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Public water system record

City of Westminster

Serves an area of Carroll County, MD that includes Westminster · 35,256 people served

Federal records show 4 health-based violations and 3 monitoring/reporting issues for City of Westminster in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • MD0060015
  • WESTMINSTER
  • MD
  • 35,256 served

System profile

Source water Surface water
ZIP 21157
EPA system ID MD0060015

Verify this system on EPA ECHO →

Health-based violations, last 10 years
4
Resolved
4
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
3

Key facts

  • City of Westminster draws water from 10 wells, 3 surface water intakes and 2 reservoirs.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 87 µg/L, federal limit 80 µg/L (1.1 times the limit), 2017.
  • Most recent enforcement action: boil water order by Maryland, October 2005.
  • Record on file since 1993, with 6 health-based violations before October 19, 2016.

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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
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 83 µg/L, federal limit 80 µg/L (at or just above the limit)
 220 Apr 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 86 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Jan 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 86 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Oct 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 87 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Jul 1, 2017 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Cryptosporidium
Monitoring and reporting
 Jan 1, 2020 Resolved
Cryptosporidium
Monitoring and reporting
 Dec 1, 2019 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2013 Resolved

Full record since 1993

EPA's records for City of Westminster go back to 1993. Before October 19, 2016 they list 6 health-based violations (5 resolved, 1 archived by EPA without a recorded fix) and 13 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 2 2
2000s 4 10
2010 to October 18, 2016 0 1
October 19, 2016 to 2019 4 1
2020s 0 1

Most recent health-based violation before October 19, 2016: Nitrate (acute), began July 2006, Resolved.

Show all 6 health-based violations before October 19, 2016
Contaminant Start date Status
Nitrate (acute)
Contaminant limit exceeded
Measured 10.9 mg/L, federal limit 10 mg/L (1.1 times the limit)
 Jul 1, 2006 Resolved
Nitrate (acute)
Contaminant limit exceeded
Measured 10.6 mg/L, federal limit 10 mg/L (1.1 times the limit)
 Nov 1, 2005 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Oct 1, 2005 Resolved
Nitrate (acute)
Contaminant limit exceeded
Measured 10.69 mg/L, federal limit 10 mg/L (1.1 times the limit)
 Apr 1, 2003 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Oct 1, 1996 Archived
ETHYLENE DIBROMIDE
Contaminant limit exceeded
 Oct 25, 1995 Resolved

Enforcement actions

Maryland regulators issued 1 boil water order to City of Westminster in 2005. The most recent was a boil water order in October 2005.

Date By Action Violations covered
Oct 10, 2005 Maryland Boil water order 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule

What the violations mean

Total Trihalomethanes (TTHMs)

4 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

City of Westminster draws water from 10 wells, 3 surface water intakes and 2 reservoirs.

Annual water quality report

City of Westminster 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 Maryland.

Certified drinking water labs by state EPA guidance for private wells