Nagapattinam District Profile

• Nagapattinam district is bounded in the North by Karaikal in Pondicherry state and Thiruvarur district, in the west by Thiruvarur districts and in the south and east by Bay of Bengal.
• The District lies between 10º 15’ 00”N to 10º 54' 00”N Latitude, 79º 39' 00”E to 79º 55' 00”E Longitude and has an aerial extent of 1205 sq.km.

Physiography and Drainage

The entire Nagapattinam district is a plain terrain with the slope less than 1%. The topographical slope is towards east and southeast.

• The entire Nagapattinam district is a plain terrain with the slope less than 1%. The topographical slope is towards east and southeast.
• The total length of the coast in the east and south is 135km.
• The district area falls under two river basin namely Vennar sub basin and New Delta sub basin.
• The district is drained by river like Arasalar, Tirumalai Rajanaru, Vettararu, Keduvaiaru, Pandavaiaru, Vedaranyam canal and Harichandranadi.
• The district forms the delta part of river Cauvery.

Geology:

Rainfall:

The average annual rainfall and the 5 years rainfall collected from IMD, Chennai is as follows:

Hydrogeology:

Ground Water Level:

The Ground Water levels from the 26 number of observation wells of TWAD have been analysed for Post-Monsoon and Pre-Monsoon. 5 years average Ground water level in m Below Ground Level for pre and post monsoon is as follows:

5 years average Groundwater level in m Below Ground Level for pre and post monsoon is as follows:

Sustainability:

With a view to enhance the Sustainability of the drinking water sources, recharge structures are being implemented by TWAD Board under various State and Central Government assistances. The Recharge Structures implemented so far in district is as under.

The Recharge Structures implemented so far is as under.

Groundwater Potential as on March 2011 (as per CGWB):

Categorization of Firkas:

The status of Categorization of Firkas as of March 2017 for the District in is shown below.

Water supply status as on 1.4.2021

Rural Habitations

Total No. of Rural Habitations: 2054

Urban Towns ( Water Supply Status - 1.8.2019)