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Public water system record

Malden Water Division (MWRA)

Serves Malden, Middlesex County, MA · 66,263 people served

Federal records show 1 health-based violation and 3 monitoring/reporting issues for Malden Water Division (MWRA) in the last ten years. The most serious issue in this window was a resolved Stage 1 Disinfection Byproducts Rule violation.

  • MA3165000
  • MALDEN
  • MA
  • 66,263 served

System profile

Source water Purchased surface water
ZIP 02148
EPA system ID MA3165000

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
3

Key facts

  • Malden Water Division (MWRA) buys its water from MWRA.
  • Most recent formal enforcement: compliance order (no penalty) by Massachusetts, February 2023.
  • Record on file since 1991, with 20 health-based violations before October 19, 2016.
  • Lead pipe inventory: 2,460 lead and 689 unknown out of 11,336 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
 210 Mar 1, 2016 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Consumer Confidence Rule
OTHER
 Jun 8, 2022 Active
Lead and Copper Rule
Monitoring and reporting
 Jul 1, 2019 Active
Enforcement action in place
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2018 Active
Enforcement action in place

Full record since 1991

EPA's records for Malden Water Division (MWRA) go back to 1991. Before October 19, 2016 they list 20 health-based violations (8 resolved, 12 archived by EPA without a recorded fix) and no monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 18 0
2000s 1 0
2010 to October 18, 2016 1 0
October 19, 2016 to 2019 0 2
2020s 0 1

Most recent health-based violation before October 19, 2016: Stage 1 Disinfection Byproducts Rule, began March 2016, Resolved.

Show all 20 health-based violations before October 19, 2016
Contaminant Start date Status
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
 Mar 1, 2016 Resolved
Lead and Copper Rule
Treatment technique failure
 Jul 1, 2005 Resolved
Lead and Copper Rule
Treatment technique failure
 Jan 1, 1999 Resolved
Total Coliform
Contaminant limit exceeded
 Jul 1, 1997 Archived
Lead and Copper Rule
Treatment technique failure
 Jan 1, 1997 Resolved
Total Coliform
Contaminant limit exceeded
 Sep 1, 1996 Archived
Total Coliform
Contaminant limit exceeded
 Oct 1, 1995 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Sep 1, 1995 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Aug 1, 1995 Archived
Total Coliform
Contaminant limit exceeded
 Jul 1, 1995 Archived
Total Coliform
Contaminant limit exceeded
 Jun 1, 1995 Archived
Total Coliform
Contaminant limit exceeded
 May 1, 1995 Archived
Lead and Copper Rule
Treatment technique failure
 Jan 1, 1994 Resolved
Lead and Copper Rule
Treatment technique failure
 Jan 1, 1993 Resolved
Total Coliform
Contaminant limit exceeded
 May 1, 1992 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Jan 1, 1992 Archived
Lead and Copper Rule
Treatment technique failure
 Jan 1, 1992 Resolved
Total Coliform (acute)
Contaminant limit exceeded
 Aug 1, 1991 Archived
Total Coliform
Contaminant limit exceeded
 Jun 1, 1991 Archived
Total Coliform
Contaminant limit exceeded
 Feb 1, 1991 Archived

Enforcement actions

Massachusetts regulators took 7 formal enforcement actions against Malden Water Division (MWRA) between 1993 and 2023. The most recent was a compliance order (no penalty) in February 2023.

Date By Action Violations covered
Feb 9, 2023 Massachusetts Compliance order (no penalty) 1 violation: Lead and Copper Rule
Feb 24, 2020 Massachusetts Compliance order (no penalty) 1 violation: Lead and Copper Rule
Jul 28, 2016 Massachusetts Compliance order with a penalty 1 violation (1 health-based): Stage 1 Disinfection Byproducts Rule
Sep 19, 2006 Massachusetts Compliance order (no penalty) 1 violation (1 health-based): Lead and Copper Rule
Feb 10, 2000 Massachusetts Compliance order (no penalty) 1 violation (1 health-based): Lead and Copper Rule
Feb 17, 1998 Massachusetts Compliance order (no penalty) 1 violation (1 health-based): Lead and Copper Rule
Jun 29, 1993 Massachusetts Compliance order (no penalty) 1 violation (1 health-based): Surface Water Treatment Rule

What the violations mean

Stage 1 Disinfection Byproducts Rule

1 incident

The system did not meet a treatment requirement of the Stage 1 Disinfectants and Disinfection Byproducts Rule

Byproducts form when disinfectants react with natural material in water. Long-term exposure above federal limits may increase cancer risk

Where the water comes from

Malden Water Division (MWRA) buys its water from MWRA. It lists no wells or intakes of its own. 1 smaller public system such as schools, businesses or campgrounds buys water from Malden Water Division (MWRA).

Buys water from

Annual water quality report

Malden Water Division (MWRA) must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Massachusetts.

Certified drinking water labs by state EPA guidance for private wells