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Cornell Soil Health Laboratory Guide to Prohibited Counties and Bean Root Bio-Assay Restrictions

Definition of prohibited counties: Areas from where APHIS regulated soil should neither be packaged or shipped. Soil received from these counties will be treated as quarantined and destroyed without processing.

Current List of Prohibited Counties:

California: Alameda, Contra Costa, Humboldt, Lake, Los Angeles, Marin, Mendocino, Monterey, Napa, Orange, Riverside, San Diego, San Francisco, San Mateo, Santa Claro, Santa Cruz, Solano, Sonoma, Trinity

Florida: Miami-Dade

Idaho: Bingham, Bonneville

Oregon: Curry

Texas: Cameron, Hidalgo, Willacy

Printable list: cornell-soil-health-laboratory-prohibited-counties

Bean Root Bio-Assay Restrictions

Due to United States Department of Agriculture, Animal and Plant Health Inspection Service regulations the Cornell Soil Health Laboratory cannot perform the Bean Root Bio-Assay on soil from these states and counties:

Entire state:

  • Alabama
  • Arkansas
  • California
  • Georgia
  • Florida
  • Idaho
  • Louisiana
  • Mississippi
  • North Carolina
  • Oklahoma
  • Oregon
  • South Carolina
  • Tennessee
  • Texas
  • Washington

Certain counties in individual states:

  • Arizona: La Paz, Maricopa, Pinal
  • Colorado: Alamosa, Conejos, Costilla, Rio Grande, Saguache
  • Kansas: Montgomery
  • Nebraska: Gage
  • Nevada: Humboldt
  • New Mexico: Dona Ana, San Juan
  • New York: Cayuga, Livingston, Nassau, Orleans, Seneca, Steuben, Suffolk, Wayne
  • Utah: Iron, Weber
  • Virginia: Virginia Beach, Chesapeake, Suffolk, Isle of Wight, Hampton, York, James City
  • Wyoming: Laramie
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