The extent of water pollution on some rivers and lagoons within Badagry and its environs in Lagos State Nigeria has been critical analyzedwith respect to the physico-chemical properties of the surface and underground waters and the results show that total dissolved solids for sea water ranged from 4523-4408 ppm, lagoon water 622-1471 ppm and borehole water 250-61 ppm. Total suspended solid for sea water ranged from 422-231 ppm, lagoon water 129-133 ppm and borehole water 41-146 ppm. Salinity values for sea water ranged from 0.3-0.3 ppm, lagoon 0.5-0.3 ppm and borehole water 0.1-0.3 ppm. Methyl orange alkalinity for sea water ranged from 3.5-3.0 ppm, lagoon water 1.1-1.0 ppm and borehole water 0.5-0.8 ppm. Phenolphthalein alkalinity for sea water ranged from 0.4-0.2 ppm, lagoon water 0.2-0.3 ppm and borehole water 0.1-0.2 ppm. Specific gravity for sea water ranged from 16.371-16.407 ppm, lagoon water 15.878-15.673 ppm and borehole water 15.554-15.839 ppm. Heavy metals such as Ca2+ for sea water ranged from 436-427, lagoon water 497-488 and borehole water 345-336. Mg2+ for sea water ranged from 128-136, lagoon water 133-189 and borehole water 112-116. Fe2+ for sea water ranged from 2.546-2.512, lagoon water 2,786-2.869 and borehole water 1.465-1.354. Cu2+ for sea water ranged from 2.84-2.62, lagoon water 3.86-3.86 and borehole water 0.84-0.93. Mn2+ for sea water ranged from 0.756-0.726, lagoon water 1.026-1.022 and borehole water 0.450-0.470. Cr2+ for sea water ranged from 1.07-1.248, lagoon water 1.897-1.957 and borehole water 0.026-0.028. Bio-chemical analysis such as temperature for sea water ranged from 27.5-28.5 ˚C, lagoon water 29.8-28.7 ˚C and borehole water 27.6-27.8 ˚C. pH for sea water ranged from 6.8-6.8, lagoon water 6.9-7.0 and borehole 7.3-7.2. BOD and COD in see water ranged from 754-766; 1876-1833 mg/l respectively, lagoon water 978-986; 1943-1982 mg/l respectively whereas the dissolved oxygen for borehole water ranged from 5.54-5.66 mg/l
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