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In January 2017, PA 99-0922 amended the Illinois Environmental Protection Act (415 ILCS 5/et seq) to require annual service line material inventories. This provision also provides for disturbance notifications.

From Sec. 17.11. Lead in drinking water notifications and inventories. (Source: P.A. 99-922, eff. 1-17-17.)

(c) The owner or operator of each community water system in the State shall develop a water distribution system material inventory that shall be submitted in written or electronic form to the Agency on an annual basis commencing on April 15, 2018 and continuing on each April 15 thereafter until the water distribution system material inventory is completed. In addition to meeting the requirements for water distribution system material inventories that are mandated by the United States Environmental Protection Agency, each water distribution system material inventory shall identify: the total number of service lines within or connected to the distribution system, including privately owned service lines; the number of all known lead service lines within or connected to the distribution system, including privately owned lead service lines; and the number of the lead service lines that were added to the inventory after the previous year's submission. Nothing in this subsection shall be construed to require that service lines be unearthed.

Illinois EPA and DoIT established a web service for the Responsible Operators In Charge of the respective community water supplies to load their summary data into. In the future, Illinois EPA will audit the inventories as part of our routine evaluations of community water supplies as described below.

Summary of Public Water Supply Service Line Material Inventories