To ensure that new and existing public water systems maintain minimum construction standards to provide safe and reliable drinking water to all of their customers.
These standards apply to all public water systems as defined by RSA 485:1-a, XV, namely, any water system that provides piped water for human consumption to 15 or more service connections, or 25 or more individuals per day for 60 or more days per year.
Statute and Administrative Rules
RSA 485:8 New Hampshire Safe Drinking Water Act/Public Water Supply Protection Program/Approval of Construction Plans
Env-Dw 404 - Design Standards for Large Public Water Systems
Env-Dw 405 - Design Standards for Small Community Public Water Systems
Env-Dw 406 - Design Standards for Non-Community Public Water Systems
Public water systems serving LESS than 1,000 people, submit the corresponding application form below to Thomas Willis at Thomas.Willis@des.nh.gov, (603) 271-2953.
Lead and Copper program approvals, submit proposed plans to Cynthia Klevens at email@example.com, (603) 271-3108. Requirements are provided under Env-Dw 714 Control of Lead and Copper.
Water treatment approvals (new or modifications to existing treatment), submit proposed plans to Cynthia Klevens at firstname.lastname@example.org or (603) 271-3108. Water treatment requirements for Small Community Systems are provided under Env-Dw 405.26 and Env-Dw 405.27. Requirements for Non-Community Systems are provided under Env-Dw 406.20 and Env-Dw 406.21.
Public water system serving MORE than 1,000 people, see application requirements under Env-Dw 404, and submit proposed upgrades to:
large systems EAST of Merrimack River
large systems WEST of Merrimack River
New Community Public Water Systems is $45 per residential unit.
New Non-community Public Water Systems is $45 per "residential-equivalent" unit, where one "residential-equivalent" unit will have an average daily demand of 300 gallons per day.
30 days from receipt of complete design submittal.
Design approvals will lapse four years from the date of approval if the approved modifications or new system construction has not begun by that time.
Additional information may be submitted at any time during the design review. The 30-day review time will be counted from the date of the last modification submitted.
Status of Current Applications
Contact staff identified under Application above.
Drinking Water and Groundwater Bureau or (603) 271-2513.
Mailing address for submittals:
NHDES Drinking Water and Groundwater Bureau
PO Box 95, 29 Hazen Drive
Concord NH 03302-0095
Microsoft Word format. Download a free viewer from Microsoft.