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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	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	6	Open	01-JAN-2025	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	5	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	3	Returned to Compliance	01-JAN-2009	31-JAN-2009	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	4	Returned to Compliance	01-JAN-2009	-	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	2	Known	01-JAN-2008	31-MAR-2008	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	95V0001	Known	01-MAY-1995	31-MAY-1995	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	9220004	Returned to Compliance	01-JAN-1992	31-MAR-1992	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
18	6	SFL	State Administrative/Compliance Order without penalty issued	08-DEC-2025	State	FAILURE TO COLLECT FROM HIGHEST TIER SITES
16	5	SOX	State Compliance achieved	30-SEP-2012	State	EPA RTC - ADURHAM 8/3/2015
14	4	SOX	State Compliance achieved	17-NOV-2011	State	-
17	3	SOX	State Compliance achieved	26-FEB-2009	State	EPA RTC
8	2	SFL	State Administrative/Compliance Order without penalty issued	21-MAY-2008	State	MISSING RADIONUCLIDES FOR WELL#1 & #4 FOR 1QTR2008
3	95V0001	SFL	State Administrative/Compliance Order without penalty issued	10-JUL-1995	State	COMPLIANCE ACHIEVED
9240001	9220004	SOX	State Compliance achieved	01-JUN-1992	State	-

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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
BOMIL GP WELL #3	3	Yes	Well	Ground water	Emergency	Active
BOMIL GP WELL #4	4	Yes	Well	Ground water	Permanent	Active
BOMIL GP WELL #3A	22	Yes	Well	Ground water	Permanent	Active
BOMIL BEDROCK WELL #2	20	Yes	Well	Ground water	Permanent	Active
BOMIL GP WELL #2	2	Yes	Well	Ground water	Permanent	Active
BOMIL BEDROCK WELL #1	18	Yes	Well	Ground water	Permanent	Active
BOMIL GP WELL #1	1	Yes	Well	Ground water	Permanent	Active
BOMIL GP WELL # 4 PUMP STATION	10	No	Pump Facility	-	-	Active
BOMIL BEDROCK WELL #1 PUMP	19	No	Pump Facility	-	-	Active
BOMIL BEDROCK WELL #2 PUMP	21	No	Pump Facility	-	-	Active
BOMIL GP WELL #3A PUMP	23	No	Pump Facility	-	-	Active
BOMIL GP WELL #1 PUMP STATION	7	No	Pump Facility	-	-	Active
BOMIL GP WELL #2 PUMP STATION	8	No	Pump Facility	-	-	Active
BOMIL GP WELL #3 PUMP STATION	9	No	Pump Facility	-	-	Active
35 SWAIN ROAD TANK	11	No	Storage	-	-	Active
FINISH WATER TANK	17	No	Storage	-	-	Active
64 WASHINGTON STREET TANK	6	No	Storage	-	-	Active
BOMIL GP WELL # 3	14	No	Treatment Plant	-	-	Active
NORTH CHELMSFORD WATER TREATMENT FACILIT	16	No	Treatment Plant	-	-	Active
BOMIL GP WELL # 1	12	No	Treatment Plant	-	-	Inactive
BOMIL GP WELL # 2	13	No	Treatment Plant	-	-	Inactive
BOMIL GP WELL # 4	15	No	Treatment Plant	-	-	Inactive

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
NORTH CHELMSFORD WATER TREATMENT FACILIT	16	Filtration, Ultrafiltration	Particulate removal
NORTH CHELMSFORD WATER TREATMENT FACILIT	16	Activated Carbon, Granular	Disinfection by-products control
NORTH CHELMSFORD WATER TREATMENT FACILIT	16	pH Adjustment	Corrosion control
NORTH CHELMSFORD WATER TREATMENT FACILIT	16	pH Adjustment, Post	Corrosion control
NORTH CHELMSFORD WATER TREATMENT FACILIT	16	Hypochlorination, Post	Disinfection
NORTH CHELMSFORD WATER TREATMENT FACILIT	16	Chlorine Dioxide	Disinfection
NORTH CHELMSFORD WATER TREATMENT FACILIT	16	Coagulation	Particulate removal
NORTH CHELMSFORD WATER TREATMENT FACILIT	16	Aeration, Packed Tower	Iron removal

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