UIC_Chart

Underground Injection Control Classification Table

US EPA Classification	Injection Well Description

CLASS I (Class I Wells are banned in South Dakota)	Wells used to inject hazardous wastes beneath the lowermost USDW. Wells used to inject industrial non-hazardous liquid wastes beneath the lowermost USDW. Wells used to inject municipal waste waters beneath the lowermost USDW. Click here for a link to ARSD* Chapter 74:55 Underground Injection Control (Class I, III, IV, and V)

CLASS II	Wells used to dispose of fluids associated with the production of oil and natural gas. Wells used to inject fluids for enhanced oil recovery. Wells used for the storage of liquid hydrocarbons. Click here for a link to ARSD Chapter 74:10 Underground Injection Control (Class II)

CLASS III	Wells used to inject fluids for the extraction of minerals. Click here for a link to ARSD Chapter 74:55 Underground Injection Control (Class I, III, IV, and V)

CLASS IV (Class IV Wells are banned in South Dakota)	Wells used to dispose of hazardous or radioactive wastes into or above a USDW (EPA*** has banned the use of these wells.) Click here for a link to ARSD Chapter 74:55 Underground Injection Control (Class I, III, IV, and V)

CLASS V	Wells not included in the other classes used to generally inject non-hazardous fluid into or above a USDW. Click here for a link to ARSD Chapter 74:55 Underground Injection Control (Class I, III, IV, and V)

	USDW = Underground Source of Drinking Water ARSD = Administrative Rules of South Dakota ** EPA = Environmental Protection Agency

For more information on the Underground Injection Control Program, please contact Sheldon Hamann at (605) 773-3296.