I have a 14 month old cat. I live in an apartment in New York City. Every once in a while…

I am very cautious about using any chemicals in my house with my cats. Boric acid has been used as a relatively non-toxic insecticide and this may be an option to look into. I am unsure of its effectiveness with water bugs but people do use it with ant and cockroach infestations. With any product you use, follow directions carefully and limit your cat's contact with the product.