Enhancing sustainability of local rice mills by cleaner production and industrial ecological principles published in ICSBE DECEMBER 2010 by H.M.A.P Rathnayake1*, A.K. Kulatunga2, T.M.R. The work carried out in Sri Lanka because 70 percent of the paddy produced in Sri Lanka at present is parboiled. Two dominant wastages are released to environment in parboiled rice milling namely, soak water and paddy husks. For one metric ton of paddy, approximately 1.3 m3 of soaked water and 0.2 tons of paddy husk are released to environment and soaked water is discharged to the environment without being treated. Due to this, bad odour is prevailed in the vicinities of the mills. In addition, paddy husk and ash dumps are washed away with rain to the waterways. To minimize bad smell, millers are advised to change socking every 10-12 hours. Even though socking water is changed every 12 hours time COD and BOD5 levels of releasing water are higher than the values set by CEA. Therefore, sustainability of this industry relies addressing the waste streams in a productive manner. Therefore they cleaner production principle is adapted to minimize the waste generated by attacking the point of generation and using potion of treated wastewater for soaking process.