Healthy soil is the foundation of successful gardening. The first step to cultivating healthy soil is having your soil tested. Collecting soil samples only takes a few minutes and has many benefits. It can help you save money in your lawn, garden and landscape, can result in healthier plants by telling you which nutrients are already in your soil and which you need to add, and can protect water quality by preventing unnecessary fertilizer applications. Read about testing your soil: https://chatham.ces.ncsu.edu/soil-testing-for-lawns-and-gardens/
The National Resources Conservation Service (NRCS) has compiled a soil survey of in every county in the US. These documents provide detailed maps and descriptions of the soils in the county. The Chatham County Soil Survey is available at: https://www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/north_carolina/NC037/0/Chatham.pdf
Online interactive soil maps can be found at https://websoilsurvey.nrcs.usda.gov/app/HomePage.htm
Soil maps are also available at the Chatham County GIS website http://www.chathamnc.org/government/departments-programs/soil-water-conservation/our-services/soils-information-and-maps
Descriptions of the soil map units below are on page 7 of the NRCS Chatham Soil Survey (link above).