Illinois Groundwater: What you need to know

Illinois Groundwater Protection Act (IGPA), 415 Illinois Compiled Statutes (ILCS) 55/1 to 55/9.1 and regulations at 35 Illinois Administrative Code (IAC) 620.105 to 620.615, and Appendices A to D

Groundwater standards: 35 IAC 620

Groundwater classifications: 35 IAC 620.201

Groundwater management zones: 35 IAC 620.250

Setback zones: 35 IAC 618.200

Groundwater recharge areas: 35 IAC 617

Prohibitions: 35 IAC 617.120

Road sign posting: 35 IAC 617.140

Methyl Tertiary Butyl Ether (MTBE) Elimination Act, 415 ILCS 122/15

Illinois Environmental Protection Agency (IEPA) Bureau of Water Illinois Pollution Control Board (IPCB)

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

• Rules. IEPA has a groundwater protection act and groundwater recharge regulations that limit the siting of new facilities and consider groundwater as a statewide resource. Illinois also prescribes requirements and standards for the protection of groundwater for certain types of existing facilities or units located wholly or partially within a setback zone or within a regulated groundwater recharge area. Groundwater monitoring requirements for hazardous waste facilities are the same as the federal requirements.

The state generally follows the federal primary drinking water standards and has incorporated the new maximum contaminant level (MCL) for arsenic of 0.01 milligrams per liter, effective January 23, 2006 (35 IAC 611.301). For additional guidance about the federal Safe Drinking Water Act and MCLs, see the national section DRINKING WATER.

• Administration and enforcement. IEPA administers and ...