New Jersey: a model statute
Leading the way with water safety legislation
In September 2024 New Jersey enacted the broadest Legionella prevention law in the United States. It is the reason this foundation points other states toward New Jersey rather than New York.
Its first compliance deadline falls in September 2026, with full implementation required by December 2026.
What makes it different
Most state requirements target one category. New York regulates cooling towers. Michigan regulates health facilities. Virginia regulates schools.
New Jersey regulates by risk rather than by building category, which is why it reaches so much further.
What it covers
- Healthcare facilities — hospitals and nursing homes, across all water systems
- Correctional facilities
- Buildings with aerosol-generating equipment — cooling towers, evaporative condensers, whirlpool spas, swimming pools, decorative fountains, misters, humidifiers
- Residential buildings over 10 storeys with centralised hot water systems
- Hotels and motels with 25 or more transient units
- Any building with a prior Legionnaires’ disease outbreak
(Residential properties with four or fewer dwelling units are excluded.)
Coming into scope later makes no difference. A building that falls within these categories after the compliance dates — a cooling tower installed next year, a change of use, a conversion that takes a residential block past ten storeys — is expected to meet the same standards. The deadlines are not a cut-off after which new buildings are exempt.
What it requires
A written water management programme aligned with ASHRAE Standard 188 and New Jersey Department of Health guidance.
Testing for Legionella pneumophila — the species responsible for most cases — with sampling obligations that vary by building type.
Public notice on the premises, posted where occupants can see it, confirming a programme has been implemented. This is the provision most often overlooked and one of the most important: it turns compliance into something an occupant can observe.
Record-keeping for at least three years, available for inspection.
Reporting of positive results under procedures set by the Department of Health.
State-level obligations too. The Department of Health must publish guidance for developing programmes and must report annually to the Governor on Legionnaires’ disease in the state. Health officials must follow defined procedures when investigating each reported case.
Enforcement
Civil penalties of up to $2,000 for a first violation and up to $5,000 for subsequent violations, rising to $10,000 for any violation causing serious injury or death.
Modest figures. But the requirement carries a consequence, which distinguishes it from guidance.
What a state adapting it would need to consider
Scope thresholds. The 10-storey and 25-unit lines are judgment calls, and another state might reasonably draw them elsewhere.
Departmental capacity. The law places real obligations on the state health department — guidance, investigation procedures, annual reporting. A state adopting it needs to fund that side too.
Lead time. New Jersey allowed two years between enactment and the first deadline. That is not generous for a building portfolio starting from nothing.
Disclosure. New Jersey requires notice that a programme exists. It does not require publication of test results. A state going further could.
The statute
The full text is published by the New Jersey Legislature and is free to read. It is the enacted chapter law rather than one of the earlier bill drafts, which matters — S2188 was amended several times on its way through, and older versions circulate.
It is not a short document, and like most statutes it reads as amendments to other statutes rather than as a self-contained set of rules. Three things are worth knowing before you open it. The building categories that fall within scope are defined separately from the requirements that apply to them, so you will need both. Residential properties with four or fewer dwelling units are excluded. And enforcement runs wider than the civil penalties usually quoted: the Department of Community Affairs, the Department of Environmental Protection, the Department of Health, or any agency with licensing or inspection authority over a building may bring an action for injunctive relief in the Superior Court.
Read the full text: P.L. 2024, c.66 — New Jersey Legislature
First Reprint (Downloadable PDF)
Approved 12 September 2024. Codified at N.J.S.A. 58:12A-12.10 et al. Free to read, no registration required.