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We'll tell you when you don't need a softener · (650) 727-9630

(650) 727-9630
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Tree-lined hillside road through a Peninsula neighborhood

Where we work

Water Filtration in San Mateo & Surrounding Areas, One Crew Start to Finish

Across San Mateo County: Burlingame, Foster City, Hillsborough, Belmont, San Carlos, Redwood City and over SR-92 to Half Moon Bay.

Is your town on the route? (650) 727-9630

The Mid-Peninsula, Covered by the Same People

San Mateo Water Filtration is based in San Mateo and works the towns around it every week. Burlingame, Foster City, Hillsborough, Belmont, San Carlos, Redwood City, Millbrae and San Bruno share the same regional water, so the chloramine story is similar. The plumbing behind the walls is not.

Over the hill, Half Moon Bay and the coastside bring private wells into the mix. Different water, different tests, same crew.

How We Keep Visits Predictable

We know the streets

Alameda de las Pulgas at rush hour, Ralston near the school, the 92 merge. We route around them, which is how we keep arrival windows tight.

Same booking window everywhere

Millbrae gets the same scheduling as downtown San Mateo. You pick a slot, we confirm it, and we text if anything shifts.

One line for every town

(650) 727-9630 reaches the crew directly, whether you're in Foster City or out past Crystal Springs. Your service history follows you.

Towns on Our Regular Routes

Primary city first. Every town below gets the full service list.

  • Home base

    San Mateo

    US-101 & SR-92

    Home base, from Baywood and Aragon to Shoreview and Laurelwood.

  • Burlingame

    El Camino Real

    Older homes near Broadway and Burlingame Avenue, plenty of original plumbing.

  • Foster City

    Foster City Blvd

    Lagoon-side homes and condos, mostly drinking-water and chloramine work.

  • Hillsborough

    I-280

    Large lots and long runs, where whole-house sizing really matters.

  • Belmont

    Ralston Avenue

    Hillside houses with tight garages and tankless heaters.

  • San Carlos

    Holly Street

    Same Cal Water district as San Mateo, same chloramine questions.

  • Redwood City

    Woodside Road

    From downtown condos to Emerald Hills properties with their own quirks.

  • Millbrae

    Millbrae Avenue

    Mid-century homes near the station, regular sediment and carbon work.

  • San Bruno

    I-380

    Ranch homes on the ridge, under-sink RO and whole-house carbon.

  • Half Moon Bay

    SR-92 over the hill

    Coastside wells: sediment, iron, UV and full treatment trains.

  • Between these towns too. If you can see the Bay or the coast from your street, ask.

    Confirm your address at (650) 727-9630

How We Cover the Area

We group visits by corridor. Bayside towns along 101 one block of the week, El Camino towns the next, coastside wells on days when SR-92 is quieter. It keeps drive time down and arrival windows honest.

Installs that need parts we don't carry get scheduled once the parts are in hand, not before. That way the person who measured your water is usually the person who fits the system, and nobody shows up empty-handed.

Services Available in Every Town

The full list applies across the Peninsula. Tap any service for details.

Book a San Mateo-Area Visit

Tell us the town and what you're noticing. We'll find a slot on that week's route and confirm it the same day.

Get on this week's route: (650) 727-9630

By appointment across San Mateo County.