- Failed some Health Guidelines
- Failed some Legal Limits
- Failed some Reporting and Monitoring Requirements
- Uses Chlorine disinfectant
Chicago receives its water from Lake Michigan. The worlds largest wastewater treatment plant is located in Stickney, a suburb of Chicago and independent water quality assessments have rated the area's drinking water as excellent. Most of the time, the water that comes out of Chicago's taps meet or exceeds that of bottled water. Most officials and environmental experts have said that Chicago's drinking water is safe and tasty, but there are reasons individuals should filter their water to remove various substances and odors. In recent years, radioactive elements and lead have exceeded health guidelines.
Chicago, IL Water Quality Recent Violations
There were no health violations for in the 2010-2012 reporting periods
There was 1 other violation found in Chicago, IL by the EPA in the 2010-2012 reporting periods. They are listed in the table below.
|Drinking Water Rule or Contaminant||Date Violation Last Reported||Violation Type||Violation||Number of Violations||Avg Violation||Max Violation||State Standard||Unit of Measure||Enforcement Action|
|Total Coliform Rule||2011-03-08||Monitoring or reporting violation||Monitoring, Routine Minor (TCR)||1||0||Compliance Achieved|
Chicago, IL Water Quality Historical Violations
|Contaminant||Total Tests||Positive Results||Above Health Limits||Above Legal Limits||EPA Regulated||Max Result||Health Limit||Legal Limit|
|Combined Radium (-226 & -228)||19||18||18||12||Yes||20.70||-||5|
|Alpha particle activity||17||17||17||6||Yes||41.10||-||15|
|Alpha particle activity (excl radon and uranium)||16||16||6||6||Yes||39||15||15|
|Alpha particle activity||1||1||1||0||Yes||0.88||-||15|
|Combined Radium (-226 & -228)||1||1||1||0||Yes||1.38||-||5|
|Combined Uranium (pCi/L)||19||14||0||0||Yes||10.30||15||15|
|Nitrate & nitrite||17||8||0||0||Yes||2.69||10||10|
|Total haloacetic acids (HAAs)||78||63||0||0||Yes||38||70||60|
|Total trihalomethanes (TTHMs)||79||77||0||0||Yes||42.80||-||80|
36 Contaminants were detected, 5 above legal limits, 5 above health guidelines, and 26 below limits for water suppliers serving Chicago, IL between 2004 and 2009.
2 Water Contaminants were tested for in the Chicago, IL area but not found in drinking water between 2004 and 2009.
Data Source: NYTimes.com
The scores and results above reflect a summary of the historical drinking water testing results that has been documented by the EPA and other sources. The color coding of the symbols was developed by WaterFilterComparisions.com as an easy way for individuals to gauge the historical effectiveness of Chicago water suppliers in meeting legal and health regulations in providing clean drinking water. This should only be used as a guide, and WaterFilterComparisons recommends you contact Chicago water suppliers to better understand the quality of the drinking water in Chicago, .