GARDEN CITY PARK WATER DISTRICT

2013 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

July - August 2011

ND - 0.18

0.08(1)

mg/L

1.3

AL = 1.3

Corrosion of household plumbing systems; Erosion of natural deposits

Lead

No

July - August 2011

ND - 3.46

3.27(1)

ug/L

1.3

AL = 15

Corrosion of household plumbing systems; Erosion of natural deposits

Barium

No

01/28/13

0.01 -0.03

mg/L

n/a

MCL = 20

Naturally occurring

Sodium

No

01/14/13

14.2 -38.9

mg/L

n/a

No MCL(2)

Naturally occurring
Iron

No

03/19/13

ND - 80

 mg/L

n/a

 MCL = 300

Naturally occurring

Fluoride

No

01/14/13

ND - 0.14

 mg/L

n/a

 MCL = 2.2

Naturally occurring

Magnesium

No

01/14/13

7.1 - 16.5

mg/L

n/a

No MCL

Naturally occurring

Chloride

No

01/14/13

22.7 - 74.7

mg/L

n/a

MCL = 250

Naturally occurring

Calcium

No

01/14/13

13.3- 27.0

mg/L

n/a

No MCL

Naturally occurring

Nitrate

No

05/01/13

ND - 7.2

mg/L

10

MCL = 10

Runoff from fertilizer and leaching from septic tanks and sewage

Sulfate

No

01/07/13

15.6 - 38.5

mg/L

n/a

MCL = 250

Naturally occurring

Selenium

No

01/14/13

ND - 2.7

ug/L

n/a

MCL = 50

Naturally occurring

Zinc

No

04/15/13

ND - 0.1

mg/L

n/a

MCL = 5

Naturally occurring

Thallium

No

04/15/13

ND - 0.9

ug/L

n/a

MCL = 2

Naturally occurring

Perchlorate

No

01/14/13

ND - 1.1

ug/L

n/a

AL = 18(3)

Fertilizer

Volatile Organic Contaminants

Tetrachloroethene

No

10/03/13

ND - 1.2

ug/L

0

MCL =  5 

Industrial/Commercial Discharge  

MTBE

No

 3/19/13

ND - 0.8

ug/L

0

MCL = 10

Gasoline Additive

Total Trihalomethanes

No

10/21/13

ND - 8.2

ug/L

n/a

MCL = 80

Disinfection By-Products

Synthetic Organic Contaminants Including Pesticides and Herbicides

None Detected

--

--

ND

--

--

--

--

Radionuclides
Gross Alpha No

12/17/13

0.94 - 3.58 pCi/L

n/a

 MCL = 15 Naturally occurring
Radium 226 No

12/17/13

0.09 - 1.84 pCi/L n/a  MCL = 5(4) Naturally occurring
Radium 228 No

12/17/13

0.39 - 1.73 pCi/L n/a   MCL = 5(4) Naturally occurring

Unregulated Contaminant Monitoring Regulation (UCMR) Contaminants(5)
1.4 Dioxane No

10/17/13

0.1 - 3.0 ug/L

n/a

 No MCL Naturally occurring
Chromium No

10/16/13

0.3 - 1.0 ug/L 100  MCL = 100 Naturally deposits
Hexavalent Chromium No

10/16/13

ND - 1.0 ug/L n/a No MCL Naturally deposits
Strontium No

10/24/13

74.0 - 170.0 ug/L n/a No MCL Naturally occurring
Chlorate No

10/17/13

ND - 170 ug/L n/a  No MCL Naturally occurring

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).

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

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

(1) - During 2011 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 an unregulated contaminant. However, the State Department of Health has established an action level of 18ug/L.

(4) - MCL for radium 226 and 228 is a combined total radium = 5 pCi/L.

(5) - UCMR3 - Unregulated Contaminant Monitoring Rule 3 is a Federal water quality sampling program where water suppliers sample and test their source water for one year. Results will be used by EPA to determine if the contaminants need to be regulated in the future.