The Most Certified Water Treatment Professionals in the Country — Right Here in New Hampshire
From homes and businesses to public water supplies, Secondwind Water Systems delivers unmatched expertise and custom solutions for every water challenge.
Secondwind Water Systems is your leading water treatment experts, we don’t just treat water — we solve complex water challenges with the most certified water specialists in a single location anywhere in the country.
Based in Manchester, New Hampshire, we serve thousands of homeowners, businesses, and public water system customers across the region with personalized solutions backed by unmatched technical knowledge, thoughtful service, and true local care.

Why Certification Matters
Water quality issues are complex. Having the right solution starts with having the right people. That’s why we invest heavily in training and certification through the Water Quality Association (WQA) and other industry-recognized programs.
Certified professionals know how to:
- Accurately diagnose and interpret water test results
- Design systems that meet regulatory standards and customer needs
- Install and service equipment to the highest standards of performance and safety
When you work with certified experts, you’re not just buying a product — you’re gaining a partner who understands the science behind the solution and will do the job right, the first time.
A Team You Can Trust in Your Home or Business
At Secondwind, we hold our team to a high standard — not just for their technical skills, but for their integrity. When you choose us, you’ll work with honest, respectful professionals who take pride in their work and genuinely care about doing right by you.
We only hire people that we’d feel comfortable inviting into our own homes and businesses. That trust is the foundation of our service and one of the reasons so many of our customers stay with us for life.
Contact a Water Specialist
Residential Water Treatment You Can Trust
Whether you’re dealing with hard water, unwanted odors, staining, or contaminants like Arsenic, Radon, or PFAS, our team customizes solutions to meet the specific needs of your home and family.
We offer:
- Free water testing and consultations
- High-efficiency water softeners
- Advanced drinking water systems
- Whole-house filtration
- Specialty treatment for health-related contaminants
We also specialize in helping new homeowners with wells start strong with safe, reliable water treatment.
Commercial Water Solutions: Reliable, Compliant, Efficient
From car washes and manufacturing plants to hospitals and food service operations, our commercial division tailors water systems to support productivity, protect equipment, and meet regulatory standards.
We work with:
- Manufacturers & food processors
- Healthcare facilities
- Hospitality & office buildings
- Breweries, bakeries, and other specialty businesses
We offer full-service support including system design, installation, preventative maintenance, and remote monitoring.

Public Water Systems: Safe Water for Communities
Municipalities and private community water systems rely on Secondwind to stay in compliance with state and federal regulations. We provide turnkey services for community well systems, mobile home parks, schools, gas stations, and more.
Our public water services include:
- System design & engineering support
- Licensed operator services
- Monitoring, maintenance, and emergency response
- Sampling and compliance reporting
We work closely with NHDES and other regulatory agencies to ensure systems are running safely and smoothly.
What Sets Secondwind Apart?
- 35+ years of local expertise
- Lifetime relationship promise
- Industry-leading warranties
- Locally owned & operated
- Most certified water treatment professionals in the U.S. in one location
- Over 10,000 residential, commercial, and public water customers
- Full-service support, from design to installation and ongoing care
Let’s Solve Your Water Problem — Together
Every water source is different. That’s why we never take a one-size-fits-all approach.
Reach out to us for a free consultation, and discover the Secondwind difference — where certified expertise meets local care, and where integrity and service go hand in hand.


