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Public water system record

Sunapee Water Works

Serves an area of Sullivan County, NH · 1,680 people served

Federal records show 8 health-based violations and no monitoring/reporting issues for Sunapee Water Works in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • NH2271010
  • SUNAPEE
  • NH
  • 1,680 served

System profile

Source water Surface water
ZIP 03782
EPA system ID NH2271010

Verify this system on EPA ECHO →

Health-based violations, last 10 years
8
Resolved
8
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • Sunapee Water Works draws water from 1 surface water intake.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit), 2019.
  • Most recent formal enforcement: compliance order (no penalty) by New Hampshire, November 2019.
  • Record on file since 1992, with 7 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 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jan 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Oct 1, 2019 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2019 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Apr 1, 2019 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2019 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Oct 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2018 Resolved No

Full record since 1992

EPA's records for Sunapee Water Works go back to 1992. Before October 19, 2016 they list 7 health-based violations (6 resolved, 1 archived by EPA without a recorded fix) and 15 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 4 13
2000s 3 2
October 19, 2016 to 2019 7 0
2020s 1 0

Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began January 2008, Resolved.

Show all 7 health-based violations before October 19, 2016
Contaminant Start date Status
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 Jan 1, 2008 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 Oct 1, 2007 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.071 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 Jul 1, 2007 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Sep 1, 1998 Resolved
Total Coliform (acute)
Contaminant limit exceeded
 Nov 1, 1996 Resolved
Total Coliform
Contaminant limit exceeded
 Aug 1, 1992 Archived
Surface Water Treatment Rule
Treatment technique failure
 Jan 1, 1992 Resolved

Enforcement actions

New Hampshire regulators took 2 formal enforcement actions against Sunapee Water Works between 2008 and 2019, filed as 9 records in EPA's data. The most recent was a compliance order (no penalty) in November 2019.

Date By Action Violations covered
Nov 1, 2019 New Hampshire Compliance order (no penalty) 8 violations (8 health-based): Total Trihalomethanes (TTHMs)
Jun 2, 2008 New Hampshire Signed compliance agreement 3 violations (3 health-based): Haloacetic Acids (HAA5)

What the violations mean

Total Trihalomethanes (TTHMs)

8 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Sunapee Water Works draws water from 1 surface water intake.

Annual water quality report

Sunapee Water Works 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 New Hampshire.

Certified drinking water labs by state EPA guidance for private wells