The EPA has published a basic guide for disinfecting wells: Complying with the Stage 1 Disinfectants and Disinfection Byproducts Rule: Basic Guide. It’s designed for small systems adding any chemical disinfectant.
In addition to this guide, owners and operators of systems adding chlorine dioxide or ozone should obtain Supplement A of this guide or contact their state to learn about additional requirements of the Stage 1 Disinfectants and Disinfection Byproducts Rule.
Owners and operators of conventional filtration systems should read Supplement B of this guide or contact their state for more information on how additional requirements of the Stage 1 DBPR apply to them.