GPCB Approved · NABL Accredited CC-2480 · Est. 2004
Stack Emission Testing
Flue Gas Analysis
in Gujarat
NABL-accredited stack emission testing and flue gas analysis across Gujarat — SPM, SO₂, NOₓ, CO, HCl, HF, VOCs, heavy metals, and dioxins. Isokinetic sampling at all stack types with GPCB-compliant reports for consent renewal and environmental compliance.
GPCB Approved
NABL CC-2480
Isokinetic
Stack Sampling
— WHAT IS STACK EMISSION TESTING —
Stack Emission Testing —
What It Is & Why It's Required
Stack emission testing is the measurement of air pollutants discharged from industrial chimneys, stacks, vents, and combustion sources — at the point of emission. It is mandated by GPCBunder the Air (Prevention and Control of Pollution) Act 1981 and is a critical component of every industry's Consent to Operate (CTO) conditions in Gujarat.
Mandatory under GPCB Consent Conditions
Every GPCB CTO specifies the stacks/sources to be tested, parameters to be measured, applicable emission limits, and testing frequency. Non-compliance with testing or emission limits can result in consent cancellation.
NABL Accreditation Required
GPCB accepts stack emission reports only from NABL-accredited or GPCB-approved laboratories. Prism's NABL accreditation CC-2480 covers all major stack emission parameters.
Performance Verification Tool
Stack testing verifies the effectiveness of your pollution control equipment — scrubbers, bag filters, ESPs, cyclones — and helps identify when maintenance or upgrades are needed.
What Our Stack Test Report Includes
NABL-format, GPCB-accepted documentation
Parameters We Test — At a Glance
NABL AccreditedParticulates
SPM · PM10 · PM2.5 (Isokinetic)
Combustion Gas
SO₂ · NOₓ · CO · CO₂ · O₂
Acid Gases
HCl · HF · H₂S · NH₃ · Cl₂
VOCs
NMVOC · BTX · Formaldehyde
Heavy Metals
Hg · Pb · Cd · As · Cr · Ni
Stack Params
Velocity · Flow · Temp · Moisture
— WHAT YOU GET —
Every Stack Emission Test Includes
From isokinetic onsite sampling to NABL-accredited reports — complete stack testing service for GPCB compliance.
Onsite Stack Sampling
NABL-trained team travels to your facility with isokinetic sampling train, portable flue gas analyzer, and calibrated instruments for all stack types.
NABL-Accredited Analysis
SPM by gravimetry, gaseous pollutants by electrochemical/NDIR, heavy metals by AAS/ICP-OES — all at our NABL laboratory CC-2480.
GPCB-Compliant Reports
Stack emission test reports in NABL format with all QA/QC documentation, consent limit comparison, and compliance statement — ready for GPCB submission.
Compliance Trending
Historical trend analysis of your stack emission data — identifying improving or worsening emission parameters for proactive compliance management.
Fast Report Turnaround
NABL report delivered within 5–7 working days of sample collection. Urgent 2–3 day delivery available for consent renewal deadlines.
Pollution Control Verification
Test results verify scrubber, bag filter, ESP, and cyclone performance — identifying efficiency loss and when equipment maintenance/upgrade is needed.
Mass Emission Rate Calculation
Pollutant mass emission rates (kg/hr) calculated from concentration and volumetric flow — enabling comparison with CPCB mass-based emission standards.
Consent Renewal Documentation
Complete stack emission documentation package for GPCB CTO renewal — all sources tested, all parameters covered, compliance statement included.
GPCB Approved · NABL CC-2480 · Isokinetic Sampling · All Gujarat
Need Stack Emission Testing for Your Gujarat Industry?
