Lead Testing in NYC: Types, Requirements, and How to Get Your Property Tested

You need lead testing for a property in New York City. Maybe you're a landlord facing Local Law 31 compliance, a parent concerned about your child's exposure, a contractor planning renovation work, or a buyer conducting due diligence on a pre-war building.

The challenge is that "lead testing" covers several different types of testing, each serving different purposes. Understanding your options helps you get the right test for your situation—and avoid paying for testing you don't need.

Here's what NYC property owners need to know about lead testing: the types available, when they're required, what they cost, and how to get started.

Types of Lead Testing Available in NYC

Lead can be tested in paint, dust, soil, and water. Each type of testing answers different questions and serves different purposes.

Lead paint testing

The most common type in NYC. Lead paint testing determines whether painted surfaces contain lead-based paint, defined as paint with lead content at or above 1.0 mg/cm² (or 0.5% by weight).

Two primary methods:

  • XRF (X-ray fluorescence) testing: Non-destructive, instant results, tests paint in place. The standard for large-scale surveys and Local Law 31 compliance.

  • Paint chip sampling: Removes small paint samples for laboratory analysis. More precise but destructive and slower.

For detailed information on XRF testing specifically, see our complete XRF lead testing guide.

Lead dust testing (dust wipe sampling)

Measures lead dust contamination on surfaces—floors, window sills, window wells. Lead dust is the primary pathway for childhood lead exposure, making this testing critical for occupied spaces, especially those with young children.

Dust wipe testing is used for:

  • Clearance testing after lead paint work

  • Investigating potential exposure sources

  • Verifying cleaning effectiveness

  • Assessing ongoing contamination risk

Results are reported in micrograms per square foot (µg/ft²) and compared against EPA/HUD clearance standards: 5 µg/ft² for floors, 40 µg/ft² for window sills, and 100 µg/ft² for window troughs/wells (updated October 2024).

Lead in soil testing

Measures lead contamination in exterior soil. Urban areas like NYC often have elevated soil lead levels from decades of lead paint weathering and leaded gasoline deposits. Soil testing matters for:

  • Properties with children who play outside

  • Urban gardening and food growing

  • Construction projects disturbing soil

  • Environmental assessments

Lead in water testing

Tests drinking water for lead contamination, typically from lead service lines or lead solder in plumbing. While not related to lead paint, water testing is increasingly requested by NYC property owners and tenants concerned about building plumbing.

Which type do you need?

Your Situation

Testing Type Needed

Local Law 31 compliance

XRF paint testing

Pre-renovation assessment

XRF or paint chip testing

Child with elevated blood lead

Dust wipe + paint testing

Post-abatement clearance

Dust wipe testing

Real estate transaction

XRF paint testing (typically)

Concerned about drinking water

Water testing

Urban garden/outdoor play area

Soil testing

When Does NYC Require Lead Testing?

NYC has multiple regulations that can trigger lead testing requirements. Understanding which apply to your situation helps you plan accordingly.

Local Law 31 of 2020

The most significant lead testing mandate for NYC property owners. Local Law 31 requires lead paint inspections for:

  • Multiple dwellings (3+ units) built before 1960

  • Buildings built 1960-1978 where lead paint is known/presumed or a child under 6 resides

The initial compliance deadline was August 9, 2025. Buildings that haven't been inspected face active HPD enforcement. Inspections must be performed by EPA-certified inspectors using XRF analyzers.

For complete LL31 requirements, see our NYC Local Law 31 compliance guide.

Local Law 1 of 2004 (Childhood Lead Poisoning Prevention Act)

Requires building owners to:

  • Conduct annual investigations in units where children under 6 reside

  • Remediate lead paint hazards using safe work practices

  • Provide tenant notices about lead paint

  • Follow specific protocols during apartment turnover

While LL1 focuses on visual assessment and maintenance rather than XRF testing, testing may be needed to verify conditions or support remediation decisions.

Child blood lead level response

When a child is identified with an elevated blood lead level (≥3.5 µg/dL, the CDC reference value since 2021), the NYC Department of Health and Mental Hygiene (DOHMH) conducts investigations that typically include:

  • Dust wipe sampling in the home

  • XRF paint testing

  • Assessment of potential lead sources

Property owners may be required to remediate identified hazards.

