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06 · Environmental hazard

Chemicals
& off-gassing.

Volatile organic compounds are released by everyday materials — flooring, furniture, paint, cleaning products — often invisibly and without odor. Indoor concentrations regularly exceed outdoor levels, and individual sensitivity varies widely.

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Understand the signsExplore your options

You can take this one step at a time.
Start with what you notice.

MaterialsYour homeAir qualityTestingClarityYour next step

A place to begin

Understand the space.
Notice the patterns.

A guide to the building, the symptoms, and the questions worth asking.

01

Understand VOCs

The sources, pathways, and questions behind this topic.

↗02

Notice the signs

What to look for in your home and your daily patterns.

↗03

Explore testing

What different methods measure—and their limits.

↗04

Take the next step

Document, investigate, and get the right support.

↗

What It Is

VOCs, off-gassing, and everyday indoor exposures

Paint, flooring, furniture, cabinetry, and cleaning products can release volatile organic compounds. Emissions depend on the product, its age, temperature, humidity, and ventilation. Health effects vary by compound, concentration, and exposure duration.

Read more

VOCs are a broad group of chemicals released as gases from some solids and liquids. A total-VOC reading groups different compounds together; it does not describe the risk of each one.

Renovations and new materials can increase emissions. Some pressed-wood products, adhesives, and furnishings can emit formaldehyde.

Source identification and clean outdoor-air ventilation can help guide an assessment. Persistent irritation or other symptoms should also be evaluated medically.

Why It's Missed

Invisible exposure, familiar products, and individual sensitivity

VOCs are often invisible and may be odorless at typical indoor levels. When they do have a smell — fresh paint, new furniture, flooring, or the familiar “new car smell” — it is often seen as normal rather than a warning sign.

Read more

Familiarity with a product or fragrance does not establish its safety, and a lack of odor does not rule out emissions. Sensitivity and health effects vary.

Record product use, changes in the home, ventilation, and symptom timing. Consumer sensor trends can add context, but cannot diagnose chemical sensitivity or identify a specific illness.

Commonly reported symptoms

What people notice.

Symptoms have many possible causes. The pattern can support a conversation with a clinician; it does not identify a pollutant or establish a diagnosis.

HeadachesFatigue / brain fogEye irritationThroat / respiratory irritationDizzinessSkin reactions / rashesNauseaChemical sensitivity reactionsCognitive difficultySleep disruptionMood changesShortness of breath

Common Sources

Everyday materials.
Invisible emissions.

Where VOCs typically originate in the home. Use these clues to guide the questions you ask.

01

New or recently renovated spaces

Paints, primers, adhesives, caulks, grout sealers, flooring, and installation materials can off-gas heavily in the weeks or months after renovation. Ventilation during and after projects can help reduce buildup.

02

Pressed wood and composite materials

Particleboard, MDF, plywood, cabinetry, built-ins, furniture, and laminate flooring may release formaldehyde, especially when new. Off-gassing is often strongest in the first 1–2 years but can continue at lower levels over time.

03

Flooring and carpet

Vinyl flooring, carpet backing, adhesives, and some flooring finishes can release VOCs. New materials are often the strongest source, while older carpet may trap and re-release chemicals, dust, and particulates.

04

Cleaning products and air fresheners

Conventional cleaners, solvents, plug-in air fresheners, scented candles, aerosol sprays, and fragranced products can contribute significantly to indoor VOC levels — especially in enclosed spaces.

05

HVAC systems

HVAC systems and ductwork can spread VOCs throughout a home. Dust, buildup, or biological growth inside systems may also contribute microbial VOCs (mVOCs) to indoor air.

06

Mattresses and upholstered furniture

New mattresses, sofas, cushions, and upholstered furniture may off-gas from foam, flame retardants, adhesives, and fabric treatments. Because bedrooms are often less ventilated, exposure can feel more noticeable overnight.

How to test

Different tools.
A fuller picture.

