

o-Dichlorobenzene

mg/l

0.6

0.0005

nd

nd

nd

nd

Styrene

mg/l

0.1

0.0005

nd

nd

nd

nd

Tetrachloroethylene(PCE)

mg/l

0.005

0.0005

nd

0.0023

nd

nd

Toluene

mg/l

1

0.0005

nd

nd

nd

nd

trans-1,2-Dichloroethylene

mg/l

0.1

0.0005

nd

nd

nd

nd

Xylenes (total)

mg/l

10

0.0005

nd

nd

nd

nd

Dichloromethane

mg/l

0.005

0.0005

nd

0.0009

nd

nd

1,2,4-Trichlorobenzene

mg/l

0.07

0.0005

nd

nd

nd

nd

1,1,2-Trichloroethane

mg/l

0.005

0.0005

nd

nd

nd

nd

Unregulated VOCs

Bromobenzene

mg/l

na6

0.0005

nd

nd

nd

nd

Bromodichloromethane

mg/l

na

0.0005

nd

0.0011

nd

2.75

Bromoform

mg/l

na

0.0005

nd

0.0028

nd

0.0018

Bromomethane

mg/l

na

0.0005

nd

0.0006

nd

nd

Chlorobenzene

mg/l

na

0.0005

nd

nd

nd

nd

Chlorodibromomethane

mg/l

na

0.0005

nd

0.0015

nd

0.0037

Chloroethane

mg/l

na

0.0005

nd

nd

nd

nd

Chloroform

mg/l

na

0.0005

nd

0.0028

nd

0.238

Chloromethane

mg/l

na

0.0005

nd

0.0012

nd

3.75

o-Chlorotoluene

mg/l

na

0.0005

nd

nd

nd

nd

p-Chlorotoluene

mg/l

na

0.0005

nd

nd

nd

nd

Dibromomethane

mg/l

na

0.0005

nd

nd

nd

nd

m-Dichlorobenzene

mg/l

na

0.0005

nd

nd

nd

nd

1,1-Dichloroethane

mg/l

na

0.0005

nd

nd

nd

nd

1,1-Dichloropropene

mg/l

na

0.0005

nd

nd

nd

nd

1,3-Dichloropropane

mg/l

na

0.0005

nd

nd

nd

nd

1,3-Dichloropropene

mg/l

na

0.0005

nd

nd

nd

nd

2,2-Dichloropropane

mg/l

na

0.0005

nd

nd

nd

nd

1,1,1,2-Tetrachloroethane

mg/l

na

0.0005

nd

nd

nd

nd

1,1,2,2-Tetrachloroethane

mg/l

na

0.0005

nd

nd

nd

nd

1,2,3-trichloropropane

mg/l

na

0.0005

nd

nd

nd

nd

Radioactivity

Gross Alpha Activity

pCi/l

15.000

1.500

nd

nd

nd

2.400

Radium 226

pCi/l

3.000

0.200

na

na

nd

0.300

Gross Beta Activity

pCi/l

50.000

1.500

nd

2.800

nd

2.500

1MCL: Maximum Contaminant Level

4MAX: Maximum Annual Running Average

2DL : Detection Level

5nd : not detected

3MIN : Minimum Annual Running Average

6na : not applicable for unregulated contaminants

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