Water Treatment Systems
Water Treatment Systems in Marin, Sonoma & Napa County
Reliability and efficiency are essential when it comes to your home’s water system. From improving your home’s water quality with advanced filtration systems to replacing outdated fixtures, repairing leaks, or installing water treatment systems, Ongaro & Sons brings the experience and care your home deserves.
Our licensed plumbers are trained to handle everything from routine maintenance to complex water system installations and repairs.
We understand that no two homes are the same, which is why we tailor our plumbing solutions to your specific needs. With a focus on energy efficiency, safety, and long-lasting results, we’re here to help you make the most of your home’s water systems in the North Bay.
Trusted Plumbing Expertise From Ongaro & Sons Since 1932
At Ongaro & Sons, we proudly offer comprehensive water system services throughout Marin, Sonoma, and Napa counties, including cities like Bodega Bay, San Rafael, Novato, Corte Madera, and Kenwood.
Our licensed plumbing experts are committed to delivering clean, efficient, and reliable water solutions for your home, backed by trusted service since 1932.
Water Filtration and Treatment Services
Safe, clean water is essential for your family’s health. We offer several water treatment solutions tailored to address local water quality concerns:
Reverse Osmosis Systems
Reverse osmosis systems use a multi-stage filtration process to remove up to 99% of harmful contaminants like lead, chlorine, arsenic, and bacteria. This system delivers clean, fresh-tasting water straight from your tap, making it ideal for drinking, cooking, and protecting your family’s health with every glass.
Sediment Filtration
Sediment filters trap and remove larger particles like sand, rust, and dirt from your water supply. This not only improves water clarity but also protects your pipes, faucets, and water-using appliances from premature wear and damage caused by abrasive debris circulating through your plumbing system.
Whole-Home Water Filtration Systems
A whole-home filtration system ensures every drop of water entering your home is cleaner and healthier. It improves the quality of water for bathing, laundry, and cooking by removing chlorine, contaminants, and odors, offering a consistent supply of filtered water from every faucet in your house.
Water Softeners
Water softeners treat hard water by removing minerals like calcium and magnesium that cause scale buildup. This helps extend the lifespan of your water heater, dishwasher, and other appliances, while also preventing dry skin, dull hair, and spotted dishes caused by mineral deposits in your water supply.
Our team will assess your water supply and recommend the best solution based on your home’s needs. Plus, we offer water treatment maintenance to ensure your system continues operating at peak performance.
Water Heater Services
From hot showers to clean dishes, your water heater is one of the hardest-working appliances in your home. Ongaro & Sons offers expert water heater installation, repair, and maintenance services for both traditional tank and tankless units.
We service and install energy-efficient models from top brands and help you choose the right size and fuel type (gas, electric, or hybrid) for your household. Our plumbers also provide regular tune-ups to reduce energy costs, prevent breakdowns, and extend your water heater’s life.
Signs you may need water heater service:
- Lukewarm or inconsistent hot water
- Unusual noises like popping or rumbling
- Rust-colored water or leaks near the tank
Don’t wait for a cold shower, contact our licensed pros today for dependable service.
Radiant Heating, Irrigation & Water Line Services
Radiant Floor Heating
Enjoy even, efficient warmth under your feet with radiant floor heating. Ideal for bathrooms, kitchens, and entire homes, radiant systems use warm water running through pipes beneath your flooring to heat the space from the ground up. Compared to forced-air heating, radiant systems are:
- Quieter
- More energy-efficient
- Better for indoor air quality (no blown dust or allergens)
Our technicians handle everything from new installations to maintenance and repairs, ensuring comfort you can feel from the floor up.
Lawn Irrigation Systems
Keep your yard lush and green with a professionally installed lawn irrigation system. Ongaro & Sons designs water-efficient systems that deliver just the right amount of water where and when your landscape needs it. We specialize in the following lawn irrigation systems:
- Sprinkler installation and repairs
- Drip irrigation for gardens and planters
- Smart controllers for automated watering
- Leak detection and seasonal maintenance
Whether you’re upgrading an outdated system or installing irrigation for a new home, we’ll help you save water, time, and money.
