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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
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	2720	Returned to Compliance	01-JAN-2017	31-DEC-2017	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	2715	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	2716	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	1707	Returned to Compliance	01-JAN-2007	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	1306	Returned to Compliance	01-JAN-2006	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	1206	Returned to Compliance	01-JAN-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	1006	Returned to Compliance	01-JAN-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	906	Returned to Compliance	01-JAN-2005	31-DEC-2005	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	203	Returned to Compliance	01-MAY-2002	31-MAY-2002	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	102	Returned to Compliance	01-JAN-2001	31-DEC-2001	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	4583	Known	30-APR-1983	29-APR-1984	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	4883	Known	30-APR-1983	29-APR-1984	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	4683	Known	30-APR-1983	29-APR-1984	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	4783	Known	30-APR-1983	29-APR-1984	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	4983	Known	30-APR-1983	29-APR-1984	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	5183	Known	30-APR-1983	29-APR-1984	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	5283	Known	30-APR-1983	29-APR-1984	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	5383	Known	30-APR-1983	29-APR-1984	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	5883	Known	01-MAY-1980	29-APR-1983	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	5783	Known	01-MAY-1980	29-APR-1983	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	5683	Known	01-MAY-1980	29-APR-1983	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	5583	Known	01-MAY-1980	29-APR-1983	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	5983	Known	01-MAY-1980	29-APR-1983	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	6083	Known	01-MAY-1980	29-APR-1983	No

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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
5539	2720	SOX	State Compliance achieved	21-NOV-2017	State	-
5533	2715	SOX	State Compliance achieved	02-DEC-2014	State	-
5534	2716	SOX	State Compliance achieved	02-DEC-2014	State	-
5511	1707	SOX	State Compliance achieved	07-DEC-2007	State	-
5512	1306	SOX	State Compliance achieved	26-JUN-2007	State	-
3506	906	SOX	State Compliance achieved	30-AUG-2006	State	-
3506	1006	SOX	State Compliance achieved	30-AUG-2006	State	-
5513	1206	SOX	State Compliance achieved	25-AUG-2006	State	-
502	203	SFJ	State Formal Notice of Violation issued	21-AUG-2002	State	Old External System Number: 98437
302	102	SFJ	State Formal Notice of Violation issued	21-MAY-2002	State	Old External System Number: 87578

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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
XINACTIVE) BILLINGS RESERVOIR (UPPER)	31953	Yes	Intake	Surface water	Permanent	Inactive
DRILLED WELL #2, 8", 50', 20 HP	28684	Yes	Well	Ground water	Permanent	Active
DRILLED WELL #1, 8", 50', 20 HP	28683	Yes	Well	Ground water	Permanent	Active
XINACTIVE (AUX) SIMPSON'S SPRING (LOWER)	49712	Yes	Intake	Surface water	Permanent	Inactive
XINACTIVE) BILLINGS RESERVOIR (UPPER)	49711	Yes	Intake	Surface water	Permanent	Inactive
XINACTIVE (AUX) SIMPSON'S SPRING (LOWER)	31954	Yes	Intake	Surface water	Permanent	Inactive
COMMON HEADER FOR BOTH WELLS	64067	No	Common Headers	-	-	Active
DISTRIBUTION SYSTEM	43543	No	Distribution System/Zone	-	-	Active
XXXIDSE DISTRIBUTION SYSTEM	75721	No	Distribution System/Zone	-	-	Inactive
76,300 GALLON STORAGE TANK	44279	No	Storage	-	-	Active
145,270-GALLON STORAGE TANK - HOSPITAL	92311	No	Storage	-	-	Active
TRASMISSION MAIN (CONTACT TIME)	64068	No	Transmission Main (Manifold)	-	-	Active
TRANSMISSION MAIN FROM TANK TO DS-01	80836	No	Transmission Main (Manifold)	-	-	Active
CAMBRIDGE WTP - CHLORINE & CORR. CTL	3313	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
CAMBRIDGE WTP - CHLORINE & CORR. CTL	3313	Inhibitor, Orthophosphate	Corrosion control
CAMBRIDGE WTP - CHLORINE & CORR. CTL	3313	Hypochlorination, Pre	Disinfection

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