Indoor Air Quality Testing (IAQ) Lab Houston TX

AIHA LAP-accredited indoor air quality testing lab at 10200 East Freeway, Houston TX 77029. EPA TO-15 GC-MS VOC analysis, NIOSH 2016 formaldehyde, airborne mold spore counts, and CO₂ ventilation assessments. LEED v4 IAQ certification, ASHRAE 62.1 compliance, and Sick Building Syndrome investigation support. Samples received before 2:00 PM CST logged same day.

ISO/IEC 17025 Accredited AIHA LAP · ID: LAP-101470 LEED v4 IAQ Certified Rush Turnaround Available
Get a Quote Download COC
What's onthis page Quick links to page sections
Why It MattersHealth & compliance
What Is IAQ?Testing explained
6 IAQ ParametersCO₂ · VOCs · PM
StandardsASHRAE · LEED
Lab LogisticsTAT & Media
WorkflowSubmit samples
Who We ServeFacilities
FAQCommon questions
Related ServicesMold · Asbestos · VOC
Why Indoor Air Quality Testing Matters

Poor indoor air quality drives up absenteeism, decreases productivity, and invites legal liability

Sick Building Syndrome (SBS)

Occupants experiencing headaches, fatigue, and respiratory irritation often suffer from SBS linked to poor ventilation, mold, or VOCs. Indoor air quality testing identifies the exact chemical or biological culprits so remediation targets the root cause rather than symptoms.

Employee Productivity

Elevated CO₂ levels directly correlate with cognitive decline and reduced decision-making capability. Routine indoor air quality testing ensures HVAC systems are delivering adequate fresh air per ASHRAE 62.1 — typically maintaining CO₂ below 1,000–1,200 ppm above outdoor baseline.

Green Building Certifications

LEED v4, WELL, and Fitwel building standards require rigorous indoor air quality testing for specific VOCs, particulates, and formaldehyde before a building can be certified for occupancy. AGT Labs provides the EPA TO-15 and TO-11A analysis required for USGBC IAQ Assessment credits.

Liability & Tenant Complaints

Unresolved air quality complaints can lead to lease breaks, workers' compensation claims, and litigation. Accredited laboratory indoor air quality testing provides the defensible data needed to protect property owners — or to substantiate a claim when building systems are genuinely failing.

Indoor air quality testing CO2 VOC formaldehyde monitoring commercial building Houston TX LEED ASHRAE compliance
What Is Indoor Air Quality Testing?

The Systematic Measurement of a Building's Internal Environment for Occupant Health & Comfort

Indoor air quality testing is the systematic measurement of a building's internal environment to assess the health and comfort of its occupants. It combines real-time field measurements (temperature, humidity, and CO₂) with precise laboratory analysis for complex contaminants like volatile organic compounds (VOCs), formaldehyde, and mold spores.

As an AIHA LAP accredited laboratory, AGT Labs partners with industrial hygienists and facility managers to provide the laboratory analysis portion of IAQ investigations. We supply specialized sampling media — such as SUMMA canisters for EPA TO-15 and DNPH cartridges for formaldehyde — and deliver certified results compared against ASHRAE, EPA, and LEED standards.

  • Laboratory analysis of TO-15 VOCs, formaldehyde, and airborne mold spores
  • Comparison against LEED v4, ASHRAE 62.1, and EPA guidelines
  • Support for Sick Building Syndrome (SBS) investigations
  • Post-construction material off-gassing assessments
  • Sampling media and kits provided to field consultants at no charge
Key IAQ Metrics

The 6 Core Parameters of Indoor Air Quality Testing

A comprehensive indoor air quality testing survey evaluates these six critical parameters to provide a complete picture of building health.

VOCs & TVOC

Volatile Organic Compounds off-gas from paints, carpets, furniture, and cleaning supplies. We analyze whole-air samples via EPA TO-15 (SUMMA canisters) to speciate 60+ individual VOCs down to ppb levels — identifying specific sources within the building envelope.

Method:EPA TO-15 / GC-MS
LEED Limit:TVOC < 500 µg/m³

Carbon Dioxide (CO₂)

CO₂ is the primary indicator of ventilation efficiency in occupied buildings. High levels indicate inadequate fresh air intake, leading to occupant fatigue, reduced cognitive function, and "stuffy" air. Typically measured in the field using direct-read NDIR monitors or validated sampling tubes.

