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Cornell Soil Health Laboratory Guide to Prohibited Counties in the USA and Root Health 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: Broward, Miami-Dade

Idaho: Bingham, Bonneville

Oregon: Curry

Texas: Cameron, Hidalgo, Webb, Willacy, Zapata

Root Health 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 fromĀ  outside the continental United States or these Restricted States and Counties:

Entire state:

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

Restricted Counties:

  • New Mexico: Dona Ana, San Juan
  • New York: Cayuga, Livingston, Nassau, Orleans, Seneca, Steuben, Suffolk, Wayne
  • Virginia: Virginia Beach, Chesapeake, Suffolk, Isle of Wight, Hampton, York, James City

Printable list: CSHL Guide to Restricted Soils 5-4-2017

Cornell Soil Health Laboratory Map of Regulated States

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