Numthaja Co., Ltd.
"Environmental Excellence Driven by Science and Strategy"
Numthaja is a Category (A) certified and specialized environmental consultancy in Saudi Arabia, fully licensed by the National Center for Environmental Compliance (NCEC) and strictly aligned with Saudi Environmental Law and its regulations.
Environmental Consultation Services
Integrated environmental support for industrial, infrastructure, healthcare, and development projects.
Environmental Impact Assessment
Technical studies to identify potential environmental impacts, assess significance, and recommend practical mitigation and management measures.
Environmental Management Plans
Clear and practical plans that organize environmental responsibilities, controls, monitoring actions, and operational procedures during construction or operation.
Environmental Compliance & Records
Professional preparation and organization of environmental records to improve compliance, documentation quality, and regulatory readiness.
Environmental Monitoring & Measurements
Measurement and monitoring support through qualified laboratories, with technical coordination that links results to studies, records, and environmental deliverables.
Sustainability & ESG Services
Advisory support to strengthen sustainability practices, organize ESG priorities, and improve environmental and institutional performance.
Carbon Footprint Calculation
Carbon footprint estimation and calculation services that help organizations understand emissions, identify major sources, and support sustainability planning.
Environmental Modelling Services
Advanced numerical modelling to understand, predict, and manage environmental impacts.
Noise Modelling
Predictive environmental noise mapping using LimAQ and QGIS to assess industrial, traffic, and mechanical noise and support mitigation planning.
Air Dispersion Modelling
Analysis of pollutant dispersion from different sources to support air quality assessment, environmental compliance, and interpretation of technical scenarios.
Weather & Climate Modelling
Weather and climate simulation using WRF, including downscaling to 1 km, and long-term climate analysis based on ERA5 reanalysis data.
GIS Studies
Spatial analysis, mapping, and environmental data integration to produce visual and analytical outputs that support planning and technical decisions.
Hydrology & Hydrogeology Modelling
Analysis of surface water and groundwater behavior to support environmental, planning, and technical studies related to site water conditions.
Radioactive Pollution Modelling
A service available based on the scope of the case or project, with the required technical support defined through direct consultation and case review.
Oil Spill Modelling
A service available depending on the nature of the project or case, supporting preliminary assessment of spill movement and impact range through direct consultation.
Licenses and Certifications
Credentials that demonstrate regulatory recognition and quality assurance.
- Environmental License from the National Center for Environmental Compliance (NCEC).
- Qualification License from the Royal Commission for Jubail and Yanbu.
- ISO 9001:2015 Quality Management System certification.
- Downtown Saudi Arabia qualification.
Key Clients & Sectors
Experience across a wide spectrum of industrial and service sectors.
Numthaja Co. Ltd. has a strong track record of serving clients such as crushers and quarries, ready-mix plants, industrial manufacturers, healthcare and infrastructure projects, marine facilities, waste management and recycling operations, and more.
Why this matters
Working with diverse sectors enables us to understand unique regulatory and operational constraints and to design solutions that are realistic, practical, and tailored to each client’s context.
Volcanic Ash Cloud Modelling
"Data Assimilation Enhances WRF-Chem Performance in Modeling Volcanic Ash Clouds from Hunga Tonga–Hunga Ha'apai Eruption", Journal of Meteorological Research, 2024 (Springer).
Dust Storm Simulation
"The role of observation nudging in high-resolution simulations of the 2016 Tunisian dust storm event", Euro-Mediterranean Journal for Environmental Integration, 2025 (Springer).
Applied Environmental Science
Our research engagement bridges academic innovation and real-world applications, strengthening the scientific basis of our consulting and modelling services.
Contact Information
Get in touch to discuss permitting, modelling, or full environmental management support.
Reach Us
Phone:
+966 55 001 0247
Email:
contact@numthaja.com
Website:
www.numthaja.com
Work With Numthaja
At Numthaja Co., Ltd., we turn complexity into clarity — delivering environmental solutions that are practical, regulatory-compliant, and future-ready.