As Summer continues, the Department of Health and Mental Hygiene is reminding teams to implement new and updated cooling tower requirements.
More Frequent Sampling Required
The DOHMH reminded teams that as of May 8th, 2026, owners with cooling towers must collect Legionella samples at least every month while the device is in operation, with no more than 31 days between samples. Qualified persons can report the date of the sample in the NYC Cooling Tower Registration Portal within 5 days of collection. Owners can add Qualified Persons to their portal at the same link, under System Page > Manage Qualified Person.
Owners must also notify DOHMH of the tower’s most recent startup date, shutdown date, and operation period.
Don’t Forget Summertime Hyperhalogenation
Summertime hyperhalogenation requires cooling towers to receive an additional application of high-level biocide once a year, between July 1st and August 31st. Owners must then submit this form within 30 days after completing the disinfection.
Teams must collect a Legionella sample within the period of 3 to 31 days after the hyperhalogenation.
In Your Account
If you’re not sure when the last sampling was reported, just check your SiteCompli account!
You can review the latest sampling dates for all your cooling towers in your SiteCompli or InCheck account on this page. Filter by property or sort by date to see the latest records for each of your towers. You can also upload sampling documentation for each record, so they’re available when you need them.
Questions? We’re here to help! Let us know if you need more details on any of the above changes, or where you can find Cooling Tower data in your account.
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