Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	IL1970250
PWS Name	CREST HILL
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	21169
County Served	Will

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
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	7177272	Returned to Compliance	01-OCT-2025	31-OCT-2025	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	7177271	Returned to Compliance	01-OCT-2025	31-OCT-2025	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	7177270	Open	12-JUL-2025	-	No
RPT	Notification, Known or Potential LSL	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	7177268	Open	02-JUL-2025	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	7177269	Open	01-JUL-2025	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	7177264	Returned to Compliance	23-FEB-2025	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	7177259	Returned to Compliance	13-JUL-2024	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	7177265	Open	01-JUL-2024	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	7177258	Returned to Compliance	01-JUL-2024	-	No
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	7177263	Returned to Compliance	02-JAN-2024	-	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	7177255	Returned to Compliance	01-JUL-2023	30-SEP-2023	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	7177254	Returned to Compliance	01-JUL-2023	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	7177256	Returned to Compliance	01-JUL-2023	30-SEP-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	7177274	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	7177289	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	7177275	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	7177287	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	7177273	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	7177286	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	7177283	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	7177279	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	7177284	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	7177280	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	7177294	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	7177291	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	7177292	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	7177293	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	7177277	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	7177282	Known	01-JAN-2023	31-DEC-2025	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	7177248	Returned to Compliance	01-OCT-2021	31-OCT-2021	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	7177249	Returned to Compliance	01-OCT-2021	31-DEC-2021	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	7177246	Returned to Compliance	01-SEP-2021	30-SEP-2021	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	7177247	Returned to Compliance	01-JUL-2021	30-SEP-2021	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7177253	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	7177252	Known	01-JAN-2020	31-DEC-2022	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	7177238	Returned to Compliance	01-DEC-2019	31-DEC-2019	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	7177236	Returned to Compliance	01-NOV-2019	30-NOV-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	7177239	Returned to Compliance	01-OCT-2019	31-DEC-2019	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	7177234	Returned to Compliance	01-DEC-2018	31-DEC-2018	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	7177233	Returned to Compliance	16-OCT-2018	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	7177235	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	7177232	Returned to Compliance	01-JUL-2018	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	7177228	Returned to Compliance	01-NOV-2016	31-OCT-2017	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	7177229	Returned to Compliance	01-NOV-2016	31-OCT-2017	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	7177222	Returned to Compliance	01-JUL-2016	30-SEP-2016	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	7177221	Returned to Compliance	01-JUL-2016	31-JUL-2016	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	7177220	Returned to Compliance	01-JUN-2016	30-JUN-2016	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	7177219	Returned to Compliance	01-APR-2016	30-JUN-2016	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	7177212	Returned to Compliance	01-JUL-2013	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	7177006	Returned to Compliance	01-OCT-2005	-	No

1 - 50 of 82

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
7763921	7177272	SIE	State Public Notification requested	16-DEC-2025	State	-
7763919	7177271	SIE	State Public Notification requested	16-DEC-2025	State	-
7763917	7177270	SIA	State Violation/Reminder Notice	26-AUG-2025	State	-
7763916	7177269	SIA	State Violation/Reminder Notice	22-AUG-2025	State	-
7763915	7177268	SIE	State Public Notification requested	03-JUL-2025	State	-
7763913	7177263	SIF	State Public Notification received	27-MAR-2025	State	-
7763911	7177265	SIA	State Violation/Reminder Notice	27-MAR-2025	State	-
7763912	7177264	SOX	State Compliance achieved	25-MAR-2025	State	-
7763908	7177258	SOX	State Compliance achieved	30-DEC-2024	State	-
7763905	7177256	SIF	State Public Notification received	11-OCT-2024	State	-
7763905	7177255	SIF	State Public Notification received	11-OCT-2024	State	-
7763904	7177254	SIF	State Public Notification received	08-OCT-2024	State	-
7763902	7177259	SIA	State Violation/Reminder Notice	22-AUG-2024	State	-
7763888	7177253	SOX	State Compliance achieved	21-JUL-2023	State	-
7763891	7177252	SIF	State Public Notification received	06-JUL-2023	State	-
7763881	7177249	SIF	State Public Notification received	27-MAY-2022	State	-
7763880	7177247	SIF	State Public Notification received	27-MAY-2022	State	-
7763878	7177246	SIF	State Public Notification received	27-MAY-2022	State	-
7763879	7177248	SIF	State Public Notification received	27-MAY-2022	State	-
7763850	7177238	SIF	State Public Notification received	05-JUN-2020	State	-
7763849	7177239	SIF	State Public Notification received	05-JUN-2020	State	-
7763848	7177236	SOX	State Compliance achieved	11-FEB-2020	State	-
7763838	7177235	SIF	State Public Notification received	15-JUL-2019	State	-
7763839	7177234	SIF	State Public Notification received	15-JUL-2019	State	-
7763832	7177228	SOX	State Compliance achieved	12-DEC-2018	State	-
7763832	7177229	SOX	State Compliance achieved	12-DEC-2018	State	-
7763830	7177233	SOX	State Compliance achieved	24-OCT-2018	State	11/01/2018: Part of results received late. JL
7763827	7177232	SOX	State Compliance achieved	31-JUL-2018	State	-
7763819	7177221	SIF	State Public Notification received	02-AUG-2017	State	-
7763821	7177220	SIF	State Public Notification received	02-AUG-2017	State	-
7763820	7177219	SIF	State Public Notification received	02-AUG-2017	State	-
7763818	7177222	SIF	State Public Notification received	02-AUG-2017	State	-
7763808	7177212	SOX	State Compliance achieved	31-JUL-2013	State	-
7763806	7177006	SIF	State Public Notification received	10-JUL-2006	State	-
599301	5350201	SIE	State Public Notification requested	15-JUN-2001	State	-
490101	5315901	SIE	State Public Notification requested	15-MAR-2001	State	-
7762799	4376099	SIE	State Public Notification requested	15-DEC-1998	State	-
7762599	4226798	SIE	State Public Notification requested	15-OCT-1998	State	-
1E96	2199093	EFJ	Federal issued Formal Notice of Violation	31-OCT-1995	ODSWeb	RS
4624495	3053595	SIE	State Public Notification requested	10-JUN-1995	State	-
4624495	3053695	SIE	State Public Notification requested	10-JUN-1995	State	-
4624495	3053795	SIE	State Public Notification requested	10-JUN-1995	State	-
4268195	2541293	SOX	State Compliance achieved	23-JAN-1995	State	-
2003093	1866593	SIE	State Public Notification requested	19-JUN-1993	State	-
2003093	1866493	SIE	State Public Notification requested	19-JUN-1993	State	-
2003593	1782392	SOX	State Compliance achieved	17-MAR-1993	State	-
1662092	1497092	SIE	State Public Notification requested	01-JAN-1992	State	-
1662092	1496992	SIE	State Public Notification requested	01-JAN-1992	State	-
875491	1312591	SIE	State Public Notification requested	21-MAR-1991	State	-
1660290	1434090	SIE	State Public Notification requested	01-JUL-1990	State	-

