Water Filtration, Storage Tanks & Rainwater Harvesting in Santa Cruz County
Katie Martin
Santa Cruz County has a water story that most counties do not. Residents in the San Lorenzo Valley communities of Boulder Creek, Ben Lomond, Brookdale, and Felton have watched water sources, water quality, and supply reliability shift over the years. The PFAS contamination issues that affected local water supplies in the early 2020s brought the importance of residential water treatment into sharp focus. Wildfires and infrastructure disruptions reinforced the value of water storage. And the county's longtime culture of sustainability means that rainwater harvesting and gray water systems are not fringe concepts here — they are practical responses to real conditions.
This guide covers the full landscape of residential water systems in Santa Cruz County: water filtration, water storage tanks, tank installation, rainwater harvesting, and gray water systems — what they are, who needs them, and how Travis Martin Plumbing Inc. approaches each.
Travis Martin Plumbing Inc. is a family-owned residential plumber based in Felton, CA, serving Santa Cruz County and the Santa Cruz Mountains. Reach the team by call or text at santacruzcaplumbers.com.
Water Filtration Systems in Santa Cruz County
Whole-house water filtration is one of the most impactful investments a Santa Cruz County homeowner can make for both health and the performance of their home's plumbing systems.
Why water filtration matters in Santa Cruz County.
Water quality in Santa Cruz County varies significantly by source and location. Municipal water supplies in the county serve different communities with water that differs in mineral content, treatment approach, and susceptibility to contamination events. The PFAS situation that developed in the San Lorenzo Valley highlighted how quickly a water supply issue can affect residential households — and how few options there are when you are relying entirely on a municipal supply with no backup filtration or alternative.
Well water, which is the source for many rural and mountain properties in Boulder Creek, Felton, and the surrounding areas, presents its own set of considerations. Without the treatment infrastructure of a municipal supply, well water can carry sediment, bacteria, nitrates, dissolved minerals, and other constituents that vary by location, season, and conditions.
Types of residential water filtration systems.
Whole-house water filtration installs at the main water line entry point to the home, treating all water that enters the house — not just drinking water, but shower water, laundry water, cooking water, and appliance water. Whole-house systems protect both residents and the home's plumbing, water heaters, and appliances from the effects of mineral buildup and particulate.
Sediment filtration is the first stage in most whole-house systems. Sediment filters remove particulate matter — dirt, rust, sand — before water reaches other filtration stages or the home's plumbing fixtures and appliances. For homes on well water or in areas with older pipe infrastructure, sediment filtration is a baseline necessity.
Carbon filtration addresses a wide range of water quality concerns including chlorine and chloramine taste and odor (from municipal treatment), volatile organic compounds, and certain chemical contaminants. Activated carbon filtration is one of the most versatile and widely used residential water treatment technologies.
Water softening treats hard water by exchanging calcium and magnesium ions for sodium ions. Hard water causes scale buildup in pipes, water heaters, and tankless water heater heat exchangers — a real concern in parts of Santa Cruz County with harder water. Water softening extends the life of plumbing fixtures, appliances, and water heaters, and reduces the frequency of maintenance required for tankless units.
Reverse osmosis (RO) systems provide the highest level of point-of-use filtration, removing a very wide range of contaminants including dissolved solids, fluoride, arsenic, nitrates, and certain PFAS compounds. RO systems are most commonly installed at the kitchen sink for drinking and cooking water. For Santa Cruz County homeowners concerned about specific contaminants, RO provides a strong layer of protection at the point of use.
UV purification uses ultraviolet light to disinfect water, killing bacteria, viruses, and other microorganisms. UV treatment is particularly relevant for homes on private well water that does not receive municipal disinfection treatment.
Whole-house water filtration in Santa Cruz County. Travis Martin Plumbing Inc. installs whole-house water filtration, water softening, and drinking water filtration systems throughout Santa Cruz County. The right system for your home depends on your water source, water quality test results, and what outcomes you are trying to achieve. The team can walk you through the options.
Water Storage Tanks in Santa Cruz County
Water storage is not a luxury concept in Santa Cruz County — it is a practical response to the county's real supply vulnerabilities. Power outages disable pump systems. Wildfires in the Santa Cruz Mountains have disrupted water supplies for days and weeks at a time. Drought conditions reduce reservoir levels and trigger restrictions. For homeowners on well water, pump failures can leave a property without water until the repair is made.
A properly designed water storage system provides a buffer against all of these scenarios.
Residential water storage tank types.
Polyethylene storage tanks are the most common choice for residential water storage. Available in capacities from a few hundred gallons to many thousands, poly tanks are cost-effective, long-lasting, resistant to corrosion, and food-safe for potable water storage when manufactured for that purpose. They can be installed above or below ground.
