Garden City Park Water District: Annual Water Quality Report

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, July, Aug. 2005	ND - 0.1⁽¹⁾	mg/l	1.3	AL =1.3	Corrosion of galvanized pipes; Erosion of natural deposits
Lead	No	June, July, Aug. 2005	ND - 1.14⁽¹⁾	ug/l	0	AL =15	Corrosion of household plumbing systems; Erosion of natural deposits
Iron	No	9/12/2007	ND	ug/l	N	MCL = 300	Naturally occurring
Sodium	No	12/5/2007	16.4 - 32.4	mg/l	n/a	No MCL(2)	Naturally occurring
Magnesium	No	1/3/2007	8.5 - 15.5	mg/l	n/a	None	Naturally occurring
Chloride	No	12/5/2007	29.2 - 79.8	mg/l	n/a	MCL=250	Naturally occurring
Calcium	No	1/3/2007	15.8 - 24.4	mg/l	n/a	No MCL	Naturally occurring
Nitrate	No	12/3/2007	3.4 - 5.3	mg/l	10	MCL=10	Runoff from fertilizer and leaching from septic tanks and sewage
Sulfate	No	1/9/2007	5.9 - 39.8	mg/l	n/a	MCL=250	Naturally occurring
Perchlorate	No	5/17/2006	ND - 1.4	ug/l	n/a	None(3)	Fertilizer
Radionuclides
Gross Alpha	No	1/24/2007	ND - 3.2	pCi/L	n/a	MCL = 15	Naturally occurring
Radium 228	No	4/5/2007	ND-2.2	pCi/L	None	No MCL	Naturally occurring
Synthetic Organic Contaminants Including Pesticides and Herbicides
None Detected	--	--	ND	--	--	--	--
Volatile Organic Contaminants
Tetrachloroethene	No	10/6/2007	ND - 4.2	ug/l	0	MCL=5	Industrial/Commercial Discharge
Trichloroethene	No	8/7/2007	ND - 02.6	ug/l	0	MCL=5	Industrial/Commercial Discharge
MTBE	No	5/1/2007	ND - 1.2	ug/l	0	MCL = 10	Gasoline Additive
Total Trihalomethanes	No	1/8/2007	ND - 2.5	ug/l	n/a	MCL = 80	Disinfection By-Product

Maximum Contaminant Level MCL)- The highest level of a contaminant that is allowed in drining 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 2005 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.