A Meteosim solution
OnaChem
Modular software for air quality control and atmospheric risk management
With OnaChem, the chemical industry gains a robust, intuitive platform designed to transform every piece of data into concrete action.
OnaChem is the result of close collaboration with chemical and petrochemical companies seeking greater control, agility, and safety in managing air quality and atmospheric risks.
A modular and collaborative solution that allows you to integrate data, analyze it in depth, simplify it into actionable insights, and decide with technical accuracy, all from a single environment prepared for the present and future of the industry.
INTEGRATE
real-time data, forecasts, and alerts in a single dashboard.
ANALYZE
environmental and chemical events with validated models and guided workflows.
SIMPLIFY
technical complexity through clear visualizations, guided workflows, and automatic reports.
DECIDE
with confidence, supported by technical and scientific knowledge.
Meteosim in numbers
0+
of experience
0
0%
retention rate
Different modules for comprehensive air quality and chemical risk management
OnaChem is structured into various modules that allow chemical facilities to control, analyze, and act in any situation: from real-time monitoring to emergency management and contamination episode investigation. Each module works independently, but together they offer a comprehensive solution to improve safety, efficiency, and regulatory compliance in the chemical industry.
OVERVIEW
Real-time global view

The Overview module offers a customizable dashboard that integrates sensor data, alerts, and atmospheric forecasts into a single environment.
Allows each user to visualize the most relevant information for their role and anticipate potential environmental or operational incidents.
- Real-time monitoring of emissions and air quality.
- Automatic alerts for threshold exceedance and active events.
- Meteorological and air quality forecasts by area.
- Clear visualization on maps and interactive charts.
REACT
Quick response to chemical emergencies

With React, industrial safety teams can manage chemical emergencies in a collaborative and structured way. The system guides users step-by-step through emission incident analysis, integrating advanced dispersion and toxicity models for faster and more accurate response.
- Guided workflows for managing chemical incidents.
- Automatic simulations with tailored dispersion models.
- Concentration and toxicity maps (AEGL, ERPG) for risk assessment.
- Automatic and validated reports for auditors and authorities.
INSPECT
Pollution event investigation

Inspect allows environmental management teams to investigate the origin and responsibility for contamination episodes (exceedances of thresholds, odor complaints, emissions, etc.). With a collaborative workflow and validated models, it helps identify causes and document each case.
- Emission and immission analysis with back trajectories and dispersion.
- Automatic integration of sensor data and detected episodes.
- Simulations with AERMOD, CALPUFF and HYSPLIT models for different scales.
- Customizable and validated reports, ready to share with your team and regulators.
FAQ
What is ONACHEM and how can it help me?
ONACHEM is a solution developed by METEOSIM to enhance the monitoring, planning, and analysis of environmental events caused by weather-sensitive or air quality–sensitive activities. Its advanced features allow you to anticipate adverse meteorological conditions, adjust operations with greater precision, and perform detailed analysis of past events, enabling more efficient and proactive environmental management.
Additionally, ONACHEM is specifically designed to support chemical emergency management in industrial facilities, integrating real-time data to generate actionable insights for faster decision-making, minimizing risks, and improving coordination between technical and safety teams.
How can ONACHEM adapt to my site’s needs?
ONACHEM has been designed with high flexibility and scalability, so it can be configured to meet the specific requirements of each site—its processes, environmental risks, and operational goals.
METEOSIM’s team combines over 20 years of experience in the chemical sector with expertise in software design and environmental consulting, ensuring customized configurations that integrate smoothly with existing systems and provide value from day one.
What ROI does ONACHEM offer?
Implementing ONACHEM can generate tangible short- and medium-term benefits, including:
- Optimization of critical activity planning by anticipating adverse environmental conditions.
- Reduction of operational costs through emission mitigation, energy savings, and efficient resource use.
- Lower operational risks (unplanned downtime, technical shut-down, deviations in critical processes).
- Streamlined reporting, cutting time spent on routine documentation by up to 20%.
- SaaS model eliminates fixed infrastructure/licensing costs, ensuring 24/7 availability.
What types of sensors can be integrated into ONACHEM?
ONACHEM supports integration with a wide range of sensors, including:
- Meteorological
- Air quality
- Water
- Noise
- Industrial process sensors (Data Historian)
This enables a holistic understanding of environmental impacts at the site.
Can I integrate my own sensors into ONACHEM?
Yes. Our experts can integrate your plant’s existing automatic sensor networks via standard protocols such as API-REST.
Data collection becomes automated and can be visualized in real time on the dashboard, improving predictive model calibration and overall reliability.
How reliable are ONACHEM’s modeling tools?
ONACHEM uses advanced algorithms and real-time data to deliver accurate and traceable predictions. Numerical models are validated and calibrated regularly, following international technical guidelines (WMO, US-EPA, FAIRMODE, etc.).
We also collaborate with leading meteorological and environmental institutions, ensuring transparency and trust in our solutions. Validation results are shared with clients.
Where is data stored? Is it secure?
Data is hosted in a Tier 3 data center with ISO 27001 certification, ensuring the highest standards of security and availability.
METEOSIM applies:
- Regularly audited encryption and security protocols.
- Multi-factor authentication (MFA) and identity access management (IAM).
- A Zero Trust security model.
- Continuous monitoring, vulnerability analysis, and periodic audits.
What kind of support does MeteoSim provide for OnaChem?
ONACHEM includes specialized technical support as part of the license or subscription, ensuring your organization receives continuous assistance:
- Personalized guidance during setup and implementation.
- Ongoing support for incidents, technical queries, and integration needs.
- Regular software updates with functional and security improvements.
- User training, including learning materials and hands-on sessions.
- Direct communication channels (email and ticketing system) with guaranteed response times.


