PlainWater
States → New Hampshire

HIDDEN VALLEY/MASON

PWS ID: NH2372020 · MOULTONBOROUGH, New Hampshire 03254

Population Served
298
Total Violations
121
Health-Based Violations
15
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
119
County
Carroll
School/Daycare
No
MCL Violations
11
Monitoring Violations
101
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 11 2011
Nitrite MR 5 1996
Revised Total Coliform Rule RPT 4 2016
Revised Total Coliform Rule TT 4 2016
Lead and Copper Rule MR 2 2024
Nitrate MR 2 1994
1,2,4-Trichlorobenzene MR 2 1994
Endrin MR 2 1994
cis-1,2-Dichloroethylene MR 2 1994
BHC-GAMMA MR 2 1994
Xylenes, Total MR 2 1994
Methoxychlor MR 2 1994
DICHLOROMETHANE MR 2 1994
Toxaphene MR 2 1994
Glyphosate MR 2 1994
Vinyl chloride MR 2 1994
1,1-Dichloroethylene MR 2 1994
Simazine MR 2 1994
trans-1,2-Dichloroethylene MR 2 1994
Di(2-ethylhexyl) phthalate MR 2 1994
1,2-Dichloroethane MR 2 1994
Carbon tetrachloride MR 2 1994
Hexachlorocyclopentadiene MR 2 1994
1,2-Dichloropropane MR 2 1994
Carbofuran MR 2 1994
Trichloroethylene MR 2 1994
1,1,2-Trichloroethane MR 2 1994
LASSO MR 2 1994
Benzene MR 2 1994
2,4-D MR 2 1994
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.