Schedule a meetingWhatsApp
07 / WATER

Hydrogeology Services

A groundwater NOC is often the last approval a mine is still waiting on — and the one most often applied for too late, after excavation has already reached the water table.

CGWA NOC · EIA Notification 2006 · Water balance study

What this covers

  • Groundwater resource assessment for new and expanding leases
  • Central Ground Water Authority (CGWA) No-Objection Certificate applications
  • Water balance studies for environmental clearance and mine closure submissions
  • Dewatering plans for pits approaching or below the water table
  • Aquifer and recharge impact assessment for surrounding land use
  • Monitoring well design and groundwater quality baseline data

Why it matters

A mine can clear every other approval and still stall on water. CGWA treats groundwater abstraction as a separate consent from environmental clearance — it's commonly the approval mine owners realise they need only after excavation reaches the water table.

How it works

From assessment to a granted NOC

01

Assess

Existing groundwater data, aquifer type, and abstraction requirement reviewed.

02

Field study

Water table levels, quality, and recharge conditions measured on site.

03

Model

Water balance and dewatering requirement calculated against the mine plan.

04

Submit

CGWA NOC application filed and carried through to approval.

Common questions

Hydrogeology FAQs

When does a mine actually need a CGWA NOC?

Whenever the mine involves groundwater abstraction or dewatering below the water table — this is a separate consent from environmental clearance and is often needed even when EC has already been granted.

How is a water balance study different from an environmental clearance study?

A water balance study specifically quantifies groundwater inflow, abstraction, and recharge for the mine's dewatering and water-use requirement. An EC study, by contrast, covers water only as one part of a much broader environmental assessment.

What happens if excavation reaches the water table before the NOC is in place?

Work on that section typically has to pause until the NOC is granted, which is why this assessment is best done alongside the mining plan rather than after dewatering becomes urgent.

Does this affect the mine closure plan too?

Yes — groundwater recovery and any pit-lake formation after mining ends is assessed as part of the water balance work and carried into the closure plan's monitoring commitments.

Start with the critical path

Bring your next mining decision to the table.

Whether you're preparing a plan, renewing a lease, or resolving a clearance issue, tell us what is holding the project up. We'll help define the next practical step.

Schedule a meeting →