The importance of the removal and recovery of fluorine from Turkish fertilizer plant effluents has been emphasized. Even though the economic evaluation of the processes developed are not based on capital and operating costs for the processes there are strong economic incentives to adopt recovery apart from clear environmental needs. Selection of the methods for the removal of fluorine through production processes specifically the dependence of the choice of waste treatment process on available H 2SiF 6 concentration have been discussed. The production of acid grade calcium fluoride and sodium fluosilicate from waste fluosilicic acid solutions were studied. The optimum process conditions were determined. It has been found that it is possible to produce these industrially valuable fluorine compounds from 2.5 to 4.5% H 2SiF 6 containing waste waters and in appropriate conditions both processes are effective in removing 90–95% of the fluorine present in waste fluosilicic acid solutions. It has been shown that for the production of acid grade calcium fluoride and sodium fluosilicate the P 2O 5 content of waste fluosilicic acid solutions should be < 250 mg P 2O 5 I −1 and 300 mg P 2O 5 I −1 respectively. It has been suggested to make pilot plant studies for the industrial application of the processes.