GARDEN CITY PARK WATER DISTRICT
2016 WATER QUALITY REPORT
TABLE OF DETECTED PARAMETERS
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 2014 we collected and analyzed 30 samples for lead and copper. The action levels for both lead and copper were not exceeded at any site tested. The values reported for lead and copper represent the 90th percentile. A percentile is a value on a scale of 100 that indicates the percent of a distribution that is equal to or below it. The 90% percentile level equal to or greater than 90% of the lead and copper values detected at your water system. In our sampling program, the 90th percentile value is the 4th highest result.
(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 18 ug/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.