Protection Against Legionella

This web page provides information to comply with permanent regulatory requirements of the New York State Sanitary Code Title: Part 4-Protection Against Legionella. This regulation was passed in July 2016, replacing the emergency regulations passed in August 2015. The information is primarily for:

  • Cooling tower owners, operators, water treatment consultants and inspectors (Subpart 4-1).
  • Operators of all general hospitals and residential health care facilities (Subpart 4-2).

Cooling Tower Owners and Operators

All owners of cooling towers in New York State are required to register, maintain, sample, disinfect and notify local health departments and the public of elevated levels of Legionella.

Hospitals and Residential Health Care Facilities

All covered Article 28 general hospitals and residential health care facilities are required to assess and sample their potable water systems for Legionella, and to institute control measures in the event of an exceedance.