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Publication #SL63

Okeechobee County: Soil Ratings for Selecting Pesticides 1

G.W. Hurt, T.A. Obreza2

Resource soil scientists with the USDA Natural Resources Conservation Service have rated the soils that are delineated by map units in the Okeechobee County Soil Survey Report (see references) for their potential for leaching and runoff of pesticides. The rating criteria are given in a companion publication (Circular 959) entitled "Soil Ratings for Selecting Pesticides for Water Quality Goals." These soil ratings have been developed to help pesticide users determine the potential for pesticides to be lost to groundwater or surface water bodies.

As explained in Circular 959, factors that determine pesticide leaching ratings in soil are permeability and the occurrence of mucky layers in the upper 80 inches of the soil. Soils rated High have a high potential for pesticides to leach to groundwater, soils rated Medium have a medium potential for pesticides to leach to groundwater, and soils rated Low have a low potential for pesticides to leach to groundwater. Factors that determine pesticide runoff ratings from soils are hydrologic group, permeability, and slope. Soils rated High have a high potential for pesticide runoff, soils rated Medium have a medium potential for pesticide runoff, and soils rated Low have a low potential for pesticide runoff.

NOTE: The user may discover that one or more map unit names in Table 1 have been updated from names given in the legend of the soil survey report (see references). For example, a soil map unit may be listed in the survey report with a single soil series name, whereas the same soil map unit is shown as comprising two or more soil series in the list in Table 1 (sequence numbers 1, 2, 3, ...) Where this occurs, the user should use the multi-named map unit given here, and make pesticide selections based on the most limiting condition to be found on the land in question. If necessary, the local Natural Resources Conservation Service office should be contacted to perform an on-site evaluation of the land in question.


  • Lewis, D., K. Liudahl, C. Noble and L. Carter. 2003. Soil Survey of Okeechobee County, Florida . USDA/NRCS in cooperation with University of Florida Agricultural Experiment Stations.

  • Obreza, T.A. and G.W. Hurt. 2006. Soil ratings for selecting pesticides for water quality goals. Circular 959. Soil and Water Science Department, FLorida Cooperative Extension Service, University of Florida, Gainesville, FL.


The development of this document was supported by the USDA/ES Water Quality Initiative Project #89EWQI-1-9134.


Table 1. 

Soil Ratings for Okeechobee County (see footnotes for explanations of column headings).







093002 1 2 Basinger High High
093003 1 3 Basinger High High
093003 2 3 Placid High High
093004 1 4 Bradenton Low High
093005 1 5 Valkaria High High
093006 1 6 Manatee Low High
093007 1 7 Floridana Low High
093007 2 7 Riviera Medium High
093007 3 7 Placid High High
093008 1 8 Pineda Medium High
093009 1 9 Riveria Medium High
093010 1 10 Ft. Drum Medium High
093011 1 11 Immokalee Medium High
093012 1 12 Udorthents Medium High
093013 1 13 Manatee Low High
093013 2 13 Floridana Low High
093013 3 13 Tequesta Low High
093014 1 14 Myakka Medium High
093015 1 15 Okeelanta Low High
093017 1 17 Orsino High Low
093018 1 18 Parkwood Medium High
093019 1 19 Floridana Low High
093019 2 19 Placid High High
093019 3 19 Okeelanta Low High
093020 1 20 Pomello Medium Medium
093021 1 21 Adamsville High Low
093023 1 23 St. Johns Medium High
093024 1 24 Terra Ceia Low High
093025 1 25 Wabasso Low High
093099 1 99 Water High High
MUID = Natural Resources Conservation Service's map unit identifier.
SEQ NUM = Sequence Number, indicating a particular soil name among one or more names constituting a map unit name.
MUSYM = Map Unit Symbol from the soil map and legend in the Soil Survey of Okeechobee County, Florida. Note that if a MUSYM appears more than once in this list it signifies that two or more soils are co-dominant in that map unit, and each such soil is rated separately here.
SOIL NAME = Name of soil or other landscape component (urban land, made land, borrow pits, spoil banks, etc.).
SOIL LEACH = The rating of the soil for leaching of pesticides through the soil profile.
SOIL RUNOFF = The rating of the soil for runoff of pesticides from the soil surface.

NOTE: See "Soil Ratings for Selecting Pesticides for Water Quality Goals" (IFAS Extension Circular 959) for explanations of the criteria used to develop soil ratings presented in the right-hand four columns of this list.



This document is SL63, a fact sheet of the Soil and Water Science Department, UF/IFAS Extension. First published: April 1991. Revised: September 2006. Reviewed June 2013. Please visit the EDIS website at


G.W. Hurt, National Leader for Hydric Soils, USDA Natural Resources Conservation Service; T.A. Obreza, professor, Soil and Water Science Department, UF/IFAS Extension, Gainesville, 32611.

The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county's UF/IFAS Extension office.

U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension.