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HIDDEN VALLEY/MASON

New Hampshire — Community Water System — PWSID: NH2372020

System Information

PWSIDNH2372020
System NameHIDDEN VALLEY/MASON
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region01
Serves SchoolNo
WholesalerNo
First ReportedMar 2, 1989
Last ReportedDec 15, 2025

Location & Contact

StateNew Hampshire
CityMOULTONBOROUGH
ZIP Code03254
AddressPO BOX 389
OrganizationLAKES REGION WATER CO.
Phone—

Population & Service

Population Served298
Service Connections119

Drinking Water Violations (97)

This water system has 97 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Oct 10, 2024 Lead and Copper Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Oct 10, 2024 Lead and Copper Rule
Dec 1, 2016 — Revised Total Coliform Rule RPT No No — — — Resolved Jan 19, 2017 Revised Total Coliform Rule
Dec 1, 2016 — Revised Total Coliform Rule RPT No No — — — Resolved Jan 19, 2017 Revised Total Coliform Rule
Dec 1, 2016 — Revised Total Coliform Rule RPT No No — — — Resolved Jan 19, 2017 Revised Total Coliform Rule
Dec 1, 2016 — Revised Total Coliform Rule TT Yes No — — — Resolved Jan 19, 2017 Revised Total Coliform Rule
Dec 1, 2016 — Revised Total Coliform Rule TT Yes No — — — Resolved Jan 19, 2017 Revised Total Coliform Rule
Dec 1, 2016 — Revised Total Coliform Rule TT Yes No — — — Resolved Jan 19, 2017 Revised Total Coliform Rule
Dec 1, 2016 — Revised Total Coliform Rule TT Yes No — — — Resolved Jan 19, 2017 Revised Total Coliform Rule
Dec 1, 2016 — Revised Total Coliform Rule RPT No No — — — Resolved Jan 19, 2017 Revised Total Coliform Rule
Sep 1, 2011 Sep 30, 2011 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2011 Total Coliform Rule
Sep 1, 2011 Sep 30, 2011 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2011 Total Coliform Rule
Dec 1, 2010 Dec 31, 2010 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Dec 31, 2010 Total Coliform Rule
Dec 1, 2010 Dec 31, 2010 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Dec 31, 2010 Total Coliform Rule
Dec 1, 2010 Dec 31, 2010 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Dec 31, 2010 Total Coliform Rule
Dec 1, 2010 Dec 31, 2010 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Dec 31, 2010 Total Coliform Rule
Jan 1, 1996 Dec 31, 1996 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 1996 Nitrate Rule
Jan 1, 1996 Dec 31, 1996 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 1996 Nitrate Rule
Jan 1, 1994 Dec 31, 1994 Chlordane MR No Yes — 0.002 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 1994 Volatile Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 1994 Volatile Organic Chemicals
Jan 1, 1994 Dec 31, 1994 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 1994 Volatile Organic Chemicals
Jan 1, 1994 Dec 31, 1994 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 1994 Volatile Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 1994 Volatile Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 1994 Volatile Organic Chemicals
Jan 1, 1994 Dec 31, 1994 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 1994 Volatile Organic Chemicals
Jan 1, 1994 Dec 31, 1994 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 1994 Volatile Organic Chemicals
Jan 1, 1994 Dec 31, 1994 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 1994 Volatile Organic Chemicals
Jan 1, 1994 Dec 31, 1994 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 1994 Volatile Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Picloram MR No Yes — 0.5 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Picloram MR No Yes — 0.5 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Dinoseb MR No Yes — 0.007 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 Dinoseb MR No Yes — 0.007 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals
Jan 1, 1994 Dec 31, 1994 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 1994 Synthetic Organic Chemicals

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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