No single test tells the full story. Combine the history of the home, appropriate testing, and a qualified inspection. View the methods and how they fit into a full assessment.

01

Photoionization detector (PID)

Real-time screening for responsive compounds.

Read details +

A PID provides real-time screening for compounds that respond to its lamp and sensor configuration. It does not measure all VOCs equally, identify individual chemicals, or directly establish health risk.

An experienced professional can use it to compare locations and identify when compound-specific sampling may be useful.

02

Passive air sampling (laboratory analysis)

Identify selected chemicals over a sampling period.

Read details +

Passive badges or sorbent samplers collect selected compounds over a defined period for laboratory analysis. Use the lab’s sampling duration, placement, and handling instructions.

The target compounds and method determine what the result can answer. No single panel measures every possible indoor chemical.

03

Formaldehyde-specific testing

A targeted method for a particular compound.

Read details +

Formaldehyde needs an appropriate compound-specific method. Consumer kits and sensors vary in accuracy and interference.

For a consequential decision, discuss validated sampling and laboratory analysis with a qualified indoor air professional.

04

Consumer VOC monitors

Track trends with a clear understanding of the sensor.

Read details +

Choose a device that actually measures or estimates VOCs; many air-quality monitors measure only particles or CO₂. Read its sensor specifications and limitations.

Use trends to compare product use, ventilation, and rooms. A total-VOC value does not identify a compound or diagnose an exposure-related condition.

05

Professional indoor air quality assessment

Connect source history, sampling, and ventilation.

Read details +

A certified industrial hygienist can conduct a comprehensive assessment, typically including:

  • Compound-specific sampling
  • Source identification
  • Ventilation evaluation
  • A written report with mitigation recommendations

What to do next

Start small.
Take the next step.

Use this checklist to organize what you’ve documented, discussed, or arranged. Address urgent safety concerns first.

  • Use suitable outdoor air. Consider outdoor pollution, weather, and building ventilation needs.
  • Check pressure effects. Ask a professional before relying on strong exhaust around naturally drafted combustion appliances.
  • Build a short timeline. List paint, furniture, flooring, renovations, and cleaning products.
  • Prioritize likely sources. Discuss removing or isolating an identified source where practical.
  • Read beyond the label. Look for relevant emissions testing and follow use instructions.
  • Simplify daily products. Consider fragrance-free options and avoid unnecessary solvents or sprays.
  • Evaluate materials first. Ask whether removal, replacement, or a suitable barrier is appropriate.
  • Consider new emissions. A coating or sealant can itself release VOCs; review compatibility and ventilation.
  • Know the difference. HEPA captures particles; gas-phase media may reduce selected gases.
  • Check capacity and upkeep. Performance depends on the compound, media, airflow, and replacement schedule. Avoid ozone-generating devices.
  • Use qualified support. Discuss persistent reactions with a clinician and environmental findings with an indoor air professional.
  • Keep evidence together. Sensor trends do not diagnose chemical sensitivity, MCAS, or a specific exposure.

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A little more clarity.

CHRONICALLY EXPOSED · RESOURCE

Read the full article on indoor air quality

What shapes the air inside a home, and the changes that tend to help most.

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CHRONICALLY EXPOSED · RESOURCE

Download the VOC and off-gassing checklist

Track new materials, products, and reactions that follow renovations.

Download checklist ↓

Further guidance: EPA · VOCs · EPA · Air cleaners

Explore other exposure & health topics
Carbon monoxide ↗Natural gas leak ↗Sewer gas ↗Plumbing / ventilation ↗Chemicals / VOCs ↗Water quality ↗Air pathways ↗MCAS ↗POTS / dysautonomia ↗Chronic fatigue ↗Immune dysregulation ↗Neurological ↗Respiratory ↗Musculoskeletal ↗Detox pathways ↗

A clearer path forward

Notice what changed.
Then look for the source.

Bring your product history, room-by-room observations, and relevant test results together. Source control and suitable ventilation can guide a practical plan.

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