The Government of Tamilnadu approved the categorization of the Panchayat Union blocks in Tamilnadu as Over- Exploited, Critical, 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 as on 2011
11. G.O.(Ms) No. 257 Categorization of Firka as on 2013  

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