Local Water Quality Experts Testing, Softeners & Filtration for Southern NH Homes
Safe, clean, and great-tasting water — because your family deserves the best.
At GSMS, we understand how important water quality is to your family’s health, your plumbing system, and even your appliances. Whether you’re noticing stains, odors, hard water spots, or you just want peace of mind that your water is safe to drink, we’re here to help.
With decades of experience and a reputation for doing the right thing for our customers, GSMS provides trusted water quality solutions tailored to your home’s unique needs.

Why Water Quality Matters
The water in your home might look clear, but it can still contain dissolved minerals, sediments, bacteria, or chemicals that cause problems.
Poor water quality can lead to:
- Dry, itchy skin and dull hair
- White, crusty scale buildup on faucets, showerheads, and inside pipes
- Stains on sinks, tubs, and laundry
- Foul tastes and odors
- Clogged plumbing and reduced appliance lifespan
- Potential health concerns from bacteria or contaminants
At GSMS, we provide thorough water testing and customized treatment plans to resolve these issues. Our services align with EPA-recognized water quality standards for New Hampshire, giving you confidence that your water is as safe and clean as it should be.
Frequently Asked Questions
Common signs include stains on sinks or laundry, dry skin, soap not lathering well, foul odors, or a bad taste. We recommend a water test to be sure.
Most tests take less than an hour, and we’ll explain the results on the spot so you understand what’s in your water.
It depends on your water. Some homes need both — a softener for hard minerals and a filter for sediment, chlorine, or odors. We’ll help you determine what’s best.
Municipal water meets minimum safety standards, but it can still be hard, chlorinated, or carry sediments and metals that affect taste, smell, and performance.
We recommend testing once a year or any time you notice changes in taste, odor, pressure, or staining. Well water users especially, should test regularly for safety and quality.
Our Water Quality Services For New Hampshire Homes
We don’t believe in one-size-fits-all solutions; we customize our recommendations based on the results of your water test and your concerns.
Water Testing & Analysis
A comprehensive water test is the foundation of any effective treatment plan. We collect and analyze samples for:
- Hardness levels
- Iron and manganese content
- Sediment or turbidity
- Chlorine and other chemical residuals
- pH and acidity
- Odors or off-tastes
We explain your results clearly, answer your questions, and recommend the best solutions based on real data, not guesswork.
Water Softeners
Hard water is one of the most common problems in New Hampshire homes. Our high-efficiency water softeners remove excess calcium and magnesium, which:
- Prevents scale buildup in pipes and appliances
- Makes soaps and shampoos lather better
- Leaves your skin and hair feeling softer
- Reduces spots and streaks on dishes and fixtures
We’ll size and install a system that fits your water usage and home size perfectly.
Whole-Home Water Filtration
Not all problems are caused by hardness; sometimes your water just doesn’t taste, smell, or look right. Our filtration systems tackle issues like:
- Rust stains from iron and manganese.
- Chlorine taste or odor from municipal supplies.
- Cloudy water is caused by fine particles.
- Unpleasant or metallic aftertastes.
Reverse Osmosis Drinking Water Systems
For homeowners who want the purest water possible, reverse osmosis is the gold standard. RO systems filter out tiny contaminants that other filters miss, giving you bottled-water quality at home. Benefits include:
- Fresh, clean drinking water at your kitchen sink.
- Removes dissolved solids, lead, and other contaminants.
- Great for cooking, coffee, and baby formula.
We install and maintain these under-sink systems so you always have a reliable supply of safe water.
Sediment Filters
Many homes with wells or even city water in New Hampshire deal with sand, grit, and other particles that can clog faucets and damage appliances. Our sediment filters:
- Trap large particles before they reach your plumbing.
- Prevent wear on valves, seals, and fixtures.
- Extend the life of your softeners and RO systems by protecting them from debris.
The GSMS Difference
When you choose GSMS, you’re not just getting clean water; you’re getting the peace of mind that comes with working with a company that truly cares. Here’s what sets us apart:
- Locally Owned & Operated Since 1987: We’re a family business dedicated to serving our neighbors in southern New Hampshire.
- We Make it Right: If something isn’t perfect, we’ll fix it — no excuses.
- Top-Quality Products & Installation: We partner with trusted manufacturers and install systems that last.
- Licensed, Skilled Specialists: Our team is trained, licensed, and experienced to deliver excellent results.
- Personalized Water Solutions: We start with a detailed water test and tailor our recommendations to your specific water challenges — no guessing, no “one-size-fits-all.”
- Local Water Expertise: We know the unique water issues in New Hampshire, from iron stains to hard water, and how to fix them effectively.
- One Call Does it All: From plumbing and heating to water quality, we’re your trusted, single-source contractor.
- Long-Term Support: We stand by our work and are always here when you need us.
Take the First Step Toward Better Water
Your family deserves clean, healthy, great-tasting water, and GSMS is here to make it happen. Whether you’re tired of hard water stains, strange tastes and odors, or just want peace of mind about what’s coming out of your taps, we can help.
We’ll start with a thorough water test to uncover exactly what’s in your water, explain your options clearly, and recommend the right solution for your home and budget. From testing to installation and ongoing support, we’re with you every step of the way.
Don’t wait to enjoy the comfort and confidence of knowing your water is clean and safe. Call us today at 603-424-8258 or schedule your water test online, and let GSMS help you take control of your water quality once and for all.