U.S. flag

An official website of the United States government

Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDMA3155000
PWS NameLEXINGTON WATER DEPT. (MWRA)
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceSurface water purchased
Primacy TypeState
Is Wholesaler?Yes
Population Served34074
County ServedMiddlesex

Note


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.

PWS Violation


Violations

Violation Category CodeViolation Type DescriptionRule NameContaminant NameViolation IDCompliance Status DescriptionCompliance Period Begin DateCompliance Period End DateIs Health Based Ind
MRLead Consumer NoticeLead and Copper RuleLead and Copper Rule2Open01-JAN-2025 - No
MRLead Consumer NoticeLead and Copper RuleLead and Copper Rule1Open01-JUL-2024 - No
TTPublic EducationLead and Copper RuleLead and Copper Rule00V0001Returned to Compliance01-JAN-1999 - Yes
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)94V0001Known01-AUG-199431-AUG-1994Yes
TTPublic EducationLead and Copper RuleLead and Copper Rule95V0001Returned to Compliance01-JAN-1994 - Yes
TTPublic EducationLead and Copper RuleLead and Copper Rule95V0003Returned to Compliance01-JAN-1993 - Yes
TTPublic EducationLead and Copper RuleLead and Copper Rule95V0002Returned to Compliance01-JAN-1992 - Yes
TTFailure to Filter (SWTR)Surface Water Treatment RuleSurface Water Treatment Rule9799999Known01-JAN-199205-MAY-2000Yes
MCLMaximum Contaminant Level Violation, Acute (TCR)Total Coliform RuleColiform (TCR)9140001Known01-AUG-199131-AUG-1991Yes
  • 1 - 9 of 9

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
122SFLState Administrative/Compliance Order without penalty issued11-MAR-2026StateFAILURE TO PROVIDE CONSUMER NOTICE WITHIN 30 DAYS
101SFLState Administrative/Compliance Order without penalty issued21-FEB-2025StateFAILURE TO PROVIDE CONSUMER NOTICE WITHIN 30 DAYS OF RESULT RECIPT FROM LAB
500V0001SOXState Compliance achieved01-APR-2000State -
495V0001SOXState Compliance achieved16-MAR-1995State -
495V0002SOXState Compliance achieved16-MAR-1995State -
495V0003SOXState Compliance achieved16-MAR-1995State -
97999999799999SFLState Administrative/Compliance Order without penalty issued29-JUN-1993ODSWeb -
91400029140001SIFState Public Notification received01-OCT-1991State -
  • 1 - 8 of 8

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
MWRA SUPPLY1YesConsecutive ConnectionSurface waterPermanentActive
MORGAN ROAD STORAGE FACILITY2NoStorage - - Active
MOPRGAN ROAD STORAGE TANK3NoStorage - - Active
  • 1 - 3 of 3

PWS Treatment Processes


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.