Source:Human respiration
ASHRAE 62.1:< 700 ppm above outdoor

Mold & Bioaerosols

Airborne fungal spores indicate moisture intrusion or HVAC hygiene issues. We analyze Air-O-Cell spore traps for non-viable total spore counts by direct microscopy and culture plates for viable species identification — providing both quantitative and speciation data for remediation targeting.

Method:Microscopy / Culture
Guideline:Indoor < Outdoor levels

Formaldehyde

A specific, highly irritating VOC found in pressed wood products, glues, and insulation. Because it is highly reactive, formaldehyde requires specialized DNPH-coated sorbent tube collection and HPLC analysis — separate from a standard EPA TO-15 scan and not captured by SUMMA canisters alone.

Method:NIOSH 2016 / EPA TO-11A
LEED Limit:< 27 ppb

Particulate Matter (PM2.5 / PM10)

Fine dust and aerosols from outdoor pollution, copiers, or construction activities infiltrating the HVAC system. PM2.5 penetrates deep into the lungs and is linked to cardiorespiratory disease. Measured via real-time laser photometers in the field or gravimetric filter analysis in the lab.

Method:Direct-read / Gravimetric
EPA Standard:PM2.5 < 12 µg/m³ (annual)

Carbon Monoxide (CO)

An odorless, potentially deadly gas produced by incomplete combustion. Sources include vehicle exhaust entrainment into HVAC intakes, faulty furnaces, or improperly vented generators. Typically monitored via real-time electrochemical sensors in the field; AGT Labs can analyze passive CO badges when area-integrated data is required.

Source:Combustion / Exhaust
EPA Limit:9 ppm (8-hour)
Regulatory & Certification Frameworks

Standards Governing Indoor Air Quality Testing

Unlike industrial occupational settings governed strictly by OSHA, commercial and residential indoor air quality testing relies on consensus guidelines from ASHRAE, the EPA, and green building councils.

LEED v4 / v4.1 IAQ Assessment
The USGBC requires rigorous indoor air quality testing before building occupancy. AGT Labs provides the EPA TO-15 and TO-11A analysis required to prove TVOCs (< 500 µg/m³), Formaldehyde (< 27 ppb), and target chemicals meet the strict LEED thresholds for IAQ Assessment credits.
ASHRAE Standard 62.1
"Ventilation for Acceptable Indoor Air Quality" is the primary standard for commercial HVAC design. It specifies minimum ventilation rates and uses CO₂ differentials (< 700 ppm above outdoor) as the primary metric for adequate fresh air delivery to occupied zones.
EPA IAQ Guidelines
The EPA provides comprehensive guidelines for managing indoor air quality in schools and commercial buildings — including the I-BEAM framework and "Tools for Schools" program — setting the baseline recommendations for parameter limits when specific OSHA occupational regulations do not apply.
Lab AccreditationISO/IEC 17025:2017
IH Lab AccreditationAIHA LAP · ID: LAP-101470
IAQ MethodologiesEPA TO-15 · NIOSH 2016
Lab LocationHouston TX · In-House Analysis
Lab Logistics

Turnaround Times & IAQ Sampling Media

We supply consultants and facility teams with the necessary analytical media to conduct comprehensive indoor air quality testing.

Turnaround Options — TO-15 VOCs · Formaldehyde · Mold · Gravimetric
1-Day Rush1 business day+100%
2-Day Rush2 business days+75%
3-Day Rush3 business days+50%
4-Day Rush4 business days+25%
Standard7+ business daysNo Surcharge
Samples received before 2:00 PM CST are logged same day. Call (713) 453-6090 to confirm rush availability for TO-15 canisters — GC-MS scheduling may require advance coordination for 1-day requests.

