Filters, Water & Instrumentation, Inc. - NH & MA
Verified Pro
28+ years online5.0
Water Treatment & Softeners in Nashua, NH
Compare 20 water treatment & softeners contractors near you in Nashua and surrounding area with an average rating of 4.7/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated March 22, 2026
Most pros respond within 2–24 hours
Verified Pro Installers
Other Businesses in This Area
PureSpring Water Softeners & Filters
~3 years onlineWellness Water Filtration Systems
5½+ years onlineCharger Water Treatment Products
5.028½+ years onlineNew England Water Systems
5.0Ferris Plumbing, Heating & Air
4.95½+ years onlineNH Tap
4.9~10 years onlineNH WaterCare Corp.
4.919½+ years onlineSecondwind Water Systems, Inc.
4.919½+ years onlineAqualite US
4.813 years onlineDiBacco Plumbing, Heating & Cooling
4.812½+ years onlineNortheast Water Wells, Inc.
4.722½+ years onlineCritical Process Filtration, Inc.
4.426½+ years onlineMASI Plumbing, Heating & AC
4.410 years onlineWater Treatment & Softeners in Nearby NH Cities
Other Services in Nashua
Access Control & Intercom(39)Alarm System Installation(20)Appliance Installation(19)Artificial Turf Installation(29)Automotive Installs(2)Concrete & Paving(36)Deck & Patio Building(35)Electrical Services(24)EV Charger Installation(12)Fencing & Gate Installation(30)Fire Protection & Sprinklers(30)Garage Door Installation(21)
About Water Treatment & Softeners in Nashua
Water treatment covers filtration, softening, and purification systems for homes and businesses. Common solutions include whole-home water softeners, reverse osmosis drinking water systems, and iron/sulfur filters. The right system depends on your water source and specific contaminants.
Typical costs: Under-sink reverse osmosis systems run $300–$800 installed. Whole-home water softeners are $1,500–$4,000. Iron filters and multi-stage whole-home systems are $2,000–$6,000+.
Common projects include:
- Whole-home water softener installation
- Reverse osmosis drinking water system
- Iron and sulfur filtration
- UV water purification
- Well water treatment systems
Water treatment installations that modify plumbing may require plumbing permits. Well water systems may need additional environmental or health department approval.
Frequently Asked Questions
- How much does water treatment & softeners cost in Nashua?
- An under-sink reverse osmosis system runs $300–$800 installed. A standard water softener is $1,500–$4,000 including installation and plumbing connections. Well water treatment systems with multiple stages (sediment, iron, softener, UV) can run $3,000–$8,000. Annual maintenance (filters, salt) is $100–$300.
- How do I find a reliable water treatment & softeners contractor in Nashua?
- Start with a water test — a good installer will test your water before recommending a system. Ask about ongoing maintenance costs (filter replacements, salt, UV bulb changes). The cheapest system isn't the best deal if filters cost $200 every 6 months.
- Do I need a permit for water treatment & softeners in Nashua?
- Simple point-of-use filters don't need permits. Whole-home systems that tie into the main water line may require a plumbing permit. Well water treatment systems may need health department review in some areas.
About NeedInstall
NeedInstall helps connect customers with local installation professionals across Nashua and surrounding communities. Featured contractors have claimed their profile and verified their business information. Listings marked as "Verified Pro" have been confirmed by the business owner.