Cockroach poop is easy to spot once you learn what to look for. The feces of these frightful creatures are shaped like small cylindrical pellets and colored black or brown. The size will depend on the size of the cockroaches and can range in size from small specks to larger pellet sized droppings, and you will usually see not just one, but a cluster of droppings scattered about the area.
The easiest place to find them are in rooms that have access to food and water, such as the kitchen and bathrooms. Looking under sinks, inside cabinets, behind refrigerators, etc., can be an easy way to find them. These areas are not usually cleaned very often and therefore the droppings can accumulate over time and make them easy to spot. Please reference the photograph of cockroach feces located behind a refrigerator in an apartment in Atlanta.
If you locate a good amount of droppings in your home, that of course means that you have a significant cockroach infestation that must be dealt with. Cockroaches carry bacteria that can be harmful to human health. Their feces contain proteins that can trigger allergic reactions in humans, causing asthma and other adverse symptoms. An infestation can also lead to roach bites, especially to children and pets.
If you would like to try and handle the problem yourself, boric acid powder is one of the best and cheapest ways to get rid of cockroaches. Sprinkle some of the powder in locations where cockroaches are likely to frequent: behind the refrigerator, in the the pantry, and in the back corners of kitchen and bathroom cabinets. In a couple days you will start to see dead cockroaches appearing around your house to let you know that it is working.