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Application of the organic chlorination in the treatment of tubedripper used in the irrigation with water high in iron content. To evalute the effect of the organic chlorination in the uniformity of water distribution and in the outflow of a tubedripper with 2,2 L h-¹ had been tested four levels of concentrations of dicloroisocinaurato of sodium (N1 = 0, N2 = 15, N3 = 30 e N4 = 45 mg L-¹ of free chloine). The evaluation had been crried through in the beginning of the experiment and to each 100 hours of functioning of the system, totalizing 8 evaluations. In the calculation of the unifoumity of distribution (CUD) and emission (Us). Also the study of the level N1, reductions of 23; 30.2 and 8.35% for the CUC, CUD and US, respectively. The discharge presented a 6.13% reduction, reflecting in-an increase of the CVq. The treatment with dicloro was efficient ot prevent against clogging for all the used concentrations and the system was classifed with excellent uniformity in practically all the evalutions. [ABSTRACT FROM AUTHOR]