of Tamil Nadu. Sarah Tucker College was the first college for women in south India. The Indian Institute of Geomagnetism (IIG) operates a regional unit, the Equatorial Geophysical Research Laboratory, conducting research in geomagnetism and atmospheric and space sciences. The city has a District Science Centre (a satellite unit of Visvesvaraya Industrial and Technological Museum, Bangalore) with permanent exhibitions, science shows, interactive self-guided tours, a mini-planetarium and sky observation. Tirunelveli and the district have a high rate of child labour. The drop in female school attendance between ages 15 and 19 is almost four times greater than that in the rest of Tamil Nadu. Utilities Electric service to Tirunelveli is regulated and distributed by the Tamil Nadu Electricity Board (TNEB). The city is headquarters for the Tirunelveli region of the four-division TNEB and, with its suburbs, forms the Tirunelveli Electricity Distribution Circle. A chief distribution engineer is stationed at regional headquarters. Water supply is provided by the Tirunelveli City Corporation from the Tamirabarani River, throughout the city. About 100 metric tonnes of solid waste are collected from the city daily in door-to-door collection; source segregation and disposal is performed by the sanitary department of the Tirunelveli Municipal Corporation. The underground drainage system was constituted in 1998, covering 22 percent of the corporation area. The remaining system for disposal of sewage is through septic tanks and public conveniences. The corporation maintains a total of of stormwater drains, 27 percent of the total road length. The clinics operated by the corporation provide primary health care to the urban poor through family-welfare and immunisation programs. In addition, there are private hospitals and clinics providing health care to citizens. Tirunelveli is part of the Tirunelveli Telecom District of Bharat Sanchar Nigam Limited (BSNL), India's state-owned telecom and internet-services provider. Both Global System for Mobile Communications (GSM) and Code division multiple access (CDMA) mobile services are available. In addition to telecommunications, BSNL also provides broadband internet service. Tirunelveli is one of a few cities in India where BSNL's Caller Line Identification (CLI)-based internet service, Netone, is available. The city has a Passport Seva Kendra, a public-private-sector collaboration, which accepts passport applications from the Tirunelveli region for the passport office in Madurai. Notes References . . . . . External links Tirunelveli City-Municipal Corporation Cities and towns in Tirunelveli district