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Sonoma · Sonoma County · Licensed C-36
Plumber in Sonoma — fast, honest, and local since 2007.
Simeone Plumbing is your licensed local team for fast, honest plumbing across Sonoma — from the historic adobe-era homes around the Plaza to the older bungalows up in the Springs and the vineyard estates beyond. Hard water, dated galvanized lines, water heaters, drains, leaks, we handle it all at a price agreed before we start.
often available
Plumbing services we offer in Sonoma
Why Sonoma homeowners call Simeone
From a dripping faucet to a whole-home repipe, one trusted local team handles it all — at a price you approve first.
Local & responsive
- Same-day appointments often available
- Crews based in Sonoma County
- We know local homes & water
Upfront, honest pricing
- A fixed price before we start
- No hourly clock
- No pressure, no upsells
Licensed & guaranteed
- CA C-36 #890196
- Family-owned since 2007
- Make-It-Right Guarantee
Full-service plumbing in Sonoma
Residential plumbing
Repairs, installs, water heaters, drains, leaks, fixtures, repipes, and remodels for Sonoma homes — done cleanly and backed by our guarantee.
Commercial plumbing
Dependable plumbing for Sonoma businesses, property managers, and light commercial — from service calls to tenant improvements.
How it works
Book in minutes
Call or book online and tell us what’s going on at your Sonoma property.
Fixed price first
We diagnose and give you one upfront price — no hourly clock.
Done right
We do the work cleanly, test it, and back it with our Make-It-Right Guarantee.
Backed in writing
Every job is backed by full warranties — plus our Make-It-Right Guarantee on workmanship.
Your Sonoma neighbors count on us.
Simeone Plumbing has served Sonoma homes and businesses since 2007 — from the downtown Plaza and the Springs to Boyes Hot Springs, Fetters Hot Springs, and El Verano. Licensed, family-owned, and backed by our written Make-It-Right Guarantee.
- Serving every Sonoma neighborhood
- Licensed CA C-36 #890196
- Upfront pricing — no surprises
- Family-owned since 2007
What plumbing in Sonoma actually looks like
Sonoma is old in a way almost nowhere else in California is — the Plaza was laid out in 1835 and the Mission dates to 1823. About half the city’s housing was built before 1981 and a fifth before 1961. And unlike most of the county, Sonoma’s water is soft.
Genuinely soft water — and that is unusual here
Most of Sonoma County has hard water. Sonoma does not. The city’s own wells test at about 56 ppm hardness, which is soft, and the imported Sonoma Water supply runs about 92 ppm, moderately hard. If someone has tried to sell you a water softener in Sonoma, ask them what hardness number they measured first. In most of this city, softening is not the problem worth solving.
Manganese and iron are the real water story here
What Sonoma does have is minerals that stain. The Sonoma Water aqueduct supply averages 58 ppb manganese against a 50 ppb aesthetic standard — above the guideline — with iron averaging 157 ppb and readings recorded as high as 800. That is what causes dark specks from the tap, grey or brown staining in toilet tanks and tubs, and sediment in the bottom of a water heater. Filtration here targets manganese and iron, not hardness.
Arsenic in the city wells sits close to the limit
Sonoma’s six city wells supplement the roughly 90 percent of supply that comes from the Russian River aqueduct. Arsenic in those wells averages 8.1 ppb and has tested up to 10.0 against a 10 ppb limit — compliant, and the city publishes the standard advisory language about it. It is the most common reason Sonoma homeowners ask us about reverse osmosis at the kitchen sink.
Old housing, with a genuinely historic core
The Plaza is a National Historic Landmark district, laid out in 1835, with Mexican-era adobes, a Victorian layer and early-1900s buildings around it, and a large post-war stock beyond. Roughly half the city’s housing predates 1981 and about a fifth predates 1961. In that older stock, galvanized supply and clay or cast iron laterals are routine — and a camera inspection of the lateral is worth more than any amount of guessing.
