The Supreme Court today asked all the states to clarify whether they would implement Centre's master plan for artificial recharge of ground water in India. A bench comprising Chief Justice J S Khehar and Justice D Y Chandrachud asked the state governments to apprise it by Friday. The bench noted that several states like Assam, Goa, Jammu and Kashmir and Haryana have not yet filed affidavits in this regard. The apex court had earlier asked the states to specify the status of implementation of the master plan of Central Ground Water Authority on ground water harvesting, terming it an important issue. The court is hearing a petition which raised concern over the depleting ground water level across the country.