Can you detox with water alonehow long will it take to get drugs out of the system would 15 hours be enough?

Here is an incomplete list of substances and detection time, water will decreae the time needed but not substantialy, and most tests will show if there is too much water in your urin, and you will have to take the test again. Urin cleansing drinks are available that will try to hide that and prevent successfull testing. SUBSTANCEBLOODSALIVASWEATURINEHAIR Alcoholunknownunknownunknown12-24 hrsn/a Amphetamineunknown3 daysunknown1-4 daysup to 90 days Barbituratesunknownunknownunknown1-21 daysunknown Benzodiazepinesunknownunknownunknown1-42 daysunknown Cannabis (single use)2-3 days12-24 hrsunknown2-3 daysup to 90 days Cannabis (habitual use)2 weeks12-24 hrsunknownup to 12 wksup to 90 days Cocaineunknown1 dayunknown4-5 daysup to 90 days Codeine/Morphineunknown12-36 hrsunknown2-4 daysup to 90 days Heroinunknownunknownunknown2-4 daysup to 90 days Methamphetamine1-3 daysunknownunknown3-5 daysup to 90 days PCP1-3 days3 daysunknown3-7 daysup to 90 days