The Government of Tamilnadu approved the categorization of the Panchayat Union blocks in Tamilnadu as Over- Exploited, Critical, and Semi critical and safe blocks for ground water development as on January 2009.

1. G.O.MS.No. 52 2. Categorization Annexture - I
3. Annexure II 4. G.O.1766
5. G.O. 213 6. G.O. 281
7. G.O. 127 8. Stage and  categorization as on March 2009
9. CONSOLIDATED GUIDELINES 2011  
10. G.O.(Ms) No. 113 Categorization of Firka  

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