Accredited Industrial Hygiene Testing Lab in Houston, TX

Yes. We perform Legionella testing by culture on cooling tower water, potable and hot water systems, and other building water samples, following ISO 11731:2017, with Legionella pneumophila serogroup 1 distinguished from serogroups 2–14 and non-pneumophila species. AGT Labs is a CDC ELITE member laboratory — a proficiency-testing programme for Legionella culture, not an accreditation. Standard turnaround is 10 days (the incubation period the method requires), with a preliminary result available at 3–5 days on request. We are the analytical laboratory — you or your consultant collect the samples. We ship a free sampling kit with a prepaid return label anywhere in the U.S.

Standard non-viable spore trap mold analysis completes in 5 business days. Viable culture testing (which grows the mold to confirm species) requires longer incubation. Rush options are available: 1-day (100% surcharge), 2-day (75%), 3-day (50%), or 4-day (25%). Our lab holds Texas TDLR Mold License LAB1070 and is AIHA EMLAP-accredited. We recommend collecting a concurrent outdoor sample so indoor counts can be compared against the outdoor baseline. Coordinate pickup with your Project Manager at (713) 453-6090.

We offer the full range of US mold testing methods: non-viable spore trap (Air-O-Cell-type cassettes counted by microscopy), viable culture (samples grown to identify species and assess viability), direct exam of tape lifts, swabs, and bulk materials, and MSQPCR (mold-specific quantitative PCR) for DNA-based species identification. For air sampling we recommend collecting a concurrent outdoor reference sample, since there is no universal "normal" indoor count — results are interpreted relative to the outdoor baseline. Our lab holds Texas TDLR Mold License LAB1070 and is AIHA EMLAP-accredited.

Our laboratory is at 10200 East Freeway, Suite 101, Houston, TX 77029, and every analysis is performed there — no subcontracting, no send-outs.

We accept ship-in samples from anywhere in the United States. We send a pre-labelled sampling kit with a prepaid return label — free when AGT Labs performs the analysis — and samples are logged the day they arrive when received before 2:00 PM CST, so an out-of-state client gets the same accreditation, methods, and rush options as a local one. Scheduled courier pickup runs across Houston, Bay City, Freeport, Lake Jackson, Victoria and Harlingen. Our AIHA-LAP, NVLAP and PJLA accreditations are ILAC Mutual Recognition Arrangement signatories, so reports are accepted nationwide.

PLM (Polarized Light Microscopy) identifies asbestos in bulk building materials and is the standard method for pre-renovation surveys. PCM (Phase Contrast Microscopy) measures airborne fiber concentrations during abatement and clearance monitoring. AGT Labs holds NVLAP accreditation (Lab Code 101793-0) for bulk PLM, and PJLA ISO/IEC 17025 accreditation (No. 137751) covering both bulk PLM and air PCM. Both methods also sit within our AIHA-LAP scope and our Texas DSHS asbestos licence (#300529).

Standard analyses complete in 5+ business days from the day the sample is logged in. Rush options from 1-day to 4-day are available per project estimate.

• 1 Business Day: 100% surcharge
• 2 Business Days: 75% surcharge
• 3 Business Days: 50% surcharge
• 4 Business Days: 25% surcharge

Rush time is counted from log-in at the lab, so if you're shipping from out of state, use overnight delivery to stay on the same schedule as a local client. Note: Unusable asbestos samples may incur additional prep fees. Bulk PLM layers billed individually.

BTEX and TO-15 testing measure airborne organic chemicals — benzene, toluene, ethylbenzene and xylenes, plus the wider EPA TO-15 canister list — in workplace air. You need this testing for OSHA compliance in refineries, chemical plants, painting operations, and indoor air quality investigations. AGT Labs performs BTEX charcoal-tube analysis and EPA TO-15 Summa canister analysis.

Total dust captures all airborne particles regardless of size. Respirable dust captures only particles small enough to reach the deep lung (typically under 4 micrometers). OSHA sets separate PELs for each fraction. Both are measured gravimetrically using personal air sampling pumps and pre-weighed filters.

Our lab covers OSHA 1910.1001 (Asbestos), 1910.1053 (Silica), 1910.1025 (Lead), 1910.1026 (Chromium VI), 1910.95 (Noise), and EPA AHERA/NESHAP. These are federal standards that apply in every state, so our reports serve compliance programs nationwide. Contact us to confirm method coverage for your specific application.

All accreditations are independently verifiable:

Yes. We provide a detailed itemized estimate before any work begins. Simply contact your Project Manager with your sample count, analysis type, and required turnaround. Volume discounts are available for ongoing monitoring programs.

Yes. Our IH lab is AIHA IHLAP-accredited (LAP-101470) for mercury vapor analysis using three methods: NIOSH 6009, OSHA ID-140, and OSHA ID-145 — all performed by Cold Vapor Atomic Absorption (CVAA). Mercury IH testing is critical for chlor-alkali plants, dental offices, fluorescent lamp recycling, and thermometer manufacturing facilities. The OSHA ceiling limit is 0.1 mg/m³. Rush turnaround is available.

Yes — aldehydes sit on two accredited platforms. By HPLC/UV: NIOSH 2016 (formaldehyde, active DNPH cartridge), OSHA 1007 (formaldehyde, diffusive/passive samplers), OSHA 64 (glutaraldehyde) and EPA TO-11 (15+ carbonyls speciated in one run). By GC/FID: NIOSH 2541 (formaldehyde on 2-HMP/XAD-2), NIOSH 2539 (12-analyte screening) and OSHA 72 (furfural). Aldehyde monitoring is required in healthcare, mortuaries, composite wood manufacturing, and textile processing. The OSHA PEL for formaldehyde is 0.75 ppm TWA with a 2 ppm STEL; the ACGIH TLV is far lower at 0.1 ppm TWA / 0.3 ppm STEL. Contact us for a project estimate.

Perry Johnson Laboratory Accreditation, Inc. (PJLA) is an independent accreditation body and an ILAC Mutual Recognition Arrangement signatory. AGT Labs holds PJLA Accreditation No. 137751 under Certificate No. L25-1037-R1, accredited to ISO/IEC 17025:2017 in the field of Environmental Testing and valid through February 21, 2027.

The scope covers asbestos in solid materials by EPA 600/R-93/116 (PLM) and asbestos in air by NIOSH 7400 (PCM). Bulk PLM is additionally NVLAP-accredited under Lab Code 101793-0, and both methods are covered by our Texas DSHS asbestos licence (#300529). Verify at pjlabs.com.