Asked April 08, 2020, 4:15 PM EDT
Jackson County Oregon
Cat feces can contain a parasite that causes Toxoplasmosis. Because you know that the compost is contaminated it does pose a human pathogen risk if used on edible plants. The safest option would be to use this compost on non-edible garden plants (avoid breathing in the dust and make sure to wash your hands after handling the material). You could also carefully apply the compost to edible plants where the edible portion does not come into contact with the ground, for example around the base of fruit trees. Another option would be to incorporate this compost into a new compost pile that you manage appropriately to kill pathogens. One scientifically validated process for a turned compost pile involves maintaining aerobic conditions at a minimum of 131°F for 15 days, with a minimum of five turnings, followed by adequate curing. This can be difficult to do in a home compost pile.
For more information about food safety in the home garden this publication from the University of California is a good resource: https://ucfoodsafety.ucdavis.edu/sites/g/files/dgvnsk7366/files/inline-files/203224.pdf