IAQ Testing Kits & Media — Provided Free

  • Certified SUMMA Canisters (1L and 6L) for whole-air VOC sampling — EPA TO-15
  • Calibrated flow controllers for integrated 8–24 hour sampling
  • DNPH cartridges for Formaldehyde (NIOSH 2016 / EPA TO-11A)
  • Air-O-Cell spore trap cassettes for airborne mold counts
  • Pre-weighed PVC filters for gravimetric particulate analysis
  • Calibrated personal/area air sampling pumps (loaner)
  • Pre-paid return shipping and Chain of Custody forms
Download IH COC Form
Submission Workflow

How to Submit IAQ Samples

1

Request Media

Contact AGT Labs to request SUMMA canisters, flow controllers, DNPH cartridges, and specific sorbent tubes for your indoor air quality testing plan. Allow 5 business days for kit preparation.

2

Deploy in Field

Set up canisters or pumps in representative indoor zones. Ensure HVAC is operating normally to simulate typical occupant conditions. Position sampling points at breathing zone height (3–5 ft).

3

Ship to Houston Lab

Close canister valves securely. Complete the COC with sampling locations and HVAC status. Ship via UPS or use our local Houston courier pickup service for same-day receipt.

4

Laboratory Analysis

Samples undergo GC-MS (TO-15 VOCs), HPLC (Formaldehyde), or direct microscopy (Mold) in our AIHA LAP accredited Houston facility. All analysis in-house — no send-outs.

5

IAQ Report Delivered

Certified results including concentration data, method detection limits, comparison to LEED v4, ASHRAE 62.1, and EPA guidelines. AIHA LAP accreditation number on every report.

Industries & Clients

Facilities Requiring Indoor Air Quality Testing

Commercial Office Buildings

Investigating tenant complaints, "stuffy air" reports, and Sick Building Syndrome symptoms by verifying HVAC ventilation rates and analyzing for VOC off-gassing from office furniture or recent renovations. Common in Houston's Energy Corridor, Galleria, and downtown high-rises where densely occupied floors strain air exchange capacity.

Healthcare Facilities & Hospitals

Protecting vulnerable patients by ensuring strict indoor air quality testing compliance, verifying cleanroom particle counts, and monitoring for anesthetic gases or sterilization chemicals (like ethylene oxide) in the ambient air. The Texas Medical Center — the world's largest medical complex — demands rigorous IAQ standards for patient safety and accreditation.

Schools & Universities

Assessing classroom CO₂ levels to ensure optimal learning environments, testing for legacy hazards (like asbestos or lead dust from older building materials), and performing mold testing after plumbing leaks or storm water intrusion. Houston ISD — Texas's largest school district — and area universities require routine indoor air quality testing to support facility management programs.

