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Public water system record

Stonington Water Company

On record as serving Hancock County, ME · Serves 683 people

Federal records show 5 health-based violations and 6 monitoring/reporting issues for Stonington Water Company in the last ten years. The most serious issue in this window was a Total Trihalomethanes (TTHMs) violation that EPA lists as archived, not resolved.

  • ME0091510
  • WINTERPORT
  • ME
  • 683 served

System profile

Source water Groundwater
ZIP 04496
EPA system ID ME0091510

Verify this system on EPA ECHO →

Health-based violations, last 10 years
5
Resolved
4
Unresolved
0
Archived by EPA
1
Any acute record
Yes
Monitoring issues, last 10 years
6

Key facts

  • Stonington Water Company draws water from 7 wells (5 of them for emergency, seasonal or other part-time use).
  • Highest measured level in the last 10 years: Gross Alpha, Excl. Radon and U, 29 pCi/L, federal limit 15 pCi/L (1.9 times the limit), 2019.
  • Most recent enforcement action: boil water order by Maine, December 2020.
  • Record on file since 1993, with 14 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 261 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
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jul 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 27 pCi/L, federal limit 15 pCi/L (1.8 times the limit)
 340 Jul 1, 2021 Resolved No
Revised Total Coliform Rule
Contaminant limit exceeded
 110 Dec 1, 2020 Resolved Yes
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 29 pCi/L, federal limit 15 pCi/L (1.9 times the limit)
 340 Jan 1, 2019 Resolved No
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 25 pCi/L, federal limit 15 pCi/L (1.7 times the limit)
 340 Oct 1, 2018 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Apr 1, 2023 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Apr 1, 2023 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Oct 1, 2019 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Oct 1, 2019 Resolved
Combined Radium (-226 and -228)
Monitoring and reporting
 Jan 1, 2019 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2019 Resolved

Full record since 1993

EPA's records for Stonington Water Company go back to 1993. Before October 19, 2016 they list 14 health-based violations (9 resolved, 5 archived by EPA without a recorded fix) and 15 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 7 10
2000s 5 5
2010 to October 18, 2016 2 0
October 19, 2016 to 2019 2 4
2020s 3 2

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2012, Resolved.

Show all 14 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0846 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Oct 1, 2012 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0818 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Jul 1, 2012 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 0.0323 mg/L, federal limit 0.03 mg/L (1.1 times the limit)
 Oct 1, 2008 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 38 µg/L, federal limit 30 µg/L (1.3 times the limit)
 Jul 1, 2008 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 36 µg/L, federal limit 30 µg/L (1.2 times the limit)
 Apr 1, 2008 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 36 µg/L, federal limit 30 µg/L (1.2 times the limit)
 Jan 1, 2008 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 36 µg/L, federal limit 30 µg/L (1.2 times the limit)
 Oct 1, 2007 Resolved
Total Coliform
Contaminant limit exceeded
 Nov 1, 1998 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Oct 1, 1995 Resolved
Surface Water Treatment Rule
Treatment technique failure
 May 1, 1994 Archived
Surface Water Treatment Rule
Treatment technique failure
 Apr 1, 1994 Archived
Surface Water Treatment Rule
Treatment technique failure
 Dec 1, 1993 Archived
Surface Water Treatment Rule
Treatment technique failure
 Nov 1, 1993 Archived
Surface Water Treatment Rule
Treatment technique failure
 Oct 1, 1993 Archived

Enforcement actions

Maine regulators and EPA took 1 formal enforcement action against Stonington Water Company and issued 1 boil water order between 1994 and 2020. The most recent was a boil water order in December 2020.

Date By Action Violations covered
Dec 23, 2020 Maine Boil water order 1 violation (1 health-based): Revised Total Coliform Rule
May 13, 1994 EPA Compliance order (no penalty) 3 violations (3 health-based): Surface Water Treatment Rule

What the violations mean

Gross Alpha, Excl. Radon and U

3 incidents

Test results for Gross Alpha, Excl. Radon and U were above the federal limit (a maximum contaminant level violation).

The utility had to notify customers about each of these violations.

Total Trihalomethanes (TTHMs)

1 incident

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Revised Total Coliform Rule

1 incident

The system did not meet a requirement of the Revised Total Coliform Rule

Coliform and E. coli rules protect against bacteria in the distribution system

Where the water comes from

Stonington Water Company draws water from 7 wells (5 of them for emergency, seasonal or other part-time use).

Annual water quality report

Stonington Water Company 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.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

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 Maine.

Certified drinking water labs by state EPA guidance for private wells