Jon Anderson wrote:

On 7/11/2011 7:34 AM, Pete C. wrote:

Well, you certainly aren't going to get any algae blooms in a septic
system since it is not exposed to any light.

True, but would it be harmful to the bacteria that keeps the septic working?

I ask, as my ex used bleach a fair bit, and I learned sometime after our
divorce, that bleach is not good for septic systems. I never said
anything to the landlord about it. I don't use bleach myself, but don't
want to be flushing anything else into the tank that might cause
problems again.

Jon

The quarter cup of bleach you use in a load of laundry that gets flushed
into the 1,000 gal septic system tank along with another 30-40 gal of
water will have little effect on the overall bacteria level. Pour a full
gallon of bleach down the drain and you might have a problem.