About the water
Roughly 90 percent of Sonoma’s supply is Russian River water delivered by aqueduct, with six city wells as a supplement. The system runs 4,404 connections and 58 miles of main. Practically: the water is soft to moderately hard, so scale is less of an issue than elsewhere in the county — but manganese above the aesthetic guideline and iron in the supply mean staining and sediment are more of one. We will test before recommending anything, and we will tell you if the honest answer is that you do not need equipment.
About sewers and permits
Wastewater in Sonoma is handled by the Sonoma Valley County Sanitation District, operated by Sonoma Water, which serves the city plus eight unincorporated valley communities including Boyes Hot Springs, Agua Caliente, Fetters Hot Springs, El Verano and Glen Ellen. Plumbing permits come from the City of Sonoma Building Division at The Plaza. We pull the permit and meet the inspector.
Sonoma neighbors, in their words
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We moved into a house that needed some sewer work done, called around and got three estimates and we decided to work with Simeone. From the first time we chatted... read more Jordan L.
11/12/2025 Amazing people! They really saved my butt on this one. They were able to quickly come out and line a pipe. Very professional. Did an amazing job. Gina and... read more Michael O.
10/30/2025 I have an old family cabin on the Russian River that is complicated to access (it's actually on a trail). With flooding in the area it got even harder. Gena... read more Liz R.
3/11/2025 - Friday night a few weeks. I received an email from windsor water department. Saying I was using 3 too 4 times. I searched the 3 access and 9 single family... read more Peter M.
9/04/2024 We recently had Simeone Plumbing replace our aging 75-gallon water heater, recirculating pump and leak detector. They responded quickly to our inquiry and Domenic himself came out to review... read more K T.
8/10/2024 Very happy with the service we received! I needed my water heater replaced. They were so quick to respond and got the job done the next day! And the price... read more SJ K.
7/18/2024 - I have worked with Simeone for years now, and they are amazing. Their plumbers, their office, and their ownership have been nothing but responsive and helpful and always make... read more Dee Dee G.
11/20/2023 Our old boiler died. The local plumbing company gives terrible service, and quoted an outrageous price for a new boiler. We contacted a top notch boiler manufacturer, and they... read more Lorna E.
4/13/2023
Sonoma plumbing questions, answered
Do I need a water softener in Sonoma?
Probably not, and be careful who tells you otherwise. Sonoma’s city wells test around 56 ppm, which is soft, and the imported supply around 92 ppm. That is well below what most of Sonoma County deals with. If you are seeing staining or specks, the cause here is usually manganese and iron, not hardness — and that needs different equipment.
Why do I get dark specks or staining from my taps?
Manganese, most likely. The Sonoma Water supply serving the valley averages 58 ppb manganese against a 50 ppb aesthetic standard, and iron has been recorded as high as 800 ppb. Neither is a health issue, but both stain fixtures and settle in water heaters. Filtration aimed at manganese and iron is the fix.
Should I worry about arsenic in Sonoma water?
The city’s wells average 8.1 ppb against a 10 ppb limit and have tested up to 10.0, so it is close to but within the standard, and the city publishes an advisory about it. If you would rather not have it at the kitchen tap, reverse osmosis handles it and we install it.
My house is near the Plaza and it is old. What should I check first?
The sewer lateral. Homes in the historic core are old enough that clay or cast iron laterals are the norm, and clay joints are where roots get in. A camera inspection tells you whether you are looking at roots, a belly or a break, and whether it can be lined rather than dug up.
Do I need a permit to replace a water heater in Sonoma?
Yes — through the City of Sonoma Building Division at The Plaza. It covers seismic strapping, venting, expansion tank and the drain pan and discharge line. We pull it and meet the inspector.
Do you serve the rest of Sonoma Valley?
Yes — Boyes Hot Springs, Agua Caliente, Fetters Hot Springs, El Verano, Glen Ellen and the valley generally, plus the rest of Sonoma County.
Need a plumber in Sonoma? Let’s get it scheduled.
Same-day appointments often available across Sonoma County.