At Cal Water’s state-of-the-art laboratory in San Jose, California, it’s the little things that count.

Cal Water’s chemists and microbiologists conduct more than 400,000 separate water quality tests every year, looking for microbiological, organic, and inorganic compounds in the water. For certain tests, they look for quantities measured in parts per trillion; that’s like looking for a few marked pennies in three football stadiums filled to the rim with coins.

Our scientists examine water samples that are carefully shipped to the lab from sampling stations throughout Cal Water’s systems to ensure that your water meets or surpasses strict state and federal water quality standards. Protecting our customers’ health and safety is our highest priority. Cal Water staffs its lab with some of the best scientists in the water industry. The entire laboratory operation is fully certified by the California Environmental Laboratory Accreditation Program one of the toughest certifications to achieve in the country.

You might not have thought much about Cal Water’s water quality laboratory, but the scientists in the lab have thought about your water; every drop of it.