Renovation and construction

The EPA's Renovation, Repair, and Painting (RRP) Rule requires that renovations disturbing more than 6 square feet of interior painted surfaces or 20 square feet of exterior painted surfaces in pre-1978 housing be performed by EPA-certified renovators using lead-safe work practices. Testing can confirm whether lead paint is present (alternatively, contractors can presume lead and follow safe practices without testing).

NYC DOB may require lead documentation for certain permits, particularly for work in occupied residential buildings.

Real estate transactions

Federal law (Title X, Section 1018) requires sellers and landlords of pre-1978 housing to disclose known lead paint hazards, provide the EPA "Protect Your Family From Lead in Your Home" pamphlet, and allow buyers a 10-day inspection period. Records must be retained for 3 years. While testing isn't mandated, many buyers request lead inspections as part of due diligence, and some lenders require documentation for pre-1978 properties.

XRF Testing vs. Paint Chip Sampling vs. Dust Wipe Testing

These three methods are the most common for residential lead assessment. Understanding their differences helps you choose appropriately.

XRF (X-ray fluorescence) testing

Aspect

Details

What it tests

Lead content in paint, in place

Method

Handheld device pressed against surface

Results

Immediate (seconds per reading)

Destructive?

No—surfaces undamaged

Best for

Large surveys, compliance inspections, screening

Limitations

Substrate interference possible; measures total lead, not just surface

Typical cost

$300-$600 per unit (NYC)

XRF is the standard for Local Law 31 inspections and most large-scale lead paint surveys. Its speed and non-destructive nature make it practical for testing hundreds of surfaces.

For more on XRF technology, see our XRF testing NYC guide.

Paint chip (laboratory) sampling

Aspect

Details

What it tests

Lead content in paint sample

Method

Remove paint chip, send to lab

Results

3-7 days (standard); 24-48 hours (rush)

Destructive?

Yes—removes paint from surface

Best for

Confirming XRF results, precise measurements, legal matters

Limitations

Slower; damages surfaces; samples only tested areas

Typical cost

$25-$50 per sample plus collection fee

Paint chip sampling provides highly precise results and can identify lead content in specific paint layers. It's useful for confirming borderline XRF readings or when maximum precision is needed.

Dust wipe sampling

Aspect

Details

What it tests

Lead dust on surfaces

Method

Wipe defined area with special wipe, send to lab

Results

3-7 days (standard); 24-48 hours (rush)

Destructive?

No

Best for

Clearance testing, exposure assessment, health investigations

Limitations

Point-in-time measurement; contamination can recur

Clearance standards

Floors: 5 µg/ft², Sills: 40 µg/ft², Wells: 100 µg/ft²

Typical cost

$15-$30 per wipe plus collection fee

Dust wipe testing is essential for clearance after lead work and for assessing exposure risk in occupied spaces. It measures what's actually available for contact—the lead dust that children can ingest.

Which should you choose?

Situation

Recommended Method

Local Law 31 compliance

XRF (required)

Pre-renovation screening

XRF

Post-abatement clearance

Dust wipe

Child health investigation

Dust wipe + XRF

Confirming borderline XRF result

Paint chip

Legal dispute requiring precision

Paint chip

Routine exposure monitoring

Dust wipe

Many situations benefit from combining methods—for example, XRF testing to identify lead paint locations, followed by dust wipe testing to assess current contamination levels.

Lead Testing for Different Situations

Different circumstances call for different testing approaches. Here's what to consider for common scenarios.

Landlords facing Local Law 31 compliance

You need XRF testing of all dwelling units and common areas by an EPA-certified inspector. This isn't optional—it's legally required, and HPD is actively enforcing.

What to do:

  1. Confirm your building's LL31 status

  2. Schedule XRF inspection with a certified provider

  3. Coordinate tenant access

  4. Retain inspection records for 10+ years

  5. Address any lead hazards identified

Timeline: Allow 2-4 weeks from scheduling to completed inspection for most buildings.

Parents concerned about child exposure

If you're worried about lead exposure in your home, start with dust wipe testing—it measures actual contamination levels and exposure risk. If dust lead is elevated, XRF testing can identify the source.

What to do:

  1. Request dust wipe testing for floors, window sills, and window wells

  2. If elevated, get XRF testing to locate lead paint

  3. Consider having your child's blood lead level tested (talk to pediatrician)

  4. Address identified hazards with proper remediation

If your child already has elevated blood lead, DOHMH will likely conduct an investigation including testing.

