Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MA3023002
PWS Name	HANSCOM AFB
PWS Type	Community water system
Owner Type	Federal government
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	Yes
Population Served	11789
County Served	Middlesex

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 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	16	Known	01-OCT-2020	31-DEC-2020	No
TT	Treatment Technique, Level 2 Assessment (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	14	Returned to Compliance	01-OCT-2019	-	Yes
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	13	Returned to Compliance	01-JUL-2017	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	12	Known	01-AUG-2015	31-AUG-2015	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	11	Known	01-APR-2015	30-APR-2015	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	10	Known	01-NOV-2014	30-NOV-2014	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9	Known	01-SEP-2014	30-SEP-2014	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8	Returned to Compliance	01-SEP-2013	30-SEP-2013	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	7	Returned to Compliance	01-AUG-2013	31-AUG-2013	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	6	Returned to Compliance	01-OCT-2012	31-OCT-2012	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	5	Returned to Compliance	01-SEP-2012	30-SEP-2012	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	4	Returned to Compliance	01-AUG-2012	31-AUG-2012	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	3	Returned to Compliance	01-JUL-2012	31-JUL-2012	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	2	Returned to Compliance	01-DEC-2011	31-DEC-2011	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	1	Returned to Compliance	01-JAN-2010	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	05V0001	Known	01-FEB-2005	28-FEB-2005	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	96V0001	Known	01-SEP-1995	30-SEP-1995	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	95V0001	Known	01-OCT-1994	31-OCT-1994	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	94V0001	Known	01-JUL-1994	31-JUL-1994	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9240002	Known	01-AUG-1992	31-AUG-1992	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	9240001	Known	01-JUL-1992	31-JUL-1992	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9230002	Known	01-JUN-1992	30-JUN-1992	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	9230001	Known	01-MAY-1992	31-MAY-1992	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9130001	Known	01-APR-1991	30-APR-1991	Yes

1 - 24 of 24

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
30	16	SFL	State Administrative/Compliance Order without penalty issued	01-MAR-2021	State	DIDN'T COLLECT HAA5 SAMPLE
31	14	SOX	State Compliance achieved	13-DEC-2019	State	RTC FOR OCT 2019 RTCR VIOLATION
31	13	SOX	State Compliance achieved	13-DEC-2019	State	RTC FOR OCT 2019 RTCR VIOLATION
24	12	SFL	State Administrative/Compliance Order without penalty issued	10-SEP-2015	State	TCR MONTHLY MCL VIOLATION FOR AUGUST 2015
23	11	SFL	State Administrative/Compliance Order without penalty issued	13-MAY-2015	State	TCR MONTHLY MCL VIOLATION FOR APRIL 2015
22	10	SFL	State Administrative/Compliance Order without penalty issued	15-DEC-2014	State	TCR MONTHLY MCL VIOLATION NOV. 2014 & SAMPLING ON ONLY 1 DATE
19	9	SFJ	State Formal Notice of Violation issued	09-OCT-2014	State	TCR MONTHLY MCL VIOLATION FOR SEPTEMBER 2014
21	8	SOX	State Compliance achieved	01-JAN-2014	State	RTC PDU for EPA
21	7	SOX	State Compliance achieved	01-JAN-2014	State	RTC PDU for EPA
20	6	SOX	State Compliance achieved	01-DEC-2012	State	RTC PDU for EPA
20	5	SOX	State Compliance achieved	01-DEC-2012	State	RTC PDU for EPA
20	4	SOX	State Compliance achieved	01-DEC-2012	State	RTC PDU for EPA
20	3	SOX	State Compliance achieved	01-DEC-2012	State	RTC PDU for EPA
25	2	SOX	State Compliance achieved	31-JAN-2012	State	EPA RTC
12	1	SOX	State Compliance achieved	27-JUL-2010	State	-
8	05V0001	SFL	State Administrative/Compliance Order without penalty issued	29-MAR-2005	State	-
6	96V0001	SIE	State Public Notification requested	02-OCT-1995	State	COMPLIANCE ACHIEVED
5	95V0001	SIE	State Public Notification requested	10-NOV-1994	State	COMPLIANCE ACHIEVED ON 14-NOV-94
9240002	9240001	SFL	State Administrative/Compliance Order without penalty issued	29-OCT-1992	State	-
9240002	9230002	SFL	State Administrative/Compliance Order without penalty issued	29-OCT-1992	State	-
9240002	9230001	SFL	State Administrative/Compliance Order without penalty issued	29-OCT-1992	State	-
9240002	9240002	SFL	State Administrative/Compliance Order without penalty issued	29-OCT-1992	State	-

1 - 22 of 22

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
BEDFORD / MWRA SUPPLY	2	Yes	Consecutive Connection	Ground water	Permanent	Active
LEXINGTON SUPPLY	3	Yes	Consecutive Connection	Surface water	Permanent	Active
LEXINGTON / MWRA	4	Yes	Consecutive Connection	Surface water	Permanent	Active
B 1117	1	No	Storage	-	-	Inactive

1 - 4 of 4

Treatment Processes

No treatment process(es) found. EPA has no record of treatment process(es) reported by the primacy agency for this water system.

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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