Public Water Partners

NASHUA, NH · Rockingham County

GREAT BAY WATER SYSTEM Water System

Consumer Confidence Report status

GREAT BAY WATER SYSTEM must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for GREAT BAY WATER SYSTEM.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace New Hampshire’s official records. Always confirm current status with New Hampshire before making decisions based on this information.

System facts

System ID (PWSID)
NH1732030
System type
Community Water System
Population served
228
Service connections
91
Ownership
privately owned
Water source
groundwater (wells)

GREAT BAY WATER SYSTEM is one of 877 community water systems in New Hampshire in the 500 or fewer people size category, serving 228 people from groundwater.

As of August 1, 2026, its federal record holds 73 entries between 1991 and 2009, all of which EPA lists as closed. Nothing has been added since 2009.

Of the 73, 71 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, synthetic organic chemicals, and the Total Coliform Rules.

Violation history

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    December 1, 2009 – December 31, 2009

    Resolved

  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    January 1, 2004 – March 31, 2004

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) phthalate

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Simazine

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Glyphosate

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Chlordane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 1995 – December 31, 1995

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    June 1, 1994 – June 30, 1994

    Archived

  • Monitoring, Regular

    —

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    HEXACHLOROBENZENE

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    2,4-D

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    LASSO

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Toxaphene

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 1994 – December 31, 1994

    Resolved

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    November 1, 1991 – November 30, 1991

    Archived

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    September 1, 1991 – September 30, 1991

    Archived

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    August 1, 1991 – August 31, 1991

    Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Common questions

Is GREAT BAY WATER SYSTEM required to publish a Consumer Confidence Report?

Yes. GREAT BAY WATER SYSTEM is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is GREAT BAY WATER SYSTEM’s next Consumer Confidence Report due?

GREAT BAY WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does GREAT BAY WATER SYSTEM have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for GREAT BAY WATER SYSTEM.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

PENNICHUCK WATER WORKS INC

Phone not on record

NASHUA, NH 03064