Optimasi peningkatan kualitas air sumur gali melalui penggunaan tawas (Aluminium Potassium Sulfate) terhadap Escherichia coli

Background: well water provide that comes from a layer of soil is relatively close to the ground surface, therefore it easily exposed contamination through seepage. In general, seepage human excreta, latrines or and animals, as waste itself, either because floor sewerage are not impermeable water. The condition construction way drawn can also be source contamination, for example wells with open drawing bucket. One fecal bacteria found in Escherichia coli. Alum (Aluminum sulfate) one anti-microbial.Objective: To determine effect alum concentrations 5%, 10% 15% on amount coli waterMethod: explanatory research (explanatory research) which explain relationship between variables comparison hypothesis testing, using quasi experimental design method used this study Completely Randomized Design 3 repetitions.Results: results ANOVA test content E. various obtained P value 0.000 an alpha 0.05, indicating there was significant difference observed concentrations.Conclusion: affected number higher concentration alum, better inhibiting growth E.coli water.Conclusion: