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GARDEN CITY PARK WATER DISTRICT 2006 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, July, Aug. 2005 | ND - 0.1(1) | mg/l | 1.3 | AL = 1.3 | Corrosion of household plumbing; erosion of natural deposits |
| Lead | No | June, July, Aug. 2005 | ND - 1.14(1) | ug/l | 0 | AL = 15 | Corrosion of household plumbing; erosion of natural deposits |
| Iron | No | 01/05/06 | ND - 45 | ug/l | N | MCL = 300 | Naturally occurring |
| Sodium | No | 01/05/06 | 15.2-33.7 | mg/l | n/a | No MCL(2) | Naturally occurring |
| Magnesium | No | 01/10/06 | 8.6 - 14.5 | mg/l | n/a | None | Naturally occurring |
| Chloride | No | 01/25/06 | 31.2 - 68.8 | mg/l | n/a | MCL = 250 | Naturally occurring |
| Calcium | No | 01/10/06 | 15.0 - 23.1 | mg/l | n/a | No MCL | Naturally occurring |
| Nitrate | No | 01/19/06 | 3.3 - 6.5 | mg/l | 10 | MCL = 10 | Runoff from fertilizer and leaching from septic tanks and sewage |
| Sulfate | No | 01/25/06 | 19.0 - 44.2 | mg/l | n/a | MCL = 250 | Naturally occurring |
| Perchlorate | No | 01/10/06 | ND - 1.5 | ug/l | n/a | None(3) | Fertilizer |
| Radionuclides | |||||||
| Gross Alpha | No | 12/11/06 | ND - 6.68 | pCi/L | n/a | MCL = 15 | Naturally occurring |
| Gross Beta | No | 03/22/06 | ND - 3.38 | pCi/L | n/a | MCL = 50 | Naturally occurring |
| Radium 228 | No | 03/22/06 | 0.34 - 3.64 | pCi/L | None | No MCL | Naturally occurring |
| Synthetic Organic Contaminants Including Pesticides and Herbicides | |||||||
| None Detected | -- | -- | ND | -- | -- | -- | -- |
| Volatile Organic Contaminants | |||||||
| Tetrachloroethene | No | 04/10/06 | ND - 2.1 | ug/l | 0 | MCL = 5 | Industrial/Commercial Discharge |
| Trichloroethene | No | 10/11/06 | ND - 0.7 | ug/l | 0 | MCL = 5 | Industrial/Commercial Discharge |
| MTBE | No | 01/17/06 | ND - 1.0 | ug/l | 0 | MCL = 10 | Gasoline Additive |
| Total Trihalomethanes | No | 12/18/06 | ND - 7.0 | ug/l | na | MCL = 80 | Disinfection 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 must 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. | |||||||