NABL-accredited reports · GPCB consent renewal support · Onsite sampling across all Gujarat GIDC zones
— PARAMETERS WE TEST —
Stack Emission Parameters We Cover
8 parameter categories, 40+ emission parameters — comprehensive stack testing for all GPCB-specified sources. View all EHS services →
Particulate Matter (PM)
6 parameters
- Suspended Particulate Matter (SPM)
- PM10 & PM2.5 in Stack
- Total Suspended Particles
- Dust Concentration (mg/Nm³)
- Isokinetic Sampling Method
- GPCB Limit Compliance Check
Gaseous Pollutants
6 parameters
- Sulphur Dioxide (SO₂)
- Oxides of Nitrogen (NOₓ)
- Carbon Monoxide (CO)
- Carbon Dioxide (CO₂)
- Oxygen (O₂) Measurement
- Total Hydrocarbons (THC)
Acid Gases & Halogens
6 parameters
- Hydrochloric Acid (HCl)
- Hydrofluoric Acid (HF)
- Hydrogen Sulphide (H₂S)
- Chlorine (Cl₂)
- Ammonia (NH₃)
- Sulphuric Acid Mist
Organic Compounds & VOCs
6 parameters
- Volatile Organic Compounds (VOCs)
- NMVOC (Non-Methane VOC)
- Benzene, Toluene, Xylene (BTX)
- Formaldehyde & Aldehydes
- Dioxins & Furans (PCDD/F)
- Polycyclic Aromatic Hydrocarbons
Heavy Metals in Stack
6 parameters
- Mercury (Hg) — Vapor Phase
- Lead (Pb) & Cadmium (Cd)
- Arsenic (As) & Chromium (Cr)
- Nickel (Ni) & Zinc (Zn)
- Manganese (Mn)
- Total Heavy Metal Burden
Stack Velocity & Flow
6 parameters
- Flue Gas Velocity (Pitot Tube)
- Volumetric Flow Rate (m³/hr)
- Stack Temperature Measurement
- Stack Gas Moisture Content
- Mass Emission Rate (kg/hr)
- Specific Emission Factor
Source-Specific Testing
6 parameters
- Boiler & Furnace Stack Testing
- DG Set Emission Testing
- Kiln Stack Testing (Ceramic)
- Incinerator Emission Testing
- Scrubber Outlet Monitoring
- ETP Off-Gas Testing
Continuous Emission Monitoring
6 parameters
- CEMS Installation Support
- CEMS Calibration & Validation
- QA/QC for CEMS Data
- Online vs Manual Correlation
- CEMS Performance Testing
- Regulatory CEMS Compliance
— OUR PROCESS —
Stack Emission Testing Process — Step by Step
Our 6-step stack testing methodology follows NABL and GPCB requirements — traceable, documented, and regulatory-submission ready.
Consent Review & Test Plan
Review of your GPCB consent conditions — identifying all emission sources (stacks/vents), parameters to be tested, applicable emission standards, and required test frequency. Customized test plan with sampling port locations and schedule prepared.
Site Safety Assessment
Pre-visit safety assessment of all stack sampling locations — access platform safety, sampling port condition, required PPE, hot work permits, and working-at-height precautions. Ensures safe and complete testing at all emission points.
Onsite Stack Sampling
NABL-trained sampling team mobilized with isokinetic sampling train, flue gas analyzers (electrochemical and non-dispersive infrared), thermal imaging for leak detection, and calibrated pitot tubes. Stack velocity, temperature, and all GPCB-specified parameters sampled per IS/EPA methods.
NABL Laboratory Analysis
Collected filter media, impinger solutions, and grab samples analyzed at our NABL-accredited laboratory (CC-2480). SPM by gravimetry, gaseous pollutants by specific chemical analysis, heavy metals by AAS/ICP-OES. All results with measurement uncertainty.
Compliance Evaluation
Measured emission concentrations compared against your GPCB consent limits. Mass emission rates calculated and compared against applicable CPCB General Standards (GSR 742E) and industry-specific notifications. Non-compliances flagged with corrective action recommendations.
NABL Report & GPCB Submission
Comprehensive stack emission test report in NABL format with all QA/QC documentation, GPCB compliance table, and photographic documentation of sampling setup. Report ready for GPCB submission with consent renewal application.
Industry Applications
Industries We Serve for Stack Emission Testing in Gujarat
From single DG sets to multi-stack chemical complexes — we test all emission sources across Gujarat industries.
Chemical & Dyes
Stack emission testing for chemical reactors, boilers, scrubbers, and ETP off-gases at Ankleshwar, Dahej, Vatva, and Nandesari GIDC. SO₂, HCl, HF, VOCs per GPCB consent.
Know MoreCeramic & Glass
Kiln stack testing for PM, SO₂, NOₓ, HF, and HCl for Morbi ceramic cluster and glass manufacturers. High-temperature isokinetic sampling at kiln exhaust stacks.
Know MorePower Plants & DG Sets
Stack emission testing for captive power plants, boilers, and large DG sets — SPM, SO₂, NOₓ, CO per GPCB consent and CPCB standards. Quarterly monitoring support.
Know MorePharmaceutical & API
Process vent emission testing, solvent VOC monitoring, scrubber outlet testing, and incinerator stack testing for pharmaceutical and API manufacturers in Gujarat.
Know MoreCement & Lime
Kiln and cooler stack testing for SPM, SO₂, NOₓ, and CO₂. Specific emission factor calculation and SEC benchmarking for cement and lime manufacturers.
Know MoreSteel & Foundry
EAF, IF, and cupola furnace stack testing — SPM, heavy metals, dioxins/furans, and CO. Metal fume monitoring and fugitive emission assessment for metal processing.