Contractors planning renovation

Before disturbing painted surfaces in pre-1978 buildings, you need to know whether lead paint is present. Options:

  • Test first: XRF or paint chip sampling of areas to be disturbed

  • Presume and proceed: Assume lead is present and follow RRP lead-safe work practices

Testing costs money but can save money if results show no lead—you won't need full lead-safe protocols. For large projects, testing usually makes economic sense.

Buyers conducting due diligence

For pre-1978 NYC properties, lead paint is likely present. Testing provides documentation of conditions and identifies any immediate hazards.

What to request:

  • XRF survey of representative areas (or full survey for comprehensive assessment)

  • Review of any existing lead inspection records

  • LL31 compliance status (for covered buildings)

Factor findings into negotiations and post-purchase planning.

Property managers handling turnover

NYC's Local Law 1 requires specific turnover procedures for units in pre-1960 buildings (and pre-1978 buildings with children). While full XRF testing isn't required at every turnover, you must:

  • Conduct visual assessment for deteriorated paint

  • Remediate any deteriorated lead paint using safe work practices

  • Clean unit to remove lead dust

Dust wipe testing after turnover work can verify cleaning effectiveness and provide documentation.

Lead Testing Cost in NYC

Costs vary by testing type, scope, and turnaround requirements.

XRF paint testing:

Scope

Cost Range

Single apartment

$300–$500

Small multi-family (3-6 units)

$500–$900

Medium building (7-15 units)

$800–$1,500

Large building (16-30 units)

$1,200–$2,500

Pre-renovation survey (limited scope)

$250–$500

Dust wipe testing:

Scope

Cost Range

Single room clearance (3-4 wipes)

$150–$250

Apartment clearance (8-12 wipes)

$250–$400

Comprehensive dust assessment

$300–$500

Rush laboratory analysis

Add $50–$100

Paint chip sampling:

Scope

Cost Range

Per sample (lab analysis)

$25–$50

Collection/site visit fee

$150–$300

Rush laboratory analysis

Add $30–$50/sample

Water testing:

Scope

Cost Range

Single tap (first draw + flush)

$50–$100

Multiple taps

$30–$60 per additional

Comprehensive building assessment

$200–$500

What affects pricing:

  • Number of units/samples: More = higher cost

  • Building complexity: Pre-war buildings with ornate trim take longer

  • Turnaround requirements: Rush service adds 25-50%

  • Access coordination: Multiple visits for missed units cost extra

  • Report requirements: Specialized documentation may cost more

How to Schedule Lead Testing in NYC

Ready to get your property tested? Here's the process.

Step 1: Determine what testing you need

Review the earlier sections to identify which type(s) of testing apply to your situation. If you're unsure, a qualified provider can assess your needs during an initial consultation.

Step 2: Verify provider qualifications

For XRF paint testing (including Local Law 31):

  • EPA-certified lead inspector or risk assessor

  • For LL31: Must be independent from building owner

For dust wipe and paint chip sampling:

  • Trained in proper collection protocols

  • Uses NVLAP-accredited laboratory

  • For NYC: Lab should also have NYS ELAP certification

Step 3: Get quotes and schedule

Contact providers with:

  • Property address and type

  • Building age (or best estimate)

  • Number of units (if applicable)

  • Specific testing needed

  • Timeline requirements

Compare quotes on scope (what's included), timeline, and total cost—not just price.

Step 4: Prepare for testing

For XRF testing:

  • Coordinate tenant access (provide advance notice)

  • Ensure all areas are accessible

  • Have building staff available to assist

For dust wipe testing:

  • Don't clean tested surfaces immediately before sampling (creates false negatives)

  • Keep areas undisturbed before collection

Step 5: Review results and plan next steps

Your report will identify what testing found. If lead hazards are identified:

  • Prioritize based on condition and occupancy

  • Use certified contractors for remediation

  • Consider clearance testing after work

  • Update your maintenance protocols

 

 

Get Lead Testing for Your NYC Property

Whether you need Local Law 31 compliance, pre-renovation assessment, or answers about potential exposure, professional lead testing provides the information you need to make informed decisions and protect occupants.

UNYSE provides comprehensive lead testing services across NYC, including XRF inspections, dust wipe sampling, and paint chip analysis. Our EPA-certified inspectors understand NYC's lead regulations and can guide you through compliance requirements.

Need lead testing in NYC? Contact UNYSE to discuss your situation and get a quote. We'll help you determine exactly what testing you need and get it scheduled on your timeline.