Water Line Replacement
If you’re experiencing low water pressure, discolored water, or unexplained wet spots in your yard, your main water line may need repair or replacement. Over time, aging pipes can corrode, crack, or become blocked by tree roots.
Our experienced plumbers use modern techniques, including trenchless methods where possible, to minimize disruption to your property while restoring your water supply quickly and safely. We’ll inspect the line, explain your options, and perform a durable, code-compliant installation with upfront pricing.
Schedule Your Water System Service
Whether you need water filtration, a new water heater, radiant floor heating, or a full water line replacement, our licensed plumbers are ready to help. We proudly serve Sonoma, Marin, and Napa counties, including Santa Rosa, San Rafael, Novato, Bodega Bay, and surrounding communities. Call us now at 415-741-2820 or book your appointment online for dependable water system service you can trust.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert, specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Marin, Sonoma and Napa County. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
Licensed, Insured, Background-Checked
Our technicians are licensed, experienced, and trained to service all makes and models.
Locally Owned and Operated
Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
Reliable Repairs
We respond quickly and get the job done right the first time, with no surprises.
Since 1932
Why Ongaro & Sons for Whole-House Water Systems
Water treatment only pays off when it is specified against a test rather than a sales script.
Schedule Service →A water test before a recommendation
Hardness, sediment and taste are different problems with different equipment. Specifying without testing is how houses end up with a softener that fixed nothing.
Local supply differences accounted for
Hardness across North Bay districts varies enough to change the answer. Your district, not a regional average, is what matters.
Sizing matched to actual flow
Undersized treatment equipment throttles the whole house. Oversized equipment wastes water and salt regenerating.
Maintenance requirements stated up front
Every treatment system needs servicing. Knowing the ongoing cost before you buy is part of the decision.
The test result stays with you
You keep the water analysis, so any future decision about treatment starts from evidence rather than from another sales visit.
Discount
Membership
Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Members get priority scheduling, discounts, and proactive checkups that catch problems early.
Member Discounts
5% off every repair and replacement, all year long.
Peace of Mind
Proactive checkups catch issues before they become big problems.
Courtesy Reminders
We call you to schedule: never miss a seasonal service.
Value That Lasts
With Ongaro & Sons, you’re investing in quality, integrity, and service that stands the test of time. Explore our current promotions and see the difference real value makes for your HVAC, plumbing, and electrical needs.
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Read MoreFrequently Asked Questions
Can an RO system remove hard water minerals like calcium and magnesium?
Yes, RO systems reduce hardness-causing minerals, but they’re not a substitute for a whole-home water softener. For households with very hard water, it’s best to combine a water softener with a reverse osmosis system.
Can I install a water filtration system myself?
Basic under-sink units can be DIY, but whole-house systems should be installed by a licensed plumber to ensure proper connections and code compliance.
Can sediment filtration improve water taste and odor?
Sediment filters are primarily for removing visible particles. To improve taste and odor, they’re often paired with activated carbon filters or reverse osmosis systems, which target chlorine and other chemical contaminants.
Do I need a reverse osmosis system if I already have a water softener?
Yes, softeners remove minerals, while RO systems target smaller impurities and improve taste and purity.
How do I know if I need a water softener?
Signs include soap scum, stiff laundry, cloudy dishes, and frequent scale buildup on faucets and appliances.
Is sediment filtration necessary if I already have a water softener or RO system?
Yes. Sediment filters are essential even with a softener or reverse osmosis system. They act as a pre-filter, protecting more sensitive systems from clogging or premature wear caused by particulate matter.
What can a water filtration system remove?
It removes contaminants like chlorine, lead, sediment, and other impurities for better taste, odor, and safety.