Client Support

Indoor Air Quality Testing — FAQ

What is Indoor Air Quality (IAQ) testing?
Indoor air quality testing involves measuring the physical, chemical, and biological characteristics of air within commercial buildings, schools, and healthcare facilities. Testing typically assesses CO₂, CO, TVOC, PM2.5 and PM10, Formaldehyde, and airborne mold spores to ensure the environment is healthy and comfortable for occupants. AGT Labs provides the laboratory analysis portion — EPA TO-15 GC-MS for VOCs, NIOSH 2016 HPLC for formaldehyde, and direct microscopy for mold spore counts.
When should I conduct indoor air quality testing?
Indoor air quality testing should be conducted when building occupants report health complaints (headaches, fatigue, respiratory irritation) linked to Sick Building Syndrome (SBS). It is also required for LEED v4 or WELL certifications, after major renovations to check for off-gassing of new materials, following water damage events to check for mold, or as part of routine HVAC maintenance to verify ASHRAE 62.1 ventilation compliance. In Houston, many IAQ investigations follow hurricane flooding events.
What are the acceptable levels for CO2 in an office building?
While OSHA's PEL for CO₂ is 5,000 ppm, this is an industrial occupational limit. For indoor air quality and occupant comfort, ASHRAE Standard 62.1 recommends maintaining indoor CO₂ no greater than 700 ppm above outdoor ambient. Since outdoor CO₂ is typically around 400 ppm, indoor levels should ideally remain below 1,000 to 1,200 ppm to indicate adequate fresh air ventilation and prevent occupant drowsiness and cognitive impairment.
Does AGT Labs provide testing for LEED v4 IAQ certification?
Yes. AGT Labs provides the laboratory analysis required for LEED v4/v4.1 Indoor Air Quality Assessment credits. We analyze SUMMA canisters for TVOC and speciated target VOCs (EPA TO-15), as well as specific sorbent tubes for Formaldehyde (EPA TO-11A / NIOSH 2016) to ensure post-construction airborne contaminant levels meet the strict USGBC thresholds (< 500 µg/m³ TVOC, < 27 ppb Formaldehyde) prior to occupancy certification.
How are VOCs tested in an indoor environment?
Total VOCs (TVOC) can be screened in real-time using a handheld PID meter. However, for defensible indoor air quality testing and identification of specific chemical sources, a "whole air" sample is collected over an 8–24 hour period using an evacuated SUMMA canister. The canister is then sent to AGT Labs for EPA TO-15 GC-MS analysis, which identifies and quantifies 60+ specific volatile organic compounds down to the parts-per-billion (ppb) level.
What media is required for formaldehyde testing?
Formaldehyde requires specific sampling media — typically a DNPH-coated silica gel cartridge (e.g., SKC 226-119) with a personal or area sampling pump, or a passive diffusion badge. The sample is analyzed by HPLC per NIOSH 2016 or EPA TO-11A. Formaldehyde cannot be captured by a standard SUMMA canister — it must be collected on dedicated sorbent media and is reported separately from the TO-15 VOC scan. AGT Labs provides DNPH cartridges in all IAQ testing kits.
What turnaround times do you offer for IAQ laboratory analysis?
For lab-based indoor air quality testing parameters like TO-15 VOCs, Formaldehyde (HPLC), and Mold Spore Traps, our standard turnaround is 7+ business days at no surcharge. Rush options are available at 4-day (+25%), 3-day (+50%), 2-day (+75%), and 1-day (+100%). Samples received before 2:00 PM CST are logged on the same day. Call (713) 453-6090 to confirm 1-day GC-MS scheduling in advance.
Can AGT Labs supply sampling equipment for IAQ investigations?
Yes. With 5 business days' notice, AGT Labs can provide sampling kits including certified SUMMA canisters with flow controllers, DNPH formaldehyde media, Air-O-Cell mold spore trap cassettes, and calibrated air sampling pumps. This allows industrial hygiene consultants and facility managers to conduct comprehensive indoor air quality testing surveys without sourcing media separately. Contact (713) 453-6090 to request a kit.
Houston TX Laboratory

Indoor Air Quality Testing Lab Serving Houston's Commercial, Medical, and Educational Sectors

AGT Labs is located at 10200 East Freeway, Suite 101, Houston TX 77029. All EPA TO-15 GC-MS, NIOSH 2016 HPLC, and mold spore analysis is performed in-house. No send-outs. Samples received before 2:00 PM CST logged same day.

Commercial Real Estate
Energy Corridor & Downtown
Houston's densely occupied Energy Corridor and downtown high-rise office portfolio generates frequent indoor air quality testing requests for HVAC-related tenant complaints, renovation off-gassing investigations, and LEED certification requirements for new and repositioned commercial properties.
Healthcare Sector
Texas Medical Center
The Texas Medical Center — the world's largest medical complex — requires rigorous indoor air quality testing to protect immunocompromised patients, verify cleanroom integrity, and ensure anesthetic gas levels in surgical suites remain within safe limits for both patients and healthcare workers.
Education Sector
Schools & Universities
Houston ISD — Texas's largest school district — and area universities (Rice, UH, Texas Southern) require periodic indoor air quality testing for classroom CO₂ compliance, mold assessment after plumbing failures, and post-construction VOC clearance for newly built or renovated buildings.
Storm Recovery
Post-Flood Remediation
Hurricane Harvey (2017) and subsequent flood events left a legacy of water-damaged commercial and institutional buildings throughout Harris County. Post-remediation indoor air quality testing — combining mold spore clearance with VOC assessment for residual chemical contamination — remains a significant share of Houston IAQ testing work.
500
µg/m³ TVOC
LEED v4 Limit
<27
ppb Formaldehyde
LEED v4 Limit
1-Day
Rush TAT
Emergency IAQ
77029
Houston TX
10200 E. Freeway

Ready to Analyze Your IAQ Samples?

ISO/IEC 17025 Accredited · EPA TO-15 · Formaldehyde HPLC · Mold Spores · Rush TAT Available · Houston TX

Get a Quote Call (713) 453-6090