Environmental Health

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Retail Food Program            

The Princeton Health Department conducts unannounced, and sometimes announced inspections of all retail food establishments in Princeton.            

These establishments include, but are not limited to, restaurants, bakeries, delis, supermarkets, catering facilities, institutions, mobile units and temporary events. These inspections are conducted by trained Public Health Professionals with college degrees who are also licensed New Jersey Registered Environmental Health Specialists.            

Click here for the Restaurant Inspection Reports            

While on site, inspectors focus on evaluating foodborne illness risk factors and interventions, focusing on regulations set forth in Sanitation in Retail Food Establishments - NJ. Risk factors are improper practices identified as the most common factors resulting in foodborne illness, while interventions act as control measures to prevent foodborne infection. Specific interventions include: knowledge of food safety principles by the person in charge, proper hand washing, approved food source, prevention of cross contamination of food, food temperature controls, such as receiving and storage, cooking, chilling, hot and cold holding and reheating. Good retail practices are also evaluated, such as safe food and water sources, cleaning and sanitizing procedures, insects, temperature controls, and physical facilities.                  

Operating Requirements              

If you are interested in opening a retail food establishment in Princeton an application is required (see forms below). Construction permits, change of owner permits and other licenses may be required based upon your specific situation. For more information regarding retail food establishment regulations and proper operation, please contact the Princeton Health Department (609) 497-7608.

Radon Testing


Test and fix homes to save a life.  Radon is a naturally occurring radioactive gas that you can’t see, taste, or smell. Radon is the second leading cause of lung cancer in the United States resulting in approximately 20,000 deaths annually. There is no truly “safe” level of radon; however the risk decreases as the radon concentration decreases. The only way to know if you have high levels of radon is to have your home tested. Testing is easy, inexpensive, and high levels of radon can be fixed.  Princeton as a municipality ranks as a Tier 1 radon potential, see This means there is a high radon potential for homes in Princeton.             

Radon test kits are available at the Princeton Health Department.  Kits can be picked up anytime between the hours of 9 a.m. – 5 p.m., Monday – Friday, no advance notice necessary.  The Radon test kits available are approved for real estate transactions.  A testing fee is associated with the kit, with instructions for payment inside of the packaging.

Princeton Mosquito Control            

Mercer County, is a generally low lying area sitting on the inner coastal plain adjacent to the Delaware River. Mercer County has one of the more diverse, urban / rural settings in New Jersey and has large areas that have potential to breed mosquitoes. These areas include, farm land, wetlands (primarily fresh water), home yards, storm water facilities, and sewer plants. These areas need to be addressed as effectively as possible to control mosquitoes and the viruses they can spread. One of the best ways to control a pest over a large area is by approaching the area as an area-wide integrated pest management.            

Integrated pest management is an approach that focuses on multiple sources to control a pest; while area wide tries to group it all together and get everyone working at once. Mercer County Mosquito Control, which is operated under the Mercer County Division of Transportation is the lead agency overseeing mosquito testing, control, and education for Princeton.            

Mercer County Mosquito Control employs four proven control techniques:

  • Biological Control-The use of other animals (fish, insects, bacteria, etc.)
  • Chemical Control-The use of pesticides
  • Cultural Control-Education
  • Environmental Control-Reduction of breeding habitat      


For more information on mosquito control including: general information, current happenings, pesticides/products used, what you can do, inspection requests, west nile virus information, and publications, please visit the Mercer County Division of Mosquito Control Page.    


Mosquito-Proof Your Yard              

County Mosquito Control:  Zika Virus Information              

Mercer County Mosquito Control – Asian Tiger Brochure              

Albopictus Brochure


For complaints regarding standing/stagnant water in Princeton, please report it here or call Access Princeton to report the problem.

Additional Resources

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