Understanding NYC Cooling Tower Registration and LL 77 Requirements

Cooling Tower Registration & Maintenance is Required By Local Law 77

Stay Compliant. Avoid Fines.

In accordance with NYC cooling tower Local Law 77 (LL77) and Chapter 8 (Cooling Towers) of Title 24 of the Rules of the City of New York, building owners and property managers are required to register cooling towers, evaporative condensers, and fluid coolers with the City and to annually certify with the Department of Health & Mental Hygiene (DOHMH) that they have been tested, cleaned and disinfected.

Donnelly Mechanical and our strategic partners NYC Cooling Tower Inspections and Services know the law and offer the services you need.

From cooling tower maintenance and repair to the development of a cooling tower maintenance plan and scheduling of mandated inspections, you will get the services you need to avoid fines, stay compliant, and keep your cooling tower operational.

Cooling Tower

Summary of What is Required:

  • Register existing cooling towers, evaporation condensers & fluid coolers as at September 16, 2016 with New York State and DOHMH as at September 17, 2015.
  • Register new cooling towers, evaporation condensers & fluid coolers before use.
  • Hire a Certified Water Technologist Experienced with ASHRAE Standard 188P & CTI Guidelines WTB-148.
  • Develop and follow maintenance program and plan (MPP) in line with American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE 188-2015) Standard.
    • Inspection – Every 90 days & Before Seasonal Start-up by Qualified Professional
    • Testing – Every 90 days by Qualified Professional
    • Cleaning – Twice Annually by Qualified Professional
    • Disinfection – Requires the use of biocides applied by a commercial pesticide applicator with Category 7G certification issued by the NYS Department of Environmental Conservation (NYS DEC).
  • Annual Certification

Stay Compliant. Avoid Fines.

Talk with us about how we can keep you compliant.
Call Donnelly Mechanical at (718) 886-1500

New York City Commissioner’s Order

On August 6 2015, the New York City Health Commissioner issued an order to all owners of buildings with cooling towers in response to the Legionnaires Disease Outbreak in the South Bronx. Building owners are now required to register cooling towers, evaporative condensers, and fluid containers with New York State and New York City. See top of page for link to New York City Cooling Tower Registration Portal.

New York City issued this order because of an outbreak of Legionnaires’ Disease in the South Bronx. Several cooling towers in the affected neighborhoods tested positive for legionella. The outbreak has not affected the City’s drinking or bathing water; it is safe for building residents to drink and bathe with tap water. It is also safe to use home air conditioning units and to be in air conditioned areas.

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– JWT, 466 Lexington, Manhattan
John Fallon

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