Underground Injection Control (UIC) Program

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The Underground Injection Control (UIC) program serves to protect the quality of Hawaii’s underground sources of drinking water from chemical, physical, radioactive, and biological contamination that could originate from injection well activity.

Underground Injection Wells are wells used for injecting water or other fluids into a groundwater aquifer. Department of Health Administrative Rules, Title 11, Chapter 23 provides conditions governing the location, construction, and operation of injection wells so that injected fluids do not migrate and pollute underground sources of drinking water. Section 4 of the Rules gives the criteria for classifying aquifers into those that are designated as underground sources of drinking water and those that are not.

The boundary between exempted aquifers and underground sources of drinking water is generally referred to as the “UIC Line”. Restrictions on injection wells differ, depending on whether the area is inland (mauka) or seaward (makai) of the UIC line.

The UIC Maps show the areas inland and seaward of the UIC line on all major islands. These maps are meant for general informational purposes only. The Department holds the official UIC maps containing detailed information about the UIC Line. For more information, contact the Safe Drinking Water Branch’s UIC Program.

                                                                               Submit UIC On-line Application

UIC Maps of Hawaiian Islands

Underground Injection Wells are wells used for injecting water or other fluids into a groundwater aquifer. Department of Health Administrative Rules, Title 11, Chapter 23 provides conditions governing the location, construction, and operation of injection wells so that injected fluids do not migrate and pollute underground sources of drinking water. Section 4 of the Rules gives the criteria for classifying aquifers into those that are designated as underground sources of drinking water and those that are not.

The boundary between non-drinking water aquifers and underground sources of drinking water is generally referred to as the “UIC Line”. Restrictions on injection wells differ, depending on whether the area is inland (mauka) or seaward (makai) of the UIC line.

The UIC Maps show the areas inland and seaward of the UIC line on all major islands. These maps are meant for general informational purposes only. The Department holds the official UIC maps containing detailed information about the UIC Line. For more information, contact the Safe Drinking Water Branch’s UIC Program.

To use the maps below, use the navigation tools to zoom to your area of interest. Click on the map to find the UIC Code for that location:

Code1 – BELOW (makai) UIC LINE

  • Underlying aquifer not considered drinking water source
  • Wider variety of wells allowed
  • Injection wells need UIC Permit or Permit Exemption
  • Permit limitations are imposed

Code100 – ABOVE (mauka) UIC LINE

  • Underlying aquifer considered drinking water source
  • Limited types of injection wells allowed
  • Injection wells need UIC Permit or Permit Exemption
  • Permit limitations are imposed and requirements are more stringent

 

Island of Oahu

Island of Kauai

Maui County

 

Island of Hawaii

Contact Us

Phone: (808) 586-4258
Fax: (808) 586-4351
E-Mail: sdwb@doh.hawaii.gov

  • Oahu
    Safe Drinking Water Branch
    Environmental Management Division
    Hawaii State Department of Health
    919 Ala Moana Blvd., Room 308
    Honolulu, HI 96814-4920
  • East Hawaii
    Safe Drinking Water Branch – Hilo
    Hawaii District Health Office – Hilo
    1582 Kamehameha Avenue
    Hilo, Hawaii 96720
    Phone: (808) 933-0401
    Fax: (808) 933-0400

Last Update: 30 September 2013