Page 1 of 2

Update:

5/1/07

PENNICHUCK WATER WORKS

WATER QUALITY REPORT

AVERY ESTATES- LONDONDERRY, NH

EPA # 1392250

VOLATILE ORGANIC CONTAMINANTS (b) (Units µg/L)

Analyte

Result

MCL

Date

Analyte

Result

MCL

Date

1,1,1,2-Tetrachloroethane

< 0.5

NR

1/27/05

Diisopropyl Ether (DIPE)

< 0.5

NR

1/27/05

1,1,1-Trichloroethane

< 0.5

200

1/27/05

Ethyl Tert-Butyl Ether (ETBE)

< 0.5

NR

1/27/05

1,1,2,2-Tetrachloroethane

< 0.5

NR

1/27/05

Ethylbenzene

< 0.5

700

1/27/05

1,1,2-Trichloroethane

< 0.5

5

1/27/05

Hexachlorobutadiene

< 0.5

NR

1/27/05

1,1-Dichloroethane

< 0.5

NR

1/27/05

Isopropylbenzene

< 0.5

NR

1/27/05

1,1-Dichloroethane

< 0.5

7

1/27/05

m/p - Xylenes

< 0.5

NR

1/27/05

1,1-Dichloropropylene

< 0.5

NR

1/27/05

Methyl ethyl ketone (MEK) 2-Butanone

< 0.5

NR

1/27/05

1,2,3-Trichlorobenzene

< 0.5

NR

1/27/05

Methylene chloride

< 0.5

5

1/27/05

1,2,3-Trichloropropane

< 0.5

NR

1/27/05

Methyl-t-butyl-ether (MtBE)

< 0.5

13

1/27/05

1,2,4-Trichlorobenzene

< 0.5

70

1/27/05

Napthalene

< 0.5

NR

1/27/05

1,2,4-Trimethylbenzene

<0.5

NR

1/27/05

n-Butylbenzene

< 0.5

NR

1/27/05

1,2-Dibromo - 3- chloropropane

< 0.5

0.2

1/27/05

Nitrobensene

< 0.5

NR

1/27/05

1,2-Dibromoethane

< 0.5

NR

1/27/05

n-Proplybenzene

< 0.5

NR

1/27/05

1,2-Dichlorobenzene

< 0.5

600

1/27/05

o-Chlorotoluene

< 0.5

NR

1/27/05

1,2-Dichloroethane

< 0.5

5

1/27/05

o-Xylene

< 0.5

NR

1/27/05

1,2-Dichloropropane

< 0.5

5

1/27/05

p-Chlorotoluene

< 0.5

NR

1/27/05

1,3,5-Trimethylbenzene

< 0.5

NR

1/27/05

sec Butylbenzene

< 0.5

NR

1/27/05

1,3-Dichlorobenzene

< 0.5

NR

1/27/05

Styrene

< 0.5

100

1/27/05

1,3-Dichloropropane

< 0.5

NR

1/27/05

Tert-Amyl Methyl Ether (TAME)

< 0.5

NR

1/27/05

1,4-Dichlorobenzene

< 0.5

75

1/27/05

Tert-Butyl Alcohol (TBA)

< 0.5

NR

1/27/05

2,2-Dichloropropane

< 0.5

NR

1/27/05

Tert-Butylbenzene

< 0.5

NR

1/27/05

2-Hexanone

< 0.5

NR

1/27/05

Tetrachloroethylene

< 0.5

5

1/27/05

4 Methyl-2-Pentanone (MIBK)

< 0.5

NR

1/27/05

Tetrachloromethane

< 0.5

NR

1/27/05

4-Isopropyltoluene

< 0.5

NR

1/27/05

Tetrahydrofuran

< 0.5

NR

1/27/05

Acetone

< 0.5

NR

1/27/05

Toluene

< 0.5

1000

1/27/05

Benzene

< 0.5

5

1/27/05

Total Xylenes

< 0.5

10,000

1/27/05

Bromobenzene

< 0.5

NR

1/27/05

Trans-1, 2-Dichloroethylene

< 0.5

100

1/27/05

Bromochloromethane

< 0.5

NR

1/27/05

Trans-1, 3-Dichloropropylene

< 0.5

NR

1/27/05

Bromomethane

< 0.5

NR

1/27/05

Trichloroethylene

< 0.5

5

1/27/05

Carbon Disulfide

< 0.5

NR

1/27/05

Trichlorofluromethane

< 0.5

NR

1/27/05

Chlorobenzene

< 0.5

100

1/27/05

Vinyl chloride

< 0.5

2

1/27/05

Chloroethane

< 0.5

NR

1/27/05

Chloromethane

< 0.5

NR

1/27/05

TRIHALOMETHANES

cis-1, 2-Dichloroethylene

< 0.5

70

1/27/05

Bromodichloromethane

3.2

80

1/27/05

cis-1, 3-Dichloropropylene

< 0.5

NR

1/27/05

Bromoform

0.6

80

1/27/05

Dibromomethane

< 0.5

NR

1/27/05

Dibromochloromethane

2.9

80

1/27/05

Dichlorodifluoromethane

< 0.5

NR

1/27/05

Chloroform

2.2

80

1/27/05

Diethyl ether

< 0.5

NR

1/27/05

Total Trihalomethanes

8.9

80

1/27/05

SYNTHETIC ORGANIC CONTAMINANTS (b) (Units µg/L)

