Poondi Lake is the reservoir across Kotralai River in Tiruvallur state of Tamil Nadu. It goes about as the critical water hotspot for Chennai city which is 60 km away. Poondi Reservoir was developed in 1944 over the Kosathalaiyar River or Kotralai River in Thiruvallur locale with a limit of 2573 Mcft and put in administration for capturing and putting away Kosathalaiyar River water. Surplus dilute streams the waterway which is again captured by Tamaraipakkam Anicut and occupied to Sholavaram Lake and Puzhal lake.
This supply was developed at the expense of Rupees 65 lakhs. Satyamurti who is recollected today as the political tutor of Kumaraswami Kamaraj, who was the Chief Minister of the State. The first perplexing of Oondreswarar Temple is accepted to have been worked by Cholas, while the present brick work structure was worked amid the16th century. The temple was moved to the present area in 1942 to facilitate the development of the reservoir. The supply has a garden is a prominent outing spot in the locale. The development of a lined channel from Poondi to Tamaraipakkam for a length of 15 km. to pass on water from Poondi to Tamaraipakkam was finished in 1972 to diminish the transmission misfortune. The water system privileges of Sholavaram lake and Redhills lake were procured in 1962 and the whole stockpiling was made accessible for the City supply.