Backflow Base / Every state / New Hampshire
Backflow testing software for New Hampshire.
Booking, scheduling, the field test, and the report to the water system, for testing companies in New Hampshire.
New Hampshire water systems
New Hampshire has 663 active community water systems. Each test report goes to the one that serves the address. The largest:
- Manchester Water Works123,500 people served
- Pennichuck Water Works88,853 people served
- Concord Water Dept44,215 people served
- Portsmouth Water Works33,000 people served
- Keene Water Dept30,000 people served
- Dover Water Dept29,000 people served
- Merrimack Village District25,500 people served
- Rochester Water Dept25,000 people served
- Salem Water Dept21,080 people served
- Derry Water Dept17,528 people served
Water systems: EPA SDWIS, active community systems, 2026-10-19. Population: Census Bureau 2024 estimates.
Testing companies in New Hampshire
16 companies on the tester lists of 1 water system:
- A1 Water Services of New Hampshire
- Backflow Preventers LLC
- Boutin Plumbing & Heating LLC
- Capital Fire Protection Co., Inc
- DSG Plumbing Services
- Granite State Plumbing & Heating, LLC
- New England Backflow, Inc
- New England Testing
- The Backflow Pro LLC
- Thompson's Backflow
- Thorpe's Backflow Testing
- Thursty Water Systems
- Tri-State Backflow
- Viel Plumbing, LLC
- Viscariello Backflows
- White Mountain Backflow Testing
From New Hampshire Backflow Prevention Device Testing Companies (DWGB-11-3). Checked October 19, 2026. A list shows who may test, not who is good; ask the water system for its current list.
Cities
- Manchester →116,386 people
- Nashua →91,851 people
- Concord →44,674 people
Testing in New Hampshire
Who may test is set by the state, the water system, or both. Ask the water system you will test for which certifications it accepts before your first test.
The software
- Bookings from a booking page, your own website, and an AI receptionist on your phone.
- Schedule board and route for each tester.
- Field app that scores every test, even with no signal.
- Test reports sent to the water system that serves each address.
- Card payments to your own Stripe account, and yearly renewals that charge after the test.
- Client portal for HOAs, property managers and contractors.
- $50/month flat: no per-test fee, no cut of payments.
- Every feature →What the app does, part by part.
- Compare →Next to other backflow and field-service software.
- Start free →No card. $50/month or $500/year once you go live, 45 days free.
- Free exam prep →Study questions, practice exams, device tests, a VR wet lab.