The Police Service of Greater Chennai, a division of the police in Tamil Nadu, is the agency law enforcement in the city. Police of the city is headed by a police commissioner, and the administrative responsibility of the Department of Tamil Nadu. The department consists of 36 sub-divisions with a total of 121 police officers, 15 of whom are certified ISO 9001:2000. The city traffic is managed by the Traffic Police the city of Chennai (CCTP). The Metropolitan suburbs are controlled by the Metropolitan Police in Chennai, residential areas and outdoor are closely monitored by the police and Kanchipuram Thiruvallur departments. Ripon Building, which houses the Corporation of Chennai, was completed in 1913. It is named after the former viceroy Lord Ripon. The Corporation of Chennai and towns in the suburbs of providing civic services. Garbage, in most areas is provided by JBM Fanalca Environmental Management, a private company, and by the Corporation of Chennai in other areas. Water supply and sewage treatment are handled by the Metropolitan Water Supply and Sewage Board, popularly known as Metro Water. Electricity is provided by the Tamil Nadu Electricity Board. The city's telephone service is provided by six mobile phone companies and land four companies, which also provide broadband Internet access, as well as Sify and Hathway.

Historically, Chennai relied on the annual monsoon rains to replenish water reservoirs, because there are no large rivers flow through the area. Quit to grow in population, the city has faced water shortages, soil and its water level have been exhausted. An earlier draft Veeranam lake has failed to solve the problems of water in the city, but New Veeranam project, which became operational in September 2004, has significantly reduced dependence on distant sources. In recent years, heavy monsoon rains and consistent and rainwater harvesting (RWH) Chennai, at its Metrowater Anna Nagar Rain Centre have greatly reduced water shortages. In addition, new projects such as Telugu Ganga which bring water from the surplus water of rivers like the Krishna river in Andhra Pradesh have eased water shortages. The city is the construction of desalination plants seawater to increase water supply. Parry's Corner, one of the oldest business districts in ChennaiChennai has a diversified economy and rooted in the automobile, software services, equipment manufacturing, health care and financial services. In 2000, the city was the total foreign income. 12488.83 crores,an increase of 10.9% of total income of Tamil Nadu. In 2001, the total working population in Chennai is about 1.5 million, which was 31.79% of its population. According to the 1991 census, most of the city workforce has been involved in trade (25.65%), manufacturing (23.52%), transportation (10.72%), construction (6, 3%) and other services (31.8%). Chennai metropolitan area accounts for over 75% of the sales tax revenue in the state.

Tidel Park is the world's largest software parks in India city is a hub of electronics manufacturing, where multinational corporations like Dell, Motorola, Nokia, Samsung, Foxconn and Flextronics have set up electronic equipment and factories Manufacturing, mainly in the Special Economic Zone (SEZ) Sriperumbudur. Many software and services companies have development centres in Chennai, which contributed 14% of total India, software exports Rs.144214 crores during 2006-07, making it the second most GRAND software exporter in the country, behind Bangalore. Prominent financial institutions, including the World Bank, have back-office operations in the city. Chennai is the home of three major domestic commercial banks at the state level and many cooperative banks, finance and insurance companies. Certain of India known health institutions such as Apollo Hospitals (the largest supplier of private health care in Asia), Sankara Nethralaya and Sri Ramachandra Medical Centre are based in the city, making it one Favorites destinations of tourists from the medical world. Giant telecommunications Ericsson and Alcatel-Lucent, pharmaceutical giant Pfizer and chemicals giant Dow Chemicals have facilities for research and development in Chennai. TICEL Bio-technology park and the Golden Jubilee of the bio-tech park at Siruseri house biotechnology companies and laboratories. Chennai has a fully electronic stock exchange called the Madras Stock Exchange.