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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Real EPA measurements of chlorine & chloramine for Illinois water systems — Six-Year Review compliance samples 2012–2019 (historical). Methodology
EPA does not publish per-city chlorine & chloramine measurements for Illinois in the datasets we use, so this section shows what regulators actually recorded: every Safe Drinking Water Act violation tied to chlorine & chloramine at the 56 Illinois public water systems we track, since 2016. Source: EPA SDWIS via ECHO (2026 Q2 extract).
6 of 56 tracked Illinois systems logged 7 chlorine & chloramine violations since 2016; 0 were health-based (a limit or treatment requirement), the rest monitoring or reporting failures.
| System | Pop. served | Violations | Health-based | Latest | EPA record |
|---|---|---|---|---|---|
| Cicero CICERO | 83,000 | 2 | 0 | 2022-01-01 Monitoring and Reporting (DBP) | IL0310510 |
| Downers Grove DOWNERS GROVE | 49,425 | 1 | 0 | 2017-04-01 Monitoring and Reporting (DBP) | IL0430300 |
| DeKalb DEKALB | 40,290 | 1 | 0 | 2018-04-01 Monitoring and Reporting (DBP) | IL0370100 |
| Carol Stream CAROL STREAM | 39,854 | 1 | 0 | 2025-05-01 Monitoring and Reporting (DBP) | IL0430200 |
| Oswego OSWEGO | 38,169 | 1 | 0 | 2024-09-01 Monitoring and Reporting (DBP) | IL0930150 |
| Gurnee GURNEE | 30,193 | 1 | 0 | 2020-04-01 Monitoring and Reporting (DBP) | IL0970350 |
Every Illinois system with a chlorine & chloramine result in EPA's data, sorted by level. Averages of 2012–2019 finished-water samples, non-detects counted as zero — historical, not today's tap.
No chlorine & chloramine detections have been reported in Illinois cities.
Chlorine and chloramine are disinfectants added to kill harmful bacteria. While essential for preventing waterborne diseases, they can cause eye and nose irritation, stomach discomfort, and unpleasant taste. Chlorine can react with organic matter to form disinfection byproducts linked to increased cancer risk with long-term exposure. Chloramine is toxic to fish and problematic for dialysis patients.
Water additive used to control microbes; formed when chlorine combines with ammonia (chloramine)
Based on our analysis of EPA Safe Drinking Water Information System (SDWIS) data and local water utility reports,chlorine & chloramine has been detected in 0 Illinois water systems.
The EPA MRDL is 4.0 mg/L for both chlorine and chloramines. The EPA MCL for chlorine & chloramine is 4 mg/L. This limit is set to protect public health based on available scientific evidence about the contaminant's health effects.
0 Illinois cities have chlorine & chloramine detected in their water supply. All tested cities are within EPA safety limits.
Eye and nose irritation, unpleasant taste, formation of disinfection byproducts. The most vulnerable groups include dialysis patients (chloramine) and people with respiratory conditions.
The most effective methods for removing chlorine & chloramine include Activated Carbon, Catalytic Carbon, KDF Media. Look for filters certified by NSF/ANSI for chlorine & chloramine reduction.
The EPA Maximum Contaminant Level (MCL) for chlorine & chloramine is 4 mg/L.The EPA MRDL is 4.0 mg/L for both chlorine and chloramines.
This page shows what Illinois utilities reported for chlorine & chloramine. It cannot tell you what is coming out of your own tap: utility samples are taken across a whole system and averaged, levels vary by address and season, and anything picked up after the water leaves the main never appears in their report.
Home water test kitscheck your own tap before buying any filterRecommended filtration methods for chlorine & chloramine removal:
Very effective for chlorine
Required for chloramine removal
Good for whole-house systems
Paid links. We earn a commission if you buy, at no extra cost to you. Filters are matched to the removal methods listed above for chlorine & chloramine.