Know MoreIncinerators
Comprehensive incinerator emission testing — dioxins/furans, heavy metals, HCl, HF, CO, TOC — per CPCB Hazardous Waste Incineration Standards. Regulatory submission ready.
Know MoreTextile & Processing
Boiler stack testing, heat-set oven VOC emissions, dyeing section off-gas monitoring, and ETP air emission testing for textile and apparel manufacturing units.
Know MoreWhy Choose Prism
Gujarat's Trusted
Stack Testing Laboratory.
Prism Calibration Centre combines NABL-accredited stack emission testing with GPCB environmental compliance services and BEE energy auditing — complete EHS support from a single Gujarat-based partner.
Explore Related EHS & Compliance Services
Full EHS compliance — GPCB, BEE, Safety — from one Gujarat-based partner
Energy Audit (BEE)
BEE-accredited energy audits for Designated Consumers.
GPCB Environmental Audit
GPCB consent compliance & environmental monitoring.
Safety Audit
Workplace safety compliance & OSHA standards.
Ambient Air Monitoring
AAQ monitoring for environmental clearances.
Water / ETP / STP Testing
Effluent & wastewater analysis for GPCB limits.
HAZOP Study
Hazard operability study for process safety.
Onsite Emergency Plan
Emergency response planning for industrial facilities.
All Services
View complete calibration & testing catalog.
— Our Clients —
Trusted By Industry Leaders
— CLIENT VOICES —
What Our Stack Testing Clients Say
Prism has been doing our stack emission testing for 5 years. Their team arrives on time with all equipment, completes testing at all 6 stacks in a single day, and delivers NABL reports within 5 days. GPCB has never questioned our monitoring data.
Morbi has strict PM and SO₂ limits for ceramic kilns. Prism's stack testing team understands the specific challenges of testing at high-temperature kiln stacks. Their reports are always in proper NABL format and accepted by GPCB for our CTO renewal.
We run multiple DG sets and a captive boiler. GPCB requires quarterly stack emission testing at all sources. Prism coordinates all testing in a single visit, provides consolidated reports, and tracks our compliance trends over time. Excellent service.
Prism has been doing our stack emission testing for 5 years. Their team arrives on time with all equipment, completes testing at all 6 stacks in a single day, and delivers NABL reports within 5 days. GPCB has never questioned our monitoring data.
Morbi has strict PM and SO₂ limits for ceramic kilns. Prism's stack testing team understands the specific challenges of testing at high-temperature kiln stacks. Their reports are always in proper NABL format and accepted by GPCB for our CTO renewal.
We run multiple DG sets and a captive boiler. GPCB requires quarterly stack emission testing at all sources. Prism coordinates all testing in a single visit, provides consolidated reports, and tracks our compliance trends over time. Excellent service.
Prism has been doing our stack emission testing for 5 years. Their team arrives on time with all equipment, completes testing at all 6 stacks in a single day, and delivers NABL reports within 5 days. GPCB has never questioned our monitoring data.
Morbi has strict PM and SO₂ limits for ceramic kilns. Prism's stack testing team understands the specific challenges of testing at high-temperature kiln stacks. Their reports are always in proper NABL format and accepted by GPCB for our CTO renewal.
We run multiple DG sets and a captive boiler. GPCB requires quarterly stack emission testing at all sources. Prism coordinates all testing in a single visit, provides consolidated reports, and tracks our compliance trends over time. Excellent service.
Get In Touch
Request a Free Stack Testing Quote
Tell us your industry type, number of stacks, and GPCB-specified parameters. Our NABL-accredited team will respond within 2 business hours with a detailed quote and sampling schedule.
— FAQ —
Stack Emission Testing — Frequently Asked Questions
Everything about stack testing, isokinetic sampling, GPCB compliance, and flue gas analysis in Gujarat.
Need Stack Emission Testing in Gujarat?
Call or WhatsApp — NABL-accredited stack testing team responds within the hour. GPCB compliance or CTO renewal — we cover all Gujarat.
Prism Calibration Centre · F 101, Rudraksh Complex 2, Phase 3, GIDC Vatva, Ahmedabad, Gujarat 382445
NABL & GPCB Authorization Disclaimer
Stack emission testing services are provided by NABL-accredited laboratory CC-2480 using methods accredited under ISO/IEC 17025. All stack emission test reports are prepared in compliance with GPCB requirements under the Air (Prevention and Control of Pollution) Act 1981. Reports are valid for GPCB consent renewal, Annual Environmental Statement, and regulatory compliance submissions. Prism Calibration Centre also holds GPCB environmental laboratory approval and BEE authorization for energy audits.