Drip irrigation and the agricultural use of brackish water mitigate water scarcity in semi-arid regions and food insecurity. The objective of this study was to evaluate the clogging behavior in three types of non-pressure-compensating emitters applying dilutions of brackish water. The study was carried out in Mossoro, RN, Brazil. On a bench, three dripping units were installed in a split-split-plot scheme, in a completely randomized design with three replicates. Plots comprised three dilutions of brackish water (BW) in supply water (SW) (D1 - 100% of SW; D2 - 50% of SW plus 50% of BW; and D3 - 100% of BW), subplots comprised three types of non-pressure-compensating drippers (NJ - NaanDanJain, SL - StreamLine and ST - Super Typhoon), and sub-subplots comprised evaluation times (0, 20, 40, 60, 80, 100, 120, 140 and 160 h). Every 80 h and 20 h of operation, the physical and chemical characteristics of the dilutions and the clogging indices (DUC) and relative flow rate reduction (RQR) were determined, respectively. The pH, EC, DUC and RQR were subjected to MANOVA and post-hoc test. The SL-D3 combination had greater clogging, reducing the DUC from 93% to 68%; the combinations least affected by clogging were SLD1 and NJ-D2, both ending the tests with a DUC of 90%. There was a statistically significant variation in the DUC and RQR coefficients over the periods from 0 to 160 h and from 80 to 160 h, with no statistically significant variation from 0 to 80 h.