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1,4-Dioxane Testing of Drinking Water

Wednesday, June 14, 2017

Section 1112 of the Public Health Law (emergent contaminant monitoring), enacted by Part M of Chapter 57 of the laws of 2017, requires drinking water to be tested for the emerging contaminant, 1,4-Dioxane, by a laboratory certified by the Department’s Environmental Laboratory Approval Program (ELAP) pursuant to section 502 of Public Health Law.

Beginning June 14, 2017, application materials will be available for laboratories to apply for ELAP certification for drinking water 1,4-Dioxane.  Any laboratories currently performing 1,4-Dioxane analysis on drinking water samples originating from New York State will need to submit an application, including supporting documentation (standard operating procedure and demonstration of capability), by Friday, July 14, 2017.

Certification for 1,4-Dioxane will be offered in the category of drinking water using Environmental Protection Agency (EPA) method 522 – Determination of 1,4-Dioxane in Drinking Water by Solid Phase Extraction and Gas Chromatography/Mass Spectrometry with Selected Ion Monitoring (EPA 522). The laboratory must meet a detection limit of 0.02 µg/L.

Please note that applicants will not be required to participate in proficiency testing (PT) studies. In lieu of a PT requirement, the laboratory must submit an initial demonstration of capability. This involves preparing at least 4 laboratory control samples spiked 1-4 times the limit of quantitation. In addition, your laboratory may be required to have an on-site assessment performed prior to full certification being granted.

Questions on certification for Drinking Water 1,4-Dioxane analysis can be sent to