Lead paint rules by state

New Jersey lead paint rules in brief

Municipalities must inspect, or have a certified lead evaluation contractor inspect, certain single-family, two-family and multiple rental dwellings for lead-based paint hazards every three years or at tenant turnover, unless there is a valid lead-safe certification. Owners and landlords may hire a certified lead evaluation contractor directly (NJ DCA).
DCA certifies lead evaluation and abatement contractors. NJDOH licenses the individual inspector/risk assessors, who must work for a DCA-certified contractor (NJDOH).
DCA asks you to confirm a contractor's certification at (609) 633-6224 before hiring.

Sources: NJ DCA lead-safe rental law (P.L.2021, c.182). Plain-language summary, not legal advice. Confirm with the agency.

New York State does not run its own lead-based paint activities certification. EPA certifies firms and individuals there, and EPA's locator is the official lookup.
In New York City, Local Law 1 of 2004 places lead-paint duties on landlords of older multiple dwellings where young children live. NYC HPD explains the current inspection and XRF-testing requirements.
Lead-based paint inspections and risk assessments in pre-1978 housing must be done by EPA-certified inspectors or risk assessors working for an EPA-certified firm.

Sources: EPA lead-based paint program, NYC HPD lead-based paint. Plain-language summary, not legal advice. Confirm with the agency.

Under the Massachusetts Lead Law, homes built before 1978 where a child under 6 lives must have lead hazards corrected. A licensed lead inspector or risk assessor does the inspection.
Inspectors and risk assessors are licensed individually; the state list gives their city, phone and email.
Deleading itself must be done by a licensed deleading contractor (or, for some tasks, the owner after training). That list isn't included here yet.

Sources: Massachusetts Lead Law (M.G.L. c. 111, ss. 189A-199B). Plain-language summary, not legal advice. Confirm with the agency.