1 - 50 of 63

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 3 (20448) ABANDONED	20160	Yes	Well	Ground water	Other	Inactive
WELL 12 (WL02008)	40674	Yes	Well	Ground water	Permanent	Active
WELL 11 (01361)	32305	Yes	Well	Ground water	Permanent	Active
WELL 10 (01360)	32304	Yes	Well	Ground water	Permanent	Active
WELL 7 (20451)	20163	Yes	Well	Ground water	Permanent	Active
WELL 4 (20449)	20161	Yes	Well	Ground water	Permanent	Active
WELL 1 (20447)	20159	Yes	Well	Ground water	Permanent	Active
WELL 9 (01200)	18994	Yes	Well	Ground water	Permanent	Active
WELL 8 (01050)	18846	Yes	Well	Ground water	Permanent	Active
WELL6 (20450)-ABANDONED	20162	Yes	Well	Ground water	Other	Inactive
CREST HILL	25274	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	46937	No	Distribution System/Zone	-	-	Active
CHILDCARE FACILITY LEAD SAMPLING	46938	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	28933	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	31355	No	Sampling Station	-	-	Active
WATER QUALITY SAMPLING	43987	No	Sampling Station	-	-	Active
WATER QUALITY SAMPLING	43988	No	Sampling Station	-	-	Active
WATER QUALITY SAMPLING	43989	No	Sampling Station	-	-	Active
WATER QUALITY SAMPLING	43990	No	Sampling Station	-	-	Active
WATER QUALITY SAMPLING	43991	No	Sampling Station	-	-	Active
WATER QUALITY SAMPLING	43992	No	Sampling Station	-	-	Active
WATER QUALITY SAMPLING	43993	No	Sampling Station	-	-	Active
ELEV09-1.5 MG ELEVATED TANK AT TP07	44128	No	Storage	-	-	Active
ELEV01-0.300 MG ELEVATED TANK AT TP01	44129	No	Storage	-	-	Active
ELEV06-0.300 MG ELEVATED TANK AT TP06	44130	No	Storage	-	-	Active
DISTRIBUTION ELEVATED STORAGE	11874	No	Storage	-	-	Inactive
TP 07-WELLS 9,12 IRON FILTRATION	17529	No	Treatment Plant	-	-	Active
TP 01-WELL 1 TREATMENT	17530	No	Treatment Plant	-	-	Active
TP 03-WELL 4 IRON FILTRATION TREATMENT	17532	No	Treatment Plant	-	-	Active
TP 05-WELL 7 TREATMENT	17534	No	Treatment Plant	-	-	Active
TP 06-WELL 8 IRON FILTRATION TREATMENT	17535	No	Treatment Plant	-	-	Active
TP 08-WELL 10 IRON FILTRATION TREATMENT	33289	No	Treatment Plant	-	-	Active
TP 09-WELL 11 IRON FILTRATION TREATMENT	33290	No	Treatment Plant	-	-	Active
TP 02-WELL 3 (ABANDONED)	17531	No	Treatment Plant	-	-	Inactive
TP 04-WELL 6 ABANDONDED	17533	No	Treatment Plant	-	-	Inactive

