What does a reverse osmosis system remove from water?

Reverse osmosis removes up to 99% of dissolved contaminants including lead, arsenic, fluoride, chlorine, nitrates, and PFAS. Water₂O RO systems are certified to NSF/ANSI 58 standards.

How much does an RO system cost?

Under-sink RO systems cost $300-$800 installed. Whole-house RO systems range from $2,000-$5,000. Water₂O provides free consultations to recommend the right system for your home.

How often do RO filters need replacement?

Pre-filters and post-filters should be replaced every 6-12 months. The RO membrane lasts 2-3 years. Water₂O maintenance plans include all filter replacements.

Last updated: April 2026

Reverse Osmosis Drinking Water Systems

Enjoy 99% pure drinking water straight from your kitchen tap. Water₂O installs under-sink and whole-home RO systems engineered for Southern California water. Start with a free water test.

Schedule Free Consultation Call (410) 262-9888

Why Choose Water₂O for Reverse Osmosis

Serving Southern California homeowners with professional reverse osmosis since day one. Here's what sets us apart.

Free In-Home Assessment

We evaluate your specific needs before recommending anything. No pressure, no obligation, just honest, expert advice about the right reverse osmosis solution for your home.

Licensed & Insured

All Water₂O technicians are fully licensed, bonded, and insured. We provide documentation before work begins and stand behind everything we do.

Ongoing Support

Our relationship doesn't end at installation. Water₂O provides maintenance plans, warranty service, and responsive support to keep your system performing at its best for years.

Transparent Pricing

You receive a detailed written estimate before any work begins. No hidden fees, no surprise charges, and no pressure tactics, ever.

Local Expertise

Water₂O understands local conditions, building codes, and infrastructure. Our recommendations are informed by real experience in this specific market.

Quality Equipment

We use professional-grade, manufacturer-warranted equipment, not the entry-level systems found at big-box stores. Better equipment means better performance and longer service life.

How Water₂O Delivers Reverse Osmosis in Southern California

1
Free Consultation & Assessment
A certified Water₂O specialist visits your home, evaluates your specific situation, and answers your questions. We test, measure, and assess, then explain your options clearly with no sales pressure.
2
Custom Recommendation & Transparent Quote
Based on the assessment, we provide a written recommendation tailored to your home's needs. Your quote includes all equipment, installation labor, and applicable permits, no hidden costs.
3
Professional Installation
Our licensed technicians complete the installation efficiently with minimal disruption to your home. We follow all manufacturer specifications and local code requirements.
4
Testing & Commissioning
Before we leave, we verify the system is operating correctly, test performance against spec, and walk you through operation and maintenance. You leave the day fully confident in your new system.
5
Ongoing Support & Maintenance
Water₂O offers maintenance plans and is available for any follow-up questions or service needs. We're your long-term partner, not just an installer.

Frequently Asked Questions

How Much Does Reverse Osmosis Cost?

Reverse Osmosis costs vary based on your home's specific needs, existing infrastructure, and system specifications. Water₂O