2,4,5-TP (Silvex)

nd

50

1/27/05

Dinoseb

nd

7

1/27/05

2,4-D

nd

70

1/27/05

Endrin

nd

2

1/27/05

3-Hydorxycarbofuran

nd

NR

1/27/05

Ethylene dibromide (EDB)

nd

0.05

1/27/05

Alachlor

nd

2

1/27/05

Fluorene

nd

NR

1/27/05

Aldicarb

nd

NR

1/27/05

Glyphosate

nd

700

1/27/05

Aldicarb Sulfone

nd

NR

1/27/05

Heptachlor

nd

0.4

1/27/05

Aldicarb Sulfoxide

nd

NR

1/27/05

Heptachlor Epoxide

nd

0.2

1/27/05

Aldrin

nd

NR

1/27/05

Hexachlorobenzene

nd

1

1/27/05

Atrazine

nd

3

1/27/05

Hexachlorocyclopentadiene

nd

50

1/27/05

Benzo (A) pyrene

nd

NR

1/27/05

Lindane

nd

0.2

1/27/05

Butachlor

nd

NR

1/27/05

Metholachlor

nd

NR

1/27/05

Carbaryl

nd

NR

1/27/05

Methomyl

nd

NR

1/27/05

Carbofuran

nd

40

1/27/05

Methoxychlor

nd

40

1/27/05

Chlordane

nd

2

1/27/05

Metribuzin

nd

NR

1/27/05

Di (2-ethylhexyl) adipate

nd

NR

1/27/05

Oxamyl (Vydate)

nd

200

1/27/05

Di (2-Ethylhexyl) phthalate

nd

6

1/27/05

Pentachlorophenol

nd

1

1/27/05

Dibromochloropropane (DBCP)

nd

NR

1/27/05

Picloram

nd

500

1/27/05

Dicamba

nd

NR

1/27/05

Propachlor

nd

NR

1/27/05

Dieldrin

nd

NR

1/27/05

Simazine

nd

4

1/27/05

Toxaphene

nd

3

1/27/05

Page 2 of 2

PENNICHUCK WATER WORKS

WATER QUALITY REPORT

AVERY ESTATES- LONDONDERRY, NH

EPA # 1392250

INORGANIC CONTAMINANTS (b)

SECONDARY CONTAMINANTS (b) - AESTHETIC

Analyte

Results

MCL

Date

Analyte

Results

SMCL

Date

Antimony (µg/L)

< 2

6

2/28/07

Chloride (mg/L)

44

250

2/28/07

Arsenic (µg/L)

<2

10

5/1/07

Copper (mg/L)

< 0.01

AL=1.3

2/28/07

Barium (mg/L)

<0.01

2

2/28/07

Fluoride (mg/L)

0.26

2

2/28/07

Beryllium (µg/L)

< 2

4

2/28/07

Iron (µg/L)

33

300

2/28/07

Cadmium (µg/L)

< 2

5

2/28/07

Manganese (µg/L)

<10

50

2/28/07

Chromium (µg/L)

< 10

100

2/28/07

pH (Units)

7.87

6.5 – 8.5

2/28/07

Cyanide (µg/L)

<20

200

2/28/07

Silver (µg/L)

< 4

100

2/28/07

Fluoride (mg/L)

0.26

4

2/28/07

Sodium (mg/L)

34.6

100-250

2/28/07

Lead (µg/L)

< 5

AL=15

2/28/07

Sulfate (mg/L)

26.3

250

2/28/07

Mercury (µg/L)

<0.1

2

2/28/07

Zinc (mg/L)

0.206

5

2/28/07

Nickel (µg/L)

< 10

100

2/28/07

Nitrate-N (mg/L)

0.22

10

2/28/07

Nitrite-N (mg/L)

< 0.05

1

2/28/07

RADIOLOGICAL CONTAMINANTS (b)

Selenium (µg/L)

< 5

50

2/28/07

Analyte (Units)

Results

MCL

Date

Thallium (µg/L)

< 1

2

2/28/07

Adjusted Gross Alpha (pCi/L)

<3.0

15

12/7/06

Radon Gas (pCi/L)

<200

None

4/2/07

FIRST DRAW LEAD AND COPPER (a)

Radium-226 (pCi/L)

0.2

5

12/7/06

Analyte

Results

AL

Date

Radium-228 (pCi/L)

<0.5

5

12/7/06

Lead (µg/L) 90th percentile sample

nd

15

2006

Uranium (µg/L)

<0.9

30

12/7/06

Copper (mg/L) 90th percentile sample

0.176

1.3

2006

Microbiological Contaminants (a)

Results

MCL

Date

Total Coliform

Absent

< 1/month

Monthly

E. coli

Absent

Absent

Monthly

Chlorine Residual (mg/L)

0.2-0.9

<4.0

Weekly

UNREGULATED CONTAMINANTS (b)

Analyte (Units)

Results

Date

Analyte (Units)

Results

Date

Alkalinity as CaCO3 (mg/L)

95.5

2/28/07

Specific Conductance (umhos/cm2)

399

2/28/07

Calcium (mg/L)

33

2/28/07

Total Hardness as CaCO3 (mg/L)

98.5

2/28/07

Hydrogen Sulfide (mg/L)

< 0.02

2/28/07

Magnesium (mg/L)

3.9

2/28/07

Orthophosphate (mg/L)  average

1.74

Monthly

KEY TO ABBREVIATIONS