Water and supply

Au
I know I don't drink enough water. I try my hardest but it usually doesn't happen with an almost 5 month old needing my constant attention. I don't take supplements, or eat any certain foods to try and boost my supply. I'm exclusively breastfeeding and am hoping to bf until at least 6 months; id love to be able to for a year. I'm just a little worried about what could happen to my supply since I know I'm dehydrated a lot. 
Is it possible that your body can continue to provide enough milk for baby even under these kind of circumstances?