An Environmental Impact Assessment (EIA) is the mandatory pre-construction study that demonstrates how a new or expanded project will manage its environmental impacts across air, water, soil, noise, biodiversity, and community health. Under NCEC and RCER-2025, no Category A or B facility can begin construction, commissioning, or operation without an approved EIA on file. Skipping or shortcutting the EIA is one of the fastest paths to project shutdown and revocation of related municipal and industrial licenses.
Baseline period (Cat. A)
12 months
Approval timeline
90–180 days
Validity
3 years (renewable)
Your key obligations
- Determine EIA category (Full EIA, Initial EIA, or Exempt) via NCEC screening
- Conduct a 12-month baseline environmental monitoring campaign before submission (Cat. A)
- Prepare an EIA report by an NCEC-licensed consultant covering all impact pathways
- Conduct meaningful public consultation and document community feedback
- Submit Environmental Management Plan (EMP) and Environmental Monitoring Plan (EMOP)
- Implement and monitor mitigation measures throughout construction and operation
When EIA Is Mandatory
Full EIA is mandatory for refineries, petrochemicals, cement, power generation above 25 MW, large desalination, hazardous waste facilities, mining, and major infrastructure. Initial EIA covers medium-scale industrial, food processing, large logistics hubs, and tourism developments above defined thresholds. Below these thresholds a short Environmental Screening Form may suffice.
Baseline Studies & Monitoring
Cat. A EIAs require 12 months of ambient air quality data (PM10, PM2.5, SO2, NO2, O3, CO), noise mapping, water quality sampling, ecological surveys, and meteorological data. OzoneCo operates mobile and fixed monitoring stations across KSA specifically for EIA baseline campaigns.
Approval & Conditions
NCEC typically issues EIA approval with binding conditions: emission limits, CEMS installation deadlines, mitigation commitments, and follow-up auditing. These conditions become enforceable license terms once construction begins.
Frequently asked questions
Can construction start before EIA approval?＋
No. Any site preparation, foundation works, or commissioning before EIA approval is a Class 1 violation and can trigger immediate stop-work orders.