Our School's EHS responded to a question that was brought up about phenolphthalein:
"I verified this with the wastewater district, and they confirmed that it [phenolphthalein] cannot be disposed of down the drain. I want to be cautious here if we start discharging materials improperly, it could trigger a wastewater audit and potentially open Pandora’s box for the college."
What do you all do? Are you still using phenolphthalein or have you replaced phenolphthalein with something like bromthymol blue or something similar? Do you get the same results or better?
or...
Are you still using phenolphthalein, if so how do you deal with the waste? If collecting the waste, is it worth the cost of disposal?
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