Alternative channels
Mail, text, and in-person payment instructions
Pay by text
A dedicated this detail was not publicly posted. The official Aquarion payment page lists portal, app, phone, mail, and agent payments but no text-to-pay keyword or opt-in process.
Mail-in address
Aquarion Water Company of NH, P.O. Box 9267, Chelsea, MA 02150-9267 for standard remittance; the winter 2025/2026 bill insert also displays a processing lockbox of P.O. Box 3664, Portland, ME 04104-3664, so customers should follow the address on their current bill.
Counters, drop boxes, and office hours
Aquarion Water Company of New Hampshire, 7 Scott Road, Hampton, NH 03842, Monday-Friday 8:30 a.m.-4:30 p.m., with a drop box to the right of the door. Walmart locations accept cash or debit card with PIN; hours vary and Walmart may charge an $0.88 processing fee.