Execute the CDC fecal incident response protocol and choose the correct track (formed stool vs. diarrheal)

Steps

1. Close the venue to swimmers immediately; if multiple bodies of water share filtration, close all of them.
2. Remove the fecal matter with a net or bucket — never vacuum it, which can push pathogens through the system — and dispose of it and clean the removal tool in a sanitary manner.
3. For a formed-stool incident, raise free chlorine (using unstabilized chlorine) to at least 2 ppm, hold pH at 7.5 or below, and maintain for roughly 25–30 minutes (CDC's Giardia-based table also allows 1 ppm for 45 minutes or 3 ppm for 19 minutes).
4. For a diarrheal incident, treat it as a high-risk Cryptosporidium event and escalate directly to the hyperchlorination/CT protocol rather than the formed-stool steps.
5. Confirm the filtration system is running throughout, log the incident (date/time, stool type, FC and pH at time of discovery), and reopen only once required chlorine/pH/time have been met and are within the locally allowed operating range.