If you rely on a private well in Northern California, you already know that unfiltered water can become smelly, cloudy, or unpleasant—and may even pose health risks. Contaminants like bacteria, sediment, heavy metals, and chemicals can compromise your water quality.
Annual testing is essential for well owners. At Ongaro & Sons, we work with certified third-party labs to test your water and recommend effective water filtration and treatment systems tailored to your needs. Our team will help you find the right solution to ensure your drinking water is safe and great-tasting, whether you are in Santa Rosa, Bodega Bay, San Rafael, Novato, Glen Ellen, or a surrounding community of Marin, Sonoma, and Napa counties.
Concerned About Your City Water?
Even if you’re connected to a municipal water supply, contamination can still be a concern. City water typically comes from lakes, rivers, or groundwater, and though treated to meet EPA standards, it may contain trace chemicals or pollutants introduced through:
Corroding infrastructure or old pipes
Stormwater runoff or flooding
Overuse of chlorine or other disinfectants
Municipalities are required to provide annual water quality reports, but if you notice odd smells, taste changes, or discoloration, it’s worth taking a closer look at your home’s water quality.
Do You Have “Forever Chemicals” in Your Drinking Water?
PFAS (Per- and polyfluoroalkyl substances), commonly known as “forever chemicals,” are an emerging threat found in both well and municipal water supplies. These chemicals don’t break down in the environment and have been linked to health issues, including:
Elevated cholesterol
Liver damage
Increased risk of kidney cancer
Hormonal changes and reproductive effects
PFAS can enter the water supply through industrial runoff, firefighting foams, and even consumer products. A high-quality drinking water system—especially one using activated carbon or reverse osmosis—can significantly reduce your exposure.
Water Treatment Solutions
There is no one-size-fits-all filter. The best solution depends on what’s in your water:
If your water appears cloudy or has visible particles, you’re likely dealing with sediment such as silt, rust, or sand—especially common in well systems. These particles can clog fixtures, wear down appliances, and make water unpalatable. A whole-house sediment filtration system traps these materials at the point of entry, protecting your plumbing system and improving water clarity throughout the home. For enhanced protection, we often pair this with a point-of-use drinking water system at the kitchen sink, ensuring the water you consume is both clean and refreshing.
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 Northern California. 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.
PHCC- and NATE-Certified Experts
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—no surprises.
Installing and Maintaining Drinking Water Systems
Whether you want a point-of-use system for drinking water or a whole-home treatment system, Ongaro & Sons will design and install the right setup for your home’s unique needs.
And just like any appliance, your water filtration system needs routine care to work its best. We offer:
Filter replacement and system tune-ups
Annual inspections
Upgrades and repairs for older systems
From initial testing to long-term maintenance, Ongaro & Sons has your water covered.
Eliminate Contaminants in Your Drinking Water
Whether you're treating well water in rural Sonoma County or purifying city water in Marin, Ongaro & Sons offers expert water filtration and treatment services tailored to your home.
With nearly a century of experience serving Northern California, including Fulton, Mill Valley, Rohnert Park, and other nearby communities, our family-owned business delivers trusted plumbing solutions and peace of mind. Call us at 415-741-2820 or request services online today to schedule a water quality consultation.
Your health starts with what you drink—let’s make it clean, clear, and worry-free.
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Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Neglecting your routine checkups can potentially put everyone at risk.
With these annual visits, our experienced technicians use the latest technology to help find unsafe problems before they can become bigger problems.
Maintenance Plan Benefits
Member benefit of 5% discount on repairs and replacements.
Proactive maintenance identifies and addresses issues before they become big problems.
Courtesy reminder calls for scheduled services and appointments.
Special Offers
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Limited-time offers—don’t miss out!
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Frequently Asked Questions
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.