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
Full-service environmental management for industrial, infrastructure, and development projects.
Environmental Impact Assessments (EIAs)
Comprehensive EIAs covering screening and scoping, baseline studies, impact assessment, mitigation planning, and decision support for permitting authorities.
CEMP & OEMP
Construction & Operational Environmental Management Plans aligned with Saudi Environmental Law, including clear roles, monitoring plans, and performance indicators for contractors and operators.
Environmental Records & Compliance
Creation and maintenance of environmental records, client follow-up, and coordination with regulators to ensure continuous compliance.
Audits & Site Rehabilitation
Environmental audits to evaluate performance, identify non-compliance, and develop practical rehabilitation strategies for impacted sites.
Air Emission Control Strategies
Technical studies and planning to reduce air pollution from stationary and mobile sources, backed by regulatory standards and best practices.
Integrated Environmental Management
Integrated environmental management frameworks for large-scale developments, covering permitting, monitoring, and long-term sustainability.
Environmental Modelling Services
Advanced numerical modelling to understand, predict, and manage environmental impacts.
Air Dispersion Modelling
Predicts the atmospheric spread of pollutants from industrial stacks and other sources, supporting urban planning and regulatory compliance for air quality.
Radioactive Pollution Modelling
Assesses the dispersion and impacts of radioactive materials to support nuclear safety, emergency response, and environmental protection.
Weather & Climate Modelling
Simulates atmospheric conditions to study weather patterns and climate change impacts, including temperature, precipitation, and wind behaviour.
Oil Spill Modelling
Forecasts oil spill trajectories in marine and coastal environments to guide response, safeguard ecosystems, and optimise cleanup operations.
Hydrology & Hydrogeology
Traces water flow on the surface and underground to support water resource management, flood and drought forecasting, and environmental protection.
GIS & AI Applications
Spatial analysis, mapping, and AI-driven modelling for climate prediction, pollution control, resource management, and ecological forecasting.
Noise Modelling
Predictive environmental noise mapping using LimA software to assess industrial, traffic, and mechanical noise, evaluate compliance with national standards, and design effective mitigation and control measures.
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.
Numthaja-Supported Scientific Research
Contributing to peer-reviewed research in atmospheric modelling, weather forecasting, and air quality.
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.