1 - 35 of 35

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 07-WELLS 9,12 IRON FILTRATION	17529	Inhibitor, Polyphosphate	Corrosion control
TP 07-WELLS 9,12 IRON FILTRATION	17529	Fluoridation	Other
TP 07-WELLS 9,12 IRON FILTRATION	17529	Aeration, Packed Tower	Iron removal
TP 07-WELLS 9,12 IRON FILTRATION	17529	Filtration, Rapid Sand	Iron removal
TP 07-WELLS 9,12 IRON FILTRATION	17529	Hypochlorination, Pre	Iron removal
TP 07-WELLS 9,12 IRON FILTRATION	17529	Hypochlorination, Post	Disinfection
TP 01-WELL 1 TREATMENT	17530	Fluoridation	Other
TP 01-WELL 1 TREATMENT	17530	Hypochlorination, Post	Disinfection
TP 01-WELL 1 TREATMENT	17530	Sequestration	Iron removal
TP 03-WELL 4 IRON FILTRATION TREATMENT	17532	Fluoridation	Other
TP 03-WELL 4 IRON FILTRATION TREATMENT	17532	Aeration, Packed Tower	Iron removal
TP 03-WELL 4 IRON FILTRATION TREATMENT	17532	Filtration, Rapid Sand	Iron removal
TP 03-WELL 4 IRON FILTRATION TREATMENT	17532	Gaseous Chlorination, Post	Disinfection
TP 03-WELL 4 IRON FILTRATION TREATMENT	17532	Gaseous Chlorination, Pre	Disinfection
TP 03-WELL 4 IRON FILTRATION TREATMENT	17532	Gaseous Chlorination, Pre	Iron removal
TP 03-WELL 4 IRON FILTRATION TREATMENT	17532	Sequestration	Iron removal
TP 04-WELL 6 ABANDONDED	17533	Fluoridation	Other
TP 04-WELL 6 ABANDONDED	17533	Gaseous Chlorination, Pre	Disinfection
TP 04-WELL 6 ABANDONDED	17533	Fluoridation	Disinfection
TP 04-WELL 6 ABANDONDED	17533	Gaseous Chlorination, Pre	Iron removal
TP 04-WELL 6 ABANDONDED	17533	Sequestration	Iron removal
TP 05-WELL 7 TREATMENT	17534	Fluoridation	Other
TP 05-WELL 7 TREATMENT	17534	Gaseous Chlorination, Pre	Disinfection
TP 05-WELL 7 TREATMENT	17534	Sequestration	Iron removal
TP 06-WELL 8 IRON FILTRATION TREATMENT	17535	Fluoridation	Other
TP 06-WELL 8 IRON FILTRATION TREATMENT	17535	Aeration, Packed Tower	Iron removal
TP 06-WELL 8 IRON FILTRATION TREATMENT	17535	Filtration, Rapid Sand	Iron removal
TP 06-WELL 8 IRON FILTRATION TREATMENT	17535	Gaseous Chlorination, Post	Disinfection
TP 06-WELL 8 IRON FILTRATION TREATMENT	17535	Gaseous Chlorination, Pre	Disinfection
TP 06-WELL 8 IRON FILTRATION TREATMENT	17535	Gaseous Chlorination, Pre	Iron removal
TP 06-WELL 8 IRON FILTRATION TREATMENT	17535	Sequestration	Iron removal
TP 08-WELL 10 IRON FILTRATION TREATMENT	33289	Fluoridation	Other
TP 08-WELL 10 IRON FILTRATION TREATMENT	33289	Inhibitor, Polyphosphate	Corrosion control
TP 08-WELL 10 IRON FILTRATION TREATMENT	33289	Aeration, Packed Tower	Iron removal
TP 08-WELL 10 IRON FILTRATION TREATMENT	33289	Filtration, Rapid Sand	Iron removal
TP 08-WELL 10 IRON FILTRATION TREATMENT	33289	Sequestration	Iron removal
TP 08-WELL 10 IRON FILTRATION TREATMENT	33289	Hypochlorination, Pre	Iron removal
TP 08-WELL 10 IRON FILTRATION TREATMENT	33289	Hypochlorination, Post	Disinfection
TP 09-WELL 11 IRON FILTRATION TREATMENT	33290	Fluoridation	Other
TP 09-WELL 11 IRON FILTRATION TREATMENT	33290	Aeration, Packed Tower	Iron removal
TP 09-WELL 11 IRON FILTRATION TREATMENT	33290	Filtration, Rapid Sand	Iron removal
TP 09-WELL 11 IRON FILTRATION TREATMENT	33290	Sequestration	Iron removal
TP 09-WELL 11 IRON FILTRATION TREATMENT	33290	Hypochlorination, Pre	Iron removal
TP 09-WELL 11 IRON FILTRATION TREATMENT	33290	Hypochlorination, Post	Disinfection

1 - 44 of 44

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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