GARDEN CITY PARK WATER DISTRICT

2010 WATER QUALITY REPORT

TABLE OF DETECTED PARAMETERS

  
 
 

 

 

Contaminants

 

Violation

(Yes/No)

 

Date of

Sample

Level Detected

(Maximum) (Range)

Unit

Measure-

ment

 

 

MCLG

 

Regulatory Limit

(MCL or AL)

 

 

Likely Source of  Contaminant

 

Inorganic Contaminants

Copper

No

June - Sept. 2008

ND - 0.09(1)

mg/l

1.3

AL =1.3

Corrosion of household plumbing; Erosion of natural deposits

Lead

No

June - Sept. 2008

ND - 1.36(1)

ug/l

0

AL =15

Corrosion of household plumbing; Erosion of natural deposits

Iron

No

01/11/2010

ND - 30

ug/l

N

MCL = 300

Naturally occurring
Zinc

No

01/07/2010

ND - 0.03

mg/l

n/a

MCL = 5.0

Naturally occurring

Sodium

No

01/11/2010

15.8 - 34.1

mg/l

n/a

No MCL(2)

Naturally occurring

Magnesium

No

01/11/2010

7.5 - 15.1

mg/l

n/a

None

Naturally occurring

Chloride

No

01/11/2010

38.9 - 66

mg/l

n/a

MCL=250

Naturally occurring

Calcium

No

01/11/2010

16.0 - 25.1

mg/l

n/a

No MCL

Naturally occurring

Nitrate

No

 01/11/2010

3.8 - 7.1

mg/l

10

MCL=10

Runoff from fertilizer and leaching from septic tanks and sewage

Sulfate

No

 01/12/2010

29.4 - 41.4

mg/l

n/a

MCL=250

Naturally occurring
Perchlorate

No

01/07/2010

ND - 1.3

ug/l

n/a

None (3)

Fertilizer
   Radionuclides
Gross Alpha No

12/22/2010

0.7 - 2.1 pci/L

-

 MCL = 15 pci/L Naturally occurring
Radium 228 No

12/22/2010

1.2 - 1.8 pci/L - No MCL Naturally occurring

Synthetic Organic Contaminants Including Pesticides and Herbicides

None Detected

--

--

ND

--

--

--

--

Volatile Organic Contaminants

Tetrachloroethene

No

04/08/2010

ND - 1.3

ug/l

0

MCL=5

Industrial/Commercial Discharge

MTBE

No

07/06/2010

ND - 1.7

ug/l

0

MCL = 10

Gasoline Additive

Total Trihalomethanes

No

01/04/2010

ND - 1.7

ug/l

n/a

MCL = 80

Disinfections By-Product

DEFINITIONS

Maximum Contaminant Level MCL)- The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGS as feasible.

Maximum Contaminant Level Goal (MCLG)- The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.

Action Level (AL) – The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system much follow.

Milligrams per liter (mg/l) – Corresponds to one part of liquid in one million parts of liquid (parts per million – ppm).

Micrograms per liter (ug/l) – Corresponds to one part of liquid in one billion parts of liquid (parts per billion – ppb).

PCI/L - Pico Curies per Liter is a measure of radioactivity in water.

Non-Detects(ND) – Laboratory analysis indicates that the constituent is not present.

(1) - During 2008 we collected and analyzed 30 samples for lead and copper. The 90% percentile level is presented in the table. The action levels for both lead and copper were not exceeded at any site tested.

(2) - No MCL has been established for sodium. However, 20 mg/l is a recommended guideline for people on high restricted sodium diets and 270 mg/l for those on moderate sodium diets.

(3) - Perchlorate is not regulated by the USEPA. However, New York State has set an action level of 18.0 ppb.