How much does water filtration cost in California?

Every home is different. Contact us for a free in-home water test and quote tailored to your home.

What contaminants are in Phoenix tap water?

Phoenix tap water from the Salt River Project and Central Arizona Project typically contains chlorine (disinfectant), total dissolved solids of 464 to 716 mg/L (City of Phoenix 2025 Water Quality Report), and hardness of 172 to 302 mg/L (10 to 17.6 grains per gallon) in the same report. Free water testing from Purest Water Solutions identifies your exact contaminant levels and recommends the right filtration or softener system for your home.

Do I need a water softener in Las Vegas?

Yes. Las Vegas water from Lake Mead is among the hardest in the United States, averaging 278 to 415 mg/L total hardness. Hard water accelerates water heater corrosion, leaves scale on fixtures, and shortens appliance life. A whole-home water softener typically pays for itself within 2 to 3 years through reduced energy costs and appliance replacement savings.

Does Purest Water Solutions offer free water testing?

Yes. Purest Water Solutions provides free in-home water testing for homeowners in California, Phoenix, and Nevada. A technician tests for hardness, chlorine, iron, total dissolved solids, and pH at your tap. There is no obligation to purchase, and results are explained clearly before any system is recommended.

What is reverse osmosis?

Reverse osmosis (RO) is a water purification process that uses a semi-permeable membrane to remove contaminants. Water is pushed through the membrane, leaving impurities behind and producing ultra-pure drinking water.

Where does the RO system go?

Most residential RO systems sit under the kitchen sink, connected to a dedicated faucet. The system is compact and doesn't take up much space.

How much water does an RO system produce?

Our RO systems produce 50-100 gallons per day, more than enough for a typical household's drinking and cooking needs. A storage tank ensures water is always available on demand.

Traditional RO systems do use some water in the filtration process. However, our high-efficiency systems minimize waste, and the water used helps flush contaminants from the membrane to maintain performance.

How much does a reverse osmosis system cost in California?

Every home is different, so contact us for a free quote. We include a dedicated faucet in every quote.

How often do RO filters need replacing?

Pre-filters and post-filters should be replaced every 6-12 months. The RO membrane itself lasts 2-3 years. We offer maintenance plans that handle all replacements on schedule so you never have to think about it.

Is reverse osmosis water better than bottled water?

In most cases, yes. RO water is fresher, costs pennies per gallon, and eliminates the environmental impact of plastic bottles. A single RO system replaces over 3,000 plastic bottles per year for the average family.

Does my Phoenix or Las Vegas home need RO?

Phoenix and Las Vegas have some of the highest TDS levels in the country (400-700+ ppm). While technically safe, this mineral-heavy water affects taste and may contain trace contaminants. RO reduces TDS to under 50 ppm for noticeably better drinking water.

Reverse Osmosis Drinking Water Systems | California, Phoenix & Nevada

Purest drinking water

The ultimate drinking water purification. Our reverse osmosis systems remove up to 99% of contaminants, delivering bottled-water quality straight from your tap.

Get a free water test (949) 873-1129

Purest RO / under-sink

99%

Contaminant removal

Family owned and operated
Licensed and insured
Free in-home water test
33 communities in CA, AZ and NV
Open 24 hours, 7 days a week

Why it matters

The gold standard in drinking water purification for your home.

Ultra-pure water

Removes up to 99% of contaminants including lead, arsenic, fluoride, chlorine, and dissolved solids.

Better tasting

Eliminates the chemicals and minerals that cause bad taste and odor in your tap water.

Eco-friendly

Stop buying bottled water. Reduce plastic waste while saving money on your water budget.

Health protection

Removes harmful contaminants that whole-house filters cannot, providing an extra layer of protection.

What it fixes

Our RO systems eliminate contaminants that standard filters cannot touch.

Lead & Heavy Metals

Arsenic & Fluoride

Chlorine & Chloramines

Pharmaceuticals

Nitrates & Pesticides

Bacteria & Viruses

Total Dissolved Solids

PFAS / Forever Chemicals

For whole-home protection, pair your RO system with a whole house filtration system. RO and softeners serve different purposes: a water softener removes hardness minerals from all water in your home, protecting pipes and appliances, while RO purifies drinking water at a single point. Many homes benefit from both, so consider our combo systems for complete treatment.

Inside the system

Our RO systems

Explore the Purest RO systems. Click the hotspots to learn how each one works.

System components

Purest RO System

6 key components

Tap a numbered marker or a part to see what it does.

How it works

01
Water quality test
We test your tap water for TDS, contaminants, and taste to understand your specific needs.
02
System selection
Based on your results, we recommend the ideal RO system, from basic to alkaline-enhanced.
03
Pure water on tap
Enjoy unlimited purified water instantly.

What is included

Our reverse osmosis systems deliver the purest drinking water with these premium features.

99%+ contaminant removal
Dedicated purified water faucet
Alkaline remineralization option
Smart filter change indicators
Quick-change filter cartridges
Low maintenance operation

Start here

See what your water needs first.

A free in-home test shows hardness, chlorine, iron, total dissolved solids and pH before we recommend anything.

Book a free water test See financing options

Questions

Reverse Osmosis: common questions

Still unsure? Call (949) 873-1129 or read the full FAQ.

RO removes up to 99% of contaminants including lead, arsenic, fluoride, chlorine, pharmaceuticals, nitrates, bacteria, and total dissolved solids (TDS). It provides the most thorough purification available for residential use.

Local service