The Protection Against Legionella_[1] regulation requires that all Legionella culture analyses be performed by a laboratory approved by the New York State Environmental Laboratory Approval Program (ELAP) to perform such analyses.  

Certification for Legionella culture analysis is offered in the category of Non-Potable Water using International Standard Method 11731 Water quality-detection and enumeration of Legionella (ISO 11731). It is also offered for certification in Potable Water using the same method.

Application materials_[2] for these categories are provided.

Applicants are required to submit proficiency testing (PT) results for Non-Potable samples only from any TNI and ISO/IEC 17043:2010 accredited providers_[3].  Applicants must demonstrate passing scores in at least two (2) of three (3) consecutive proficiency tests performed at least fifteen (15) days apart. 

An on-site assessment must be performed prior to certification being granted.

Questions on certification for Legionella culture analysis can be sent to elap@health.ny.gov_[4].

Legionella Frequently Asked Questions _[5]