Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	IL0430900
PWS Name	WEST CHICAGO
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	25166
County Served	DuPage

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7125506	Returned to Compliance	01-OCT-2005	31-DEC-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7125406	Returned to Compliance	01-OCT-2005	31-DEC-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7125306	Returned to Compliance	01-JUL-2005	30-SEP-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7125206	Returned to Compliance	01-JUL-2005	30-SEP-2005	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	7124405	Returned to Compliance	08-APR-2005	-	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	7124505	Returned to Compliance	08-APR-2005	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7124705	Returned to Compliance	01-APR-2005	30-JUN-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7124805	Returned to Compliance	01-APR-2005	30-JUN-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7124205	Returned to Compliance	01-JAN-2005	31-MAR-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7124105	Returned to Compliance	01-JAN-2005	31-MAR-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7121705	Returned to Compliance	01-OCT-2004	31-DEC-2004	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7121505	Returned to Compliance	01-JUL-2004	30-SEP-2004	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7121204	Returned to Compliance	01-APR-2004	30-JUN-2004	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7120904	Returned to Compliance	01-JAN-2004	31-MAR-2004	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7120304	Returned to Compliance	01-OCT-2003	31-DEC-2003	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7120004	Returned to Compliance	01-JUL-2003	30-SEP-2003	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7119703	Returned to Compliance	01-APR-2003	30-JUN-2003	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7119403	Returned to Compliance	01-JAN-2003	31-MAR-2003	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7119103	Returned to Compliance	01-OCT-2002	31-DEC-2002	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	4417899	Returned to Compliance	01-JAN-1999	30-SEP-2002	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	4274799	Returned to Compliance	01-OCT-1998	30-SEP-2002	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	3106195	Known	01-AUG-1995	31-AUG-1995	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	5387495	Returned to Compliance	01-FEB-1995	31-DEC-1998	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	2874395	Returned to Compliance	01-JAN-1995	31-DEC-1998	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1295591	Returned to Compliance	18-JAN-1991	17-JAN-1995	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7118980	Known	30-JUN-1977	29-JUN-1981	No

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
4950206	7125506	SIF	State Public Notification received	13-FEB-2006	State	-
4950206	7125406	SIF	State Public Notification received	13-FEB-2006	State	-
4950106	7119703	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7125206	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7124805	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	1295591	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	2874395	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	4274799	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	4417899	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	5387495	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7119103	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7125306	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7120004	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7120304	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7120904	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7121204	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7121505	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7121705	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7124105	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7124205	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4950106	7124705	SOX	State Compliance achieved	27-JAN-2006	State	RAA beneath MCL's.
4947705	7124405	SIA	State Violation/Reminder Notice	16-MAY-2005	State	-
4947705	7124505	SIA	State Violation/Reminder Notice	16-MAY-2005	State	-
4936596	3106195	SIE	State Public Notification requested	28-OCT-1995	State	-

