Suffolk County Water Authority is the largest municipal groundwater supplier in the nation. Every year, thousands of water samples are screened for contaminants to be sure the water supplies are safe for humans.

Credit: Newsday / Audrey C. Tiernan

Jeanne Lotierzo, supervisor of receiving at the Suffolk County Water Authority, prepares test sets to be sent out for water sample collection. Suffolk County Water Authority is the largest municipal groundwater supplier in the nation. Every year, thousands of water samples are screened for contaminants to be sure the water supplies are safe for humans. (Sept. 15, 2013)

Credit: Newsday / Audrey C. Tiernan

Kevin Scanlon, a chemist II with the Suffolk County Water Authority, prepares a quality control standard for testing drinking water. Suffolk County Water Authority is the largest municipal groundwater supplier in the nation. Every year, thousands of water samples are screened for contaminants to be sure the water supplies are safe for humans. (Sept. 15, 2013)

Credit: Newsday / Audrey C. Tiernan

Jeanne Lotierzo, supervisor of receiving at the Suffolk County Water Authority, prepares test sets to be sent out for water sample collection. (Sept. 15, 2013)

Credit: Newsday / Audrey C. Tiernan

Kevin Scanlon, a chemist II with the Suffolk County Water Authority, prepares a quality control standard for testing drinking water. (Sept. 15, 2015)

Credit: Newsday / Audrey C. Tiernan

Karen Randazzo, director of Water Quality & Laboratory Services at the Suffolk County Water Authority, at one of the labs. (Sept. 15, 2013)

Credit: Newsday / Audrey C. Tiernan

Mark Kessel, a technician at the Suffolk County Water Authority, discusses test results with Karen Randazzo, director of Water Quality & Laboratory Services. (Sept. 15, 2013)

Credit: Newsday / Audrey C. Tiernan

Amanda Comando, an assistant supervising chemist at the Suffolk County Water Authority, works in a lab extracting pharmaceuticals from drinking water. (Sept. 15, 2013)

Credit: Newsday / Audrey C. Tiernan

Kelly Majuk, a senior lab technician at the Suffolk County Water Authority, tests the alkalinity of drinking water by alkalinity titration. (Sept. 15, 2013)

Credit: Newsday / Audrey C. Tiernan

Kelly Majuk, a senior lab technician at the Suffolk County Water Authority, tests the alkalinity of drinking water by alkalinity titration. (Sept. 15, 2013)

Credit: Newsday / Audrey C. Tiernan

Collected drinking water samples will be checked into the lab by their bar codes at the Suffolk County Water Authority on Sept. 15, 2013. They will be tested against standard samples and screened for contaminants.

Credit: Newsday / Audrey C. Tiernan

Kelly Majuk, a senior lab technician at the Suffolk County Water Authority, tests the alkalinity of drinking water by alkalinity titration. (Sept. 15, 2013)

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