Resources: NYC Cooling Tower Compliance & Water Treatment

NYC Cooling Tower Compliance (LL77)

New York City’s Local Law 77 (2015) created comprehensive cooling-tower requirements after the 2015 Legionnaires’ outbreaks. Owners must register towers, implement a written maintenance plan, perform routine monitoring and Legionella sampling, keep detailed records, and submit annual certifications. See the full law and DOHMH guidance below. :contentReference[oaicite:0]{index=0}

What LL77 inspections typically include

• Verification of tower registration and signage
• Maintenance Program & Plan (MPP) / procedures on site
• Water-quality testing logs, Legionella sampling records, and corrective actions
• Cleaning & disinfection documentation (startup, seasonal, corrective)
• Annual certification and 90-day inspection cycle evidence (per current DOHMH rules). :contentReference[oaicite:1]{index=1}

Good Water-Treatment Practices

Quality assurance and consistent performance come from disciplined routines:

• Regular field chemistry and lab testing (including Legionella per DOHMH rules)
• Well-documented service visits, cleanings, and chemical additions
• Automated monitoring where appropriate, with trend analysis and alerts
• Annual system evaluations and passivation where applicable
• Compliance checks and timely corrective actions
• Operator training, SOPs, and maintained electronic logbooks

DOHMH’s official technical guidance is a great reference for programs, sampling, and documentation. :contentReference[oaicite:3]{index=3}

Official Guidance & Links

• Local Law 77 of 2015 (Cooling Towers) — full text.
• DOHMH: Water Treatment Guidance for Cooling Tower Systems (PDF). :contentReference[oaicite:5]{index=5}
• Cooling Towers Portal (registration & annual certification). :contentReference[oaicite:6]{index=6}

Related NYC Local Laws

• Local Law 87 (Energy Audits & Retro-Commissioning) — energy systems compliance & reporting. :contentReference[oaicite:7]{index=7}
• Local Law 86 (NYC Green Building) — sustainability requirements for certain projects. :contentReference[oaicite:8]{index=8}