Case Study

Environmental monitoring of air quality and noise at Subic Bay international airport

Subic Bay Metropolitan Authority

Sector: Ports & Airports

Need

The Subic Bay Metropolitan Authority (SBMA) manages the Subic Bay International Airport (SBIA), one of the main airports in the Philippines. It was conceived as a key logistics and international air transport hub for corporate and business aviation.

In line with its sustainability goals and in compliance with the Clean Air Act of 1999, the SBMA launched an ambitious environmental initiative aimed at monitoring and managing air quality and noise levels in airport operations.
This project reinforces SBMA’s commitment to a cleaner, safer and more sustainable environment, setting a benchmark for the region.

Airport operations — aircraft movements, ground traffic, machinery and logistics activities — generate emissions and noise that directly affect environmental quality and public perception.

SBIA needed reliable, real-time data to identify pollution sources, assess their impact and apply effective corrective measures, all in line with the highest international standards.

Thanks to the deployed monitoring network, Subic Bay International Airport now obtains accurate, real-time data that enables it to anticipate and mitigate the environmental impact of its operations.

Thanks to the monitoring network deployed, Subic Bay Airport obtains accurate, real-time data that enables it to anticipate and mitigate the environmental impact of its operations.

Estación Kunak AIR Pro monitorizando la calidad del aire y el ruido en el Aeropuerto Internacional de Subic Bay (Filipinas) - Kunak

Solution

To achieve this, the airport implemented a comprehensive air quality and noise monitoring network by installing several Kunak AIR Pro sensors at strategic points within the facilities (buildings 8050 and 8015).

Data are transmitted in real time via the Kunak AIR Cloud web platform, allowing users to visualise, analyse and generate automatic reports from anywhere. This enables proactive environmental management and evidence-based decision-making to optimise airport operations.

The Subic Bay project demonstrates how Kunak AIR Pro technology can transform environmental management at modern airports. By integrating continuous air and noise monitoring with advanced analysis and remote-control tools, SBMA has taken a decisive step towards more sustainable, transparent and efficient operations.

This experience has become an international reference for other airports and port authorities seeking to reduce emissions, improve environmental performance, and move towards cleaner and more responsible aviation.

Results

The new system has provided SBIA with high-resolution, real-time information on air quality, ambient noise and meteorological conditions throughout the airport area.

Thanks to integrated alarms and configurable alerts, technical staff can respond immediately to any threshold exceedance, reducing response times and improving operational safety.

The advanced analytics of Kunak AIR Cloud offer a detailed view of pollutant behaviour and sound levels, helping the airport authority make informed decisions to control emissions and mitigate the environmental impact of its activities.

This project marks a milestone in environmental management for Philippine airports, reinforcing SBMA’s leadership in sustainability and consolidating Subic Bay International Airport as a model of an intelligent, environmentally responsible airport.

Benefits

Compliance with the Clean Air Act and international environmental standards.
Continuous monitoring of gases, particles and noise in real time.
Early alerts and advanced analytics for more efficient environmental management.
Accurate, traceable data, comparable with reference stations.
Transparency and environmental commitment with the community and authorities.
Scalable, modular infrastructure ready for future expansion.

Project details

Customer: Subic Bay Metropolitan Authority

User: Subic Bay international airport

Location: Subic Bay international airport, Philippines

Sector: Ports & Airports

Year: 2025

Parameters:

Each monitoring station is equipped with:

Gas sensors: NO₂, O₃, SO₂, CO₂ and VOCs.
Particle measurement: PM₁, PM_2.5 and PM₁₀.
Precision sound level meters for accurate noise measurement.
Ultrasonic anemometers to record wind speed and direction.
Meteorological variables: temperature, relative humidity and atmospheric pressure.

Solutions

AIR ProProfessional air quality monitoring station
AIR Pro
The most accurate air quality monitoring station

SENSOR-BASED | BEST AVAILABLE ACCURACY

Benefits
- Multi-pollutant
- Smart cartridge system
- Fully autonomous
- Real-time data
- Proven accuracy
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AIR CloudAir quality software
AIR Cloud
Multipurpose air quality software for professionals

REAL-TIME DATA | ALWAYS UPDATED

Benefits
- Secure and condifential
- Air quality reporting
- Advanced data analysis and visualisation
- Reliable data guaranteed
- Data sharing and integration
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Nitrogen dioxideReliable real-time data on NO₂
Nitrogen dioxide
Reliable information about nitrogen dioxide

GASPLUG TECHNOLOGY | PATENTED DESIGN

Specs
- Electrochemical
- R² >0.85
- Range: 0-12,000 ppb (Type A) | 0-500 ppm (Type B)
- Resolution: 1 ppb (Type A) | 0.01 ppm (Type B)
- 24 months of operating life
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OzoneReliable real-time data on O₃
Ozone
Reliable information about ozone

GASPLUG TECHNOLOGY | PATENTED DESIGN

Specs
- Electrochemical
- R² >0.9
- Range: 0-2,000 ppb
- Resolution: 1 ppb
- 24 months of operating life
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Sulphur dioxideReliable real-time data on SO₂
Sulphur dioxide
Reliable information about sulphur dioxide

GASPLUG TECHNOLOGY | PATENTED DESIGN

Specs
- Electrochemical
- R² >0.7
- Range: 0-10,000 ppb
- Resolution: 1 ppb
- 24 months of operating life
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Carbon dioxideReliable real-time data on CO₂
Carbon dioxide
Reliable information about carbon dioxide

GASPLUG TECHNOLOGY | PATENTED DESIGN

Specs
- NDIR
- Typical accuracy (MAE): ±30 ppm
- Range: 0-5,000 ppm
- Resolution: 1 ppm
- > 7 years of operating life
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Volatile organic compoundsReliable real-time data on VOCs
Volatile organic compounds
Reliable information about volatile organic compounds

GASPLUG TECHNOLOGY | PATENTED DESIGN

Specs
- Photoionization detector
- R² >0.99
- Range: 0-3,000 ppb (Type A) | 0-40 ppm (Type B)
- Resolution: 1 ppb (Type A) | 0.01 ppm (Type B)
- 10,000 hours of operating life
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Particulate MatterReliable real-time data on suspended particles
Particulate Matter
Reliable information about particulate matter

GASPLUG TECHNOLOGY | PATENTED DESIGN

Specs
- Optical particle counter
- Up to R² >0.9
- Range: 0-1,000 | 0-2,000 | 0-10,000 ppb
- Resolution: 1 μg/m³
- 24 months of operating life
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