We have a septic system and I never want to replace it! So I do use bleach in white clothes, use the dishwasher, just rinse the dishes. Those little pods make the dishes sparkle! The bleach solution we used in the hospital was a 10% solution, I use that in a spray bottle and apply topically to the item I want to disinfect. We have not had a problem with our septic, is 25 years old. I have a low water washing machine, don't love it but I like to conserve the amount of h2o that we use. Dishwashers usually have some type of sani cycle, so bleach really doesn't need to be used with day to day dishes. I think we all have to do what makes us comfortable, I know those systems cost a fortune, so I am pretty careful with mine.