Tapcensus

Long Term 2 Enhanced Surface Water Treatment Rule (LT2) violations in Illinois

14 active public water systems in Illinois had a Long Term 2 Enhanced Surface Water Treatment Rule (LT2) violation in the past three years. What Long Term 2 Enhanced Surface Water Treatment Rule (LT2) is and why it matters.

Health effects: Cryptosporidium is a chlorine-resistant protozoan parasite that causes cryptosporidiosis — severe watery diarrhea, cramping, nausea, and fever. In immunocompromised individuals (HIV/AIDS, transplant recipients), it can be life-threatening and prolonged. Infants and the elderly are also at elevated risk. LT2 violations indicate failure to complete monitoring or apply the required additional treatment tier.

Systems with a Long Term 2 Enhanced Surface Water Treatment Rule (LT2) violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Carbondale
Carbondale · Jackson County 		22,107 3 0
South Highway Pwd
Jackson County 		4,972 3 0
Gillespie
Macoupin County 		3,737 8 3
Lakeside Pwd
Jackson County 		3,065 4 0
Benld
Benld · Macoupin County 		1,612 2 1
Devils Kitchen Water District
Williamson County 		1,428 6 1
Buncombe Water District
Jackson County 		1,030 5 1
Blairsville Pwd
Carterville · Williamson County 		807 6 1
Sawyerville
Sawyerville · Macoupin County 		578 4 1
Dorchester
Dorchester · Macoupin County 		540 2 0
Wilsonville
Wilsonville · Macoupin County 		536 3 1
Mount Clare
Mount Clare · Macoupin County 		311 1 0
Evergreen Wildwood Mobile Home Park
Carbondale · Jackson County 		230 6 1
Eagarville
Eagerville · Macoupin County 		127 8 0
About this data

A system is counted once if any of its violations in the past three years involved Long Term 2 Enhanced Surface Water Treatment Rule (LT2), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Long Term 2 Enhanced Surface Water Treatment Rule (LT2) alone.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Illinois records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.