Above-ground storage tanks are the most common installation in Santa Cruz County residential applications. Placement should protect the tank from direct prolonged UV exposure (or use UV-resistant tanks), keep it accessible for maintenance, and accommodate overflow management.
Underground storage tanks provide greater protection from UV, freezing (though Santa Cruz County's climate is mild), and fire ember exposure. Underground installation requires more site work but produces a cleaner visual result and protects the tank from physical damage.
Corrugated steel tanks are a good option for larger capacity needs, particularly on rural properties where the larger footprint of a corrugated steel tank is not a constraint. These tanks have long service lives and are available in capacities suited for agricultural and large residential uses.
Water storage system design considerations.
Capacity depends on your goals and property needs. A basic emergency backup of 500 to 1,500 gallons provides several days of household use for basic needs. A more substantial system for extended supply independence on a rural Santa Cruz Mountains property might involve 5,000 to 20,000 gallons or more.
Connection to the home's plumbing, overflow management, first-flush diversion (for rainwater-fed systems), UV treatment or other disinfection for potable use, and pump systems for gravity-insufficient sites are all part of a complete water storage system design.
Water tank installation in Santa Cruz County. Travis Martin Plumbing Inc. handles water tank installation, water storage tank service, and water system plumbing for residential properties throughout Santa Cruz County, including tank installation in Boulder Creek, Felton, Ben Lomond, Brookdale, and Scotts Valley.
Rainwater Harvesting in Santa Cruz County
Rainwater harvesting in California has undergone a significant legal shift. Until 2012, rainwater collection was largely unregulated and existed in a gray area. Since then, California has actively encouraged residential rainwater harvesting as part of drought response. Santa Cruz County's annual rainfall — concentrated in the winter months, with the San Lorenzo Valley receiving more than coastal areas — makes the county genuinely well-suited for residential rainwater harvesting.
How residential rainwater harvesting works.
Rainwater collection begins at the roof. Roof runoff is directed through gutters to a collection point, where it passes through a first-flush diverter — a device that diverts the first flow of water (which carries the most contamination from the roof surface) away from the storage tank. After the first-flush, cleaner water flows into a storage tank.
From the storage tank, water can be distributed for outdoor irrigation directly, or processed through additional filtration and treatment for indoor non-potable uses (toilet flushing, laundry) or, with appropriate treatment, potable uses.
California regulatory context for rainwater harvesting.
California Senate Bill 1416 (2012) and subsequent guidance established the framework for residential rainwater harvesting. For outdoor non-potable use (irrigation), residential rainwater harvesting is straightforward. For indoor non-potable uses, connection to the home's plumbing is regulated and typically requires a permit. For potable indoor use, treatment requirements are more stringent. Travis Martin Plumbing Inc. can advise on the regulatory requirements for your specific project.
Rainwater harvesting system components.
A complete residential rainwater harvesting system includes roof collection and gutter system, first-flush diverter, conveyance to the storage tank, storage tank (sized to capture and store meaningful seasonal rainfall), overflow management, distribution system for irrigation or indoor use, and filtration/treatment as appropriate for the intended use.
Rainwater harvesting tank installation in Santa Cruz County. Travis Martin Plumbing Inc. handles rainwater tank installation and water system plumbing for rainwater harvesting systems across Santa Cruz County, including rainwater harvesting in Boulder Creek, Felton, Ben Lomond, and throughout the San Lorenzo Valley.
Gray Water Systems in Santa Cruz County
Gray water — the relatively clean wastewater from showers, bathtubs, bathroom sinks, and laundry (everything except toilet waste, which is black water) — represents a significant portion of residential water use that can be redirected to landscape irrigation rather than discharged to the sewer system.
Note on spelling: "gray water" is the standard spelling in California plumbing code and regulatory documents. You will also see "greywater" (the alternative spelling) in search results and some publications — both refer to the same thing.
California gray water regulations.
California's gray water standards are among the most progressive in the country. The California Plumbing Code establishes two tiers of gray water systems:
Laundry-to-landscape systems are the simplest and most affordable entry point. A laundry-to-landscape system redirects washer drain water directly to landscape irrigation using a three-way valve — no surge tank, no permit required for systems meeting the code's basic requirements. This is the most common DIY-accessible gray water system type.
Permitted gray water systems cover more complex configurations — shower-to-landscape, multi-source systems, and systems with surge tanks. These require a permit and must meet California Plumbing Code standards for subsurface distribution, setbacks from structures and property lines, and access for inspection.