1 - 24 of 24

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 1 (20542) ABANDONED	20250	Yes	Well	Ground water	Other	Inactive
WELL 12 (01901)	40297	Yes	Well	Ground water	Permanent	Active
WELL 7 (20547)	20255	Yes	Well	Ground water	Permanent	Active
WELL 6 (20546)	20254	Yes	Well	Ground water	Permanent	Active
WELL 5 (20545)	20253	Yes	Well	Ground water	Permanent	Active
WELL 3 (20543)	20251	Yes	Well	Ground water	Permanent	Active
WELL 11 (01030)	18828	Yes	Well	Ground water	Permanent	Active
WELL 10 (01029)	18827	Yes	Well	Ground water	Permanent	Active
WELL 9 (00788)	18594	Yes	Well	Ground water	Permanent	Active
WELL 8 (00337)	18157	Yes	Well	Ground water	Permanent	Active
WELL 4 (20544) ABANDONED	20252	Yes	Well	Ground water	Other	Inactive
WEST CHICAGO	23596	No	Distribution System/Zone	-	-	Active
SSS	35480	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	46119	No	Distribution System/Zone	-	-	Active
CHILD CARE FACILITY LEAD SAMPLING	46121	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	27255	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	29677	No	Sampling Station	-	-	Active
GR12 - TWO 1.15 MG GSRS AT TP12	40647	No	Storage	-	-	Active
ELEV1-250K GALLON ELEVATED TANK	44278	No	Storage	-	-	Active
ELEV2-500K GALLON ELEVATED TANK	44281	No	Storage	-	-	Active
GR13-500K GROUND STORAGE AT PF13	44282	No	Storage	-	-	Active
GR14-500K GROUND STORAGE AT PF14	44283	No	Storage	-	-	Active
DISTRIBUTION ELEVATED STORAGE	11096	No	Storage	-	-	Inactive
DISTRIBUTION GROUND STORAGE	12136	No	Storage	-	-	Inactive
TAP 09 GROUND STORAGE	12732	No	Storage	-	-	Inactive
TP 02-WELL 3 (EMERGENCY)	15253	No	Treatment Plant	-	-	Active
TP 04-WELL 5 (EMERGENCY)	15255	No	Treatment Plant	-	-	Active
TP 05-WELL 6 (EMERGENCY)	15256	No	Treatment Plant	-	-	Active
TP 07-WELL 8 (EMERGENCY)	15258	No	Treatment Plant	-	-	Active
TP 08-WELL 9 (EMERGENCY)	15259	No	Treatment Plant	-	-	Active
TP 10-WELL 10 (EMERGENCY)	32323	No	Treatment Plant	-	-	Active
TP 11-WELL 11 (EMERGENCY)	32324	No	Treatment Plant	-	-	Active
TP 12-LIME SOFTENING PLANT	34190	No	Treatment Plant	-	-	Active
TP 01-WELL 1 (ABANDONED)	15252	No	Treatment Plant	-	-	Inactive
TP 03-WELL 4 (ABANDONED)	15254	No	Treatment Plant	-	-	Inactive
TP 06-WELL 7 (EMERGENCY)	15257	No	Treatment Plant	-	-	Inactive
TP 09-WELLS 8 AND 9 (INACTIVE)	15260	No	Treatment Plant	-	-	Inactive

1 - 37 of 37

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 02-WELL 3 (EMERGENCY)	15253	Hypochlorination, Pre	Disinfection
TP 04-WELL 5 (EMERGENCY)	15255	Gaseous Chlorination, Pre	Disinfection
TP 05-WELL 6 (EMERGENCY)	15256	Gaseous Chlorination, Pre	Disinfection
TP 07-WELL 8 (EMERGENCY)	15258	Gaseous Chlorination, Pre	Disinfection
TP 07-WELL 8 (EMERGENCY)	15258	Gaseous Chlorination, Pre	Iron removal
TP 08-WELL 9 (EMERGENCY)	15259	Gaseous Chlorination, Pre	Disinfection
TP 10-WELL 10 (EMERGENCY)	32323	Gaseous Chlorination, Pre	Disinfection
TP 11-WELL 11 (EMERGENCY)	32324	Gaseous Chlorination, Pre	Disinfection
TP 12-LIME SOFTENING PLANT	34190	Flocculation	Radionuclides removal
TP 12-LIME SOFTENING PLANT	34190	Rapid Mix	Softening (hardness removal)
TP 12-LIME SOFTENING PLANT	34190	Sedimentation	Softening (hardness removal)
TP 12-LIME SOFTENING PLANT	34190	Lime - Soda Ash Addition	Radionuclides removal
TP 12-LIME SOFTENING PLANT	34190	Lime - Soda Ash Addition	Softening (hardness removal)
TP 12-LIME SOFTENING PLANT	34190	Aeration, Slat Tray	Taste / odor control
TP 12-LIME SOFTENING PLANT	34190	Hypochlorination, Pre	Disinfection
TP 12-LIME SOFTENING PLANT	34190	Fluoridation	Other
TP 12-LIME SOFTENING PLANT	34190	Coagulation	Radionuclides removal
TP 12-LIME SOFTENING PLANT	34190	Coagulation	Softening (hardness removal)
TP 12-LIME SOFTENING PLANT	34190	Coagulation	Radionuclides removal
TP 12-LIME SOFTENING PLANT	34190	Coagulation	Softening (hardness removal)
TP 12-LIME SOFTENING PLANT	34190	pH Adjustment, Post	Corrosion control
TP 12-LIME SOFTENING PLANT	34190	Filtration, Rapid Sand	Radionuclides removal

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For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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