When the need arises for you to contract the services of a professional PCO there are many things to consider. The product must also have instructions on its label for controlling the pest in question as well as the site in or around the home where it is intended to be used. Of course you should also look into the guarantee the PCO may offer and the cost for the job to be completed. In Suffolk County the pest control business must be licensed with the Suffolk County Executive's Office of Consumer Affairs, Bureau of Licensing.
Liability insurance is also a requirement.
You can check with your local town or village to see if additional requirements exist for a business operating in your locale. They do not provide lists of recommended companies. Some of the best advice concerning a company may come from a previously satisfied customer. Check with relatives, neighbors or friends for names of companies who have provided them with excellent, professional service. As when purchasing other services or products, it is recommended that you contact more than one PCO so that you can compare methods of control, guarantees, costs, etc.