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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.

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Violations

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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
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	7032615	Returned to Compliance	19-AUG-2016	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7032616	Returned to Compliance	01-JUL-2016	30-SEP-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7032613	Returned to Compliance	01-APR-2016	30-JUN-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7032612	Returned to Compliance	01-JAN-2016	31-MAR-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7032611	Returned to Compliance	01-OCT-2015	31-DEC-2015	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	7032609	Returned to Compliance	01-JUL-2012	30-SEP-2012	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	5364601	Returned to Compliance	01-JAN-2001	31-MAR-2001	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	3240696	Returned to Compliance	09-NOV-1995	09-APR-1996	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	2982495	Returned to Compliance	07-JUN-1995	18-DEC-1995	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1513792	Returned to Compliance	01-APR-1992	31-MAR-1996	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	1182290	Returned to Compliance	01-MAY-1990	30-APR-1994	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	527788	Returned to Compliance	01-APR-1988	31-MAR-1992	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	246486	Returned to Compliance	29-MAY-1986	28-MAY-1990	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	246584	Returned to Compliance	16-APR-1984	15-APR-1988	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7032080	Known	30-JUN-1977	29-JUN-1981	No

• 1 - 15 of 15

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Enforcement Actions

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Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9999900000000000001	7032611	EOX	Federal Compliance achieved	08-MAY-2020	ODSWeb	Administrative Order Termination letter for AO issued in 2016, docket number 1600005. Village of Cambridge in IL, Radium MCL, DW
9999900000000000001	7032613	EOX	Federal Compliance achieved	08-MAY-2020	ODSWeb	Administrative Order Termination letter for AO issued in 2016, docket number 1600005. Village of Cambridge in IL, Radium MCL, DW
9999900000000000001	7032616	EOX	Federal Compliance achieved	08-MAY-2020	ODSWeb	Administrative Order Termination letter for AO issued in 2016, docket number 1600005. Village of Cambridge in IL, Radium MCL, DW
9999900000000000001	7032612	EOX	Federal Compliance achieved	08-MAY-2020	ODSWeb	Administrative Order Termination letter for AO issued in 2016, docket number 1600005. Village of Cambridge in IL, Radium MCL, DW
5561519	7032615	SOX	State Compliance achieved	07-OCT-2016	State	-
5561506	7032609	SOX	State Compliance achieved	30-OCT-2012	State	Sample 2703922 collected 09/04/12 and submitted 10/30/12.
614501	5364601	SOX	State Compliance achieved	30-JUN-2001	State	-
5560096	3240696	SOX	State Compliance achieved	09-APR-1996	State	-
5258896	2982495	SOX	State Compliance achieved	18-DEC-1995	State	-
1748993	1513792	SOX	State Compliance achieved	18-MAR-1993	State	-
1748993	527788	SOX	State Compliance achieved	18-MAR-1993	State	-
1748993	246584	SOX	State Compliance achieved	18-MAR-1993	State	-
845391	246486	SOX	State Compliance achieved	15-MAR-1991	State	-
845391	1182290	SOX	State Compliance achieved	15-MAR-1991	State	-

• 1 - 14 of 14

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All Facilities

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Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 2 (31713)	20924	Yes	Well	Ground water	Permanent	Active
WELL 3 (31714)	20925	Yes	Well	Ground water	Permanent	Active
CAMBRIDGE	23843	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	46039	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	27502	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	29924	No	Sampling Station	-	-	Active
GROUND TANK - 80,000 GAL	44635	No	Storage	-	-	Active
ELEVATED TANK - 300,000 GAL	44636	No	Storage	-	-	Active
DISTRIBUTION ELEVATED STORAGE	11230	No	Storage	-	-	Inactive
DISTRIBUTION GROUND STORAGE	12198	No	Storage	-	-	Inactive
TP 01 GROUND STORAGE	12804	No	Storage	-	-	Inactive
TP 01-WELL #2 & #3 HMO FILTER (RAD & FE)	15555	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 01-WELL #2 & #3 HMO FILTER (RAD & FE)	15555	Gaseous Chlorination, Pre	Taste / odor control
TP 01-WELL #2 & #3 HMO FILTER (RAD & FE)	15555	Aeration, Packed Tower	Taste / odor control
TP 01-WELL #2 & #3 HMO FILTER (RAD & FE)	15555	Gaseous Chlorination, Post	Disinfection
TP 01-WELL #2 & #3 HMO FILTER (RAD & FE)	15555	Filtration, Greensand	Radionuclides removal
TP 01-WELL #2 & #3 HMO FILTER (RAD & FE)	15555	Gaseous Chlorination, Pre	Disinfection
TP 01-WELL #2 & #3 HMO FILTER (RAD & FE)	15555	Gaseous Chlorination, Pre	Iron removal
TP 01-WELL #2 & #3 HMO FILTER (RAD & FE)	15555	Inhibitor, Orthophosphate	Corrosion control

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