Travis Martin Plumbing Inc. handles the plumbing work for both permitted gray water systems and laundry-to-landscape installations in Santa Cruz County. The permit and inspection process is navigated as part of the installation scope.
Who benefits from a gray water system in Santa Cruz County.
Gray water systems are particularly valuable for Santa Cruz County homeowners with landscape irrigation needs. Redirecting shower and laundry water to landscape can meaningfully reduce outdoor water use — a practical benefit in both dry years and drought conditions. For properties with mature trees, fruit trees, or established ornamental plantings, gray water provides a reliable irrigation supplement.
Properties on septic systems benefit from gray water diversion in a different way: every gallon of gray water redirected away from the septic system is a gallon that extends the life and capacity of the drain field.
Gray water system installation in Santa Cruz County. Travis Martin Plumbing Inc. installs gray water systems throughout Santa Cruz County — from laundry-to-landscape setups in Felton and Boulder Creek to permitted multi-source gray water systems across the county.
Water Systems as an Integrated Approach
The most effective residential water approach for many Santa Cruz County properties combines multiple elements: whole-house filtration for water quality, storage capacity for supply resilience, and gray water or rainwater harvesting to reduce consumption and outdoor water demand. These systems work together and can be planned and installed in phases as priorities and budget allow.
Travis Martin Plumbing Inc. brings a full-service perspective to water systems — the team does not only install tanks or only install filtration, but can work with you on a complete approach for your property and your goals.
Serving Santa Cruz County Water Systems Needs
Travis Martin Plumbing Inc. serves water system needs throughout Santa Cruz County, with deep familiarity in the San Lorenzo Valley communities where water supply, quality, and resilience questions are most acute.
Boulder Creek — Rural and semi-rural properties with a mix of well and municipal water, older homes with varying plumbing configurations, and a strong community interest in water independence. Storage and rainwater harvesting interest is high here.
Ben Lomond — San Lorenzo Valley district water, with water quality concerns that have made filtration systems a common addition for homeowners in the community.
Brookdale — Full coverage for water system needs in this smaller community.
Felton — The team's home base. Full water system services with the fastest response in the coverage area.
Scotts Valley — Southern Santa Cruz Mountains coverage, including water filtration and storage systems.
Santa Cruz — City and coastal community water system coverage, including drinking water filtration and gray water system installation.
Frequently Asked Questions
Q: Do I need a whole-house water filter in Santa Cruz County? A: It depends on your water source and quality. Homes on municipal water benefit from carbon filtration for taste and chemical concerns. Homes on well water benefit significantly from a full filtration system including sediment, carbon, and UV treatment. Given past water quality events in the San Lorenzo Valley, many homeowners there have added filtration as a precaution.
Q: Is rainwater harvesting legal in California? A: Yes. California actively encourages residential rainwater harvesting. Simple outdoor irrigation uses are permissive. Indoor non-potable connections require a permit. The team can advise on what applies to your project.
Q: What is a gray water system and is it legal in California? A: Gray water is wastewater from showers, sinks, and laundry (not toilets). California law allows residential gray water systems for landscape irrigation. Simple laundry-to-landscape systems can be installed without a permit. More complex systems require a permit. Travis Martin Plumbing Inc. handles both.
Q: How much water storage capacity do I need? A: For basic emergency backup, 500 to 1,500 gallons covers several days of essential household use. For supply independence on a rural property, 5,000 gallons or more may be appropriate. The right size depends on your household demand, how long you want to be self-sufficient, and whether you are supplementing municipal supply or relying on stored water as a primary source.
Q: Do you install water tanks in Boulder Creek and Felton? A: Yes. Travis Martin Plumbing Inc. installs water storage tanks and water system plumbing throughout Santa Cruz County, including Boulder Creek, Felton, Ben Lomond, Brookdale, and Scotts Valley.
Q: What is the difference between gray water and rainwater harvesting? A: Gray water is wastewater from household use (showers, laundry, sinks) that is redirected to irrigation instead of the sewer. Rainwater harvesting collects rainfall from roof runoff and stores it for irrigation or other uses. Both reduce demand on primary water supplies and can be used together on the same property.
Q: Can water filtration help with the water quality issues in the San Lorenzo Valley? A: Yes. A properly designed filtration system — including carbon filtration, reverse osmosis at the point of use, and UV treatment for well water — addresses the categories of concern that have affected San Lorenzo Valley water supplies. Travis Martin Plumbing Inc. can help you evaluate options appropriate to your water source and concerns.
Q: How do I get started with a water filtration or storage system in Santa Cruz County? A: Call or text Travis Martin Plumbing Inc. through santacruzcaplumbers.com. The team serves all of Santa Cruz County and can advise on the right system for your property, source water, and goals.