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Ariyalur district `has been carved out of Perambalur district and is bounded by the districts of Cuddalore in the north and north-east, Nagapattinam in the east, Thanjavur in the south and south-east, Tiruchirapalli in the south-west and Perambalur in the west.

The district lies between 10°53’00’’ to 11°26’00’’ Northern latitude and 78°56’00’’ to 79°31’00’’ Eastern longitude and has an areal extent of 1,944 sq.km.

• There are 6 Blocks, 201 Villages and 1574 Habitations in the District.

 Physiography and Drainage:

• Ariyalur district forms parts of Vellar and Cauvery Rivers basins.

• Cauvery River fringes the southern boundary of the district. River Vellar drains in the northern part and River Marudaiyar flowing in the south confluences with R.Coleroon as a tributary.


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

Acutal Rainfall in mmNormal Rainfall in mm
Aquifer parametersAlluvium SedimentaryHard Rock
Well yield in lpm300-950300-55080-210
Transmissivity (T) m 2/day225-150090-19035-130
Permeability (K) m/day20-5015-305-20
Depth of water level3m to 15m
 Ground Water Level:

The Ground Water levels from the 27 number of observation wells of TWAD have been analysed for Post-Monsoon and Pre-Monsoon. Since 1991, average Ground water level in m Below Ground Level for pre and post monsoon is as follows:


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.

Recharge Structures
Check Dam Percolation Pond Recharge Pit Recharge Trench Others Ooranies Defunct Bore well Recharge Recharge Shaft Roof top RWH Hydro Fracturing Total
89 3 9 10 111
 WGroundwater Potential as on March 2011 (as per CGWB)
Net Groundwater Availability (in MCM) 314.97
Existing Gross Groundwater draft for all users (in MCM) 161.52
Stage of Groundwater development (in %) 51 %
Categorization of District Safe
 Categorization of Firkas:

The status of Categorization of Firkas as of March 2013 for the District in is shown below.

Categorisation based on Extraction (as on March 2013)) No. of Firkas Firkas
Over Exploited (>100%) -
Critical (90%-100%) 0
Semi Critical (70%-90%) 2 Sendurai,suthamalli
Safe (<70%) 13 Andimadam, Ariyalur, Elakurichi,
Jayankondam, Keelapalur, Kundaveli,
Kuvagam, Mathur, Nanmangalam,
Ponparappi, T. Palur, Thirumanur,
Others (Poor& Saline) -
Total 15
 Water supply status as on 1.4.2017
Rural Habitations
Total No. of Rural Habitations:1573
Partially covered0 (10-39 lpcd )
Fully covered1573 (40 lpcd and above)
 Urban Towns (Water supply status - Sep 2016)
S.NOName of Towns Population Present water supply level LPCD
1Jeyakondam 33945 80
2Ariyalur 28902 80
Town Panchayats
1Udayarpalayam 12688 68
2Varadarayanpettai 8259 67
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