after the 'right to live in a pollution-free environment' mentioned above was written into the 1980 Constitution, however, water pollution is still a concern. This is mostly due to point-source discharges of untreated domestic and industrial wastewaters. In the early 1990s, domestic and industrial wastewater discharge totaled approximately 43 cubic meters per second (1,520 ft3/s) with domestic contamination representing 56% of this total and industrial effluent at 44%. The problem was compounded by a lack of chlorination systems among water service providers. Therefore, 20% of water service providers in 1991 did not comply with bacteriological norms. From its inception in 1990, the Superintendencia de Servicios Sanitarios (SISS) put greater attention and effort towards increasing the number of adequate chlorination systems. By 2006, improvements were made regarding chlorination systems and only 1% of water service providers were non-compliant. Furthermore, compliance with disinfection norms increased from 89% to more than 99% in 2006 through similar effort. Improvements have also been made in wastewater treatment over recent decades as the National Commission of the Environment (CONAMA) set in motion a policy that has seen treatment programs for raw domestic wastewaters increase to 80% in 2006 and 95% by 2010. CONAMA also sought to expand industrial wastewater treatment to 50% of these discharges by 2006. As of 2006, nonpoint source pollution, mainly from agriculture, had not yet been quantified. Irrigation Created in 1975, the National Commission on Irrigation (La Comisión Nacional de Riego (CNR)) is tasked with developing, improving, and maintaining irrigation and drainage infrastructure in Chile. In 1992, CNR estimated 1.8 million hectares (4.7 million acres) of land were under irrigation while total potential capacity for surface irrigation in Chile stood around 2.5 million hectares (6.8 million acres). Irrigated area in Chile accounts for 82% of total cultivated area while the remainder of agriculture uses rainwater. CNR includes 730,000 hectares of "eventual" irrigated land in their figure of 1.8 million hectares. Only 3% of surface area in Chile is agricultural land, and this sector accounts for only 4.8% of Chile's GDP. Employment in the agricultural sector in 2005 stands at 13.2% of the total labor force. The primary crops grown in Chile are grapes, apples, peaches, wheat, corn, and oats. Most of Chile's crops are grown in the central regions considered the agricultural heartland due to its temperate growing climate. Chile made a conscious decision to produce high-quality products for the international market,