I assume, based on my experience, you are showering to bring the temperature down quickly, improve peel of the casing and maybe remove smoke residue. And I am also assuming that you are using a semi-permeable casing for a sausage product or a meat "log" that then gets further processed.
I would include the shower nozzles as part of the environmental listeria swabs or sanitation ATP swabs but not an everyday thing considering you're smoking to high temps and should be killing things on the nozzles and potentially cleaning smokehouses to get rid of the smoke residue between products. If you start getting positives from those things, then you consider testing the water itself as part of the investigation.
Why are you testing the water weekly? Without a history of positive results, that seems like overkill, but I live where the city water is really clean.
You are correct on both points. Our post-cooking shower process serves the purposes of temperature reduction, casing peel improvement.
Regarding sanitation, we remove the rinse lines monthly as part of our Master Sanitation Schedule (MSS) and submerge them in a chemical bath for deep cleaning. Additionally, nozzles are replaced every three months to maintain optimal hygiene and performance.
That’s a great suggestion—I will look into adding the shower nozzles to our Random Site Generator for weekly ATP swabbing as part of our sanitation program.
We conduct weekly water testing as a preventive measure, rather than in response to historical positives. This policy was already in place before I assumed my role with the company. Up to this point, we have not specifically tested post-cook shower water for Listeria monocytogenes (Lm), as there has been no identified risk in our hazard analysis.
However, during a recent discussion with our USDA inspector, it was brought to our attention in preparation for our upcoming Food Safety Assessment (FSA). that the Notice of Intended Enforcement (NOIE) review will request whether post-cook water is addressed in our HACCP flow chart and whether we have a history of Lm testing in post-lethality water at the smokehouse.
Given this, we are currently reviewing our hazard analysis and preventive controls to determine the appropriate approach to ensure compliance.