With India's groundwater resources under severe stress — 16% of assessment units are in the "over-exploited" category according to CGWB data — the Central Ground Water Authority (CGWA) has significantly tightened regulations on industrial groundwater extraction. For industries planning expansion, understanding groundwater compliance is now as critical as air and water consent management.
📌 Key regulation: Any industry extracting more than 10 cubic metres/day of groundwater requires a No Objection Certificate (NOC) from CGWA. The NOC process now includes mandatory aquifer mapping and hydrogeological assessment.
Who Needs a CGWA NOC?
CGWA NOC is required for:
- Industries extracting groundwater exceeding 10 m³/day
- Infrastructure projects (airports, metro, large buildings) with significant dewatering
- Mining operations with groundwater intrusion
- Industries in "Over-exploited" or "Critical" assessment units — regardless of quantity extracted
- New borewells and deepening of existing borewells
The NOC Application Process
Applications are submitted online through CGWA's portal. Key requirements include:
- Hydrogeological report prepared by a certified hydrogeologist
- Aquifer map showing depth to water table (seasonal)
- Details of existing water sources and alternatives explored
- Water conservation and artificial recharge plan
- ETP/STP details showing treated water reuse plan
- Monthly groundwater extraction data for existing borewells
Assessment Unit Categories and Their Impact
CGWB classifies assessment units (sub-district level) into:
- Safe: Normal extraction permitted with NOC
- Semi-Critical: NOC required with conservation plan
- Critical: Restricted permissions; prefer surface water alternatives
- Over-exploited: No new permissions for non-domestic extraction in most cases
- Saline: Special treatment requirements before use
Groundwater Impact Assessment Components
A comprehensive Groundwater Impact Assessment (GIA) should include:
- Pre-monsoon and post-monsoon water table depth mapping
- Aquifer characterisation (permeability, transmissivity, storage coefficient)
- Groundwater flow direction and contamination risk assessment
- Drawdown modelling for proposed extraction scenarios
- Impact on nearby community wells and agricultural borewells
- Artificial recharge structure design (recharge pits, percolation tanks)
💡 BEC Tip: Install piezometers (water level monitoring wells) at your facility before making the NOC application. Monthly water level data for at least 6 months significantly strengthens your hydrogeological report and improves NOC approval chances.
Conclusion
Groundwater is no longer a "free" resource for industries in India. The combination of CGWA tightening, state-level restrictions, and community pressure means that industries must develop water-efficient processes, maximise rainwater harvesting and treated water recycling, and engage proactively with groundwater authorities to secure long-term water security.
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