New York American Water – Merrick Operations District

1 New york American Water . Merrick Operations District Typical Water Quality Information for 2017. PWSID Number: NY2902840. Area Served: Southeastern Nassau County, NY . Including the following communitues: Bellmore, East Massapequa, Levittown*, Massapequa*, Merrick , North Bellmore, North Merrick , North Seaford, North Wantagh, Seaford, and Wantagh. (* = Community partially served by NYAW). Where Does My Water Come From? Groundwater is the source of all of the drinking Water supplied by New york American Water (NYAW). It is drawn up from the ground from approximately 16 wells located in the aquifer system beneath the land surface, and spread-out throughout our service territory. The aquifers are Water -bearing geologic deposits of sand and clay that absorb and store about 45 percent of the rain and snow that fall on Long Island.

2 The aquifer utilized by NYAW Merrick Operations is the Magothy Aquifer . Average amount of Water supplied to customers on a daily basis 15 million gallons per day (average). [Approximately 28 million gallons per day in Summer (peak) season]. [Approximately 10 million gallons per day in Winter (off-peak) season]. Typical Water Quality 1. Parameter Average or Comments Range 2017 Avg = pH is a measure of the acid / base pH. units properties of Water . Total Hardness mg/L Naturally occurring (as CaCO3). Naturally occurring parameter. Total Hardness grains Water can be classified as having a (as CaCO3) per gallon (gpg). Soft hardness level. Naturally occurring and Water additive, MCL = mg/L No Fluoride is Fluoride 0 mg/L. naturally found in our Water sources or added by New york American Water .

3 No MCL Informational only. Water containing more than 20 mg/L of Sodium should not be used for drinking by persons on severely restricted . Sodium mg/L. Sodium diets; while Water containing more than 270 mg/L of Sodium should not be used for drinking by persons on moderately restricted Sodium diets. Secondary Standard Limit = mg/L - Iron is a naturally occurring parameter and is not a health concern (aesthetic quality only that can cause discolored Iron mg/L Water conditions). Higher levels of iron (range). (up to mg/L) may be allowed by New york State when justified using treatment by the Water supplier, as is the case with New york American Water . Manganese mg/L Naturally occurring Type of disinfection - - Chlorine (Sodium Hypochlorite).

4 Disinfectant chlorine residual level leaving mg/L Water additive used to control microbes. the treatment plant (range). Disinfectant chlorine residual level in the 2017 average = Max Residual Disinfectant Level distribution system mg/L Running Annual Avg (MCL) = mg/L. (yearly average). Typical Water Quality 2. Parameter Average or Comments Range Action Level = ug/L. Lead Sources include corrosion of household ug/L. [90th percentile result] plumbing and erosion of natural deposits. Action Level = mg/L. Copper Sources include corrosion of household mg/L. [90th percentile result] plumbing and erosion of natural deposits. Nitrate ND mg/L MCL = 10 mg/L. Sources include runoff from fertilizer use; leaching of septic tanks and sewage; erosion of natural deposits.

5 Arsenic ND MCL = 10 ug/L. Chromium-6 ND ug/L Chromium-6 is not currently regulated as an individual contaminant. It is being monitored as part of the USEPA. Unregulated Contaminant Monitoring Rule (UCMR3) special sampling program. Water -Quality/Chromium-6. Definitions: mg/L milligrams per liter; one milligram per liter is equal to one part per million (ppm), which is approximately the same as 1 second in days ug/L micrograms per liter; one microgram per liter is equal to one part per billion (ppb), which is approximately the same as 1 second in years N/A Not Applicable ND Not Detected at the method detection level. MCL Maximum Contaminant Level The highest level of a contaminant allowed in drinking Water under Federal and / or State regulations.

6 Typical Water Quality 3. For a complete report of your Water quality, please refer to the most recent Annual Water Quality Report , also known as the Consumer Confidence Report , located on the American Water web site at For more information, please contact: Our Customer Service Center at 1-877-426-6999. (M-F; 7am-7pm). Or Our local Water Quality Manager at 516-632-2215. (regular business hours). Rev. 2/27/18. MPN. Typical Water Quality 4. Typical Water Quality 5.