MOULTONBOROUGH, NH · Carroll County
HIDDEN VALLEY/MASON Water System
Consumer Confidence Report status
HIDDEN VALLEY/MASON 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 HIDDEN VALLEY/MASON.
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)
- NH2372020
- System type
- Community Water System
- Population served
- 298
- Service connections
- 127
- Ownership
- privately owned
- Water source
- groundwater (wells)
HIDDEN VALLEY/MASON is one of 877 community water systems in New Hampshire in the 500 or fewer people size category, serving 298 people from groundwater.
As of August 1, 2026, its federal record holds 7 entries in 1994, all of which EPA lists as closed. Nothing has been added since 1994.
All 7 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 synthetic organic chemicals and volatile organic chemicals.
Violation history
Monitoring, Regular
—Vinyl chloride
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—OXAMYL
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Hexachlorocyclopentadiene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—2,4-D
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Pentachlorophenol
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,2-DIBROMO-3-CHLOROPROPANE
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—ETHYLENE DIBROMIDE
January 1, 1994 – December 31, 1994
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | OXAMYL | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 2,4-D | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Pentachlorophenol | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2-DIBROMO-3-CHLOROPROPANE | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | ETHYLENE DIBROMIDE | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
No enforcement actions on record for this system.
Common questions
Is HIDDEN VALLEY/MASON required to publish a Consumer Confidence Report?
- Yes. HIDDEN VALLEY/MASON 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 HIDDEN VALLEY/MASON’s next Consumer Confidence Report due?
- HIDDEN VALLEY/MASON’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does HIDDEN VALLEY/MASON have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for HIDDEN VALLEY/MASON.
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
LAKES REGION WATER CO.
Phone not on record
MOULTONBOROUGH, NH 03254