The National Plant Diagnostic Network is a premier diagnostics system with over 70 diagnostic labs in 50 states and 4 territories (Puerto Rico, US Virgin Islands, Guam, and American Samoa). These labs serve a diverse clientele on a wide array of plant health issues. We protect national plant health by quickly detecting and accurately identifying plant pests and pathogens and effectively communicating these diagnoses to stakeholders and clientele. When pathogens or pests of concern are found, NPDN laboratories report their findings to appropriate responders and decision makers to facilitate quick responses that better protect the health of our plant systems.

The NPDN is divided in five regions shown in the map. Click on the map to find a diagnostic lab.

Colorado Kansas Montana North Dakota Nebraska Oklahoma South Dakota Wyoming Iowa Illinois Indiana Michigan Minnesota Missouri Ohio Wisconsin Connecticut Delaware Massachusetts Maryland Maine New Hampshire New Jersey New York Pennsylvania Rhode Island Vermont West Virginia Alabama Arkansas Florida Georgia Kentucky Louisiana Mississippi North Carolina Puerto Rico South Carolina Tennessee Texas Virginia Virgin Islands Alaska American Samoa Arizona California Guam Hawaii Idaho Nevada New Mexico Oregon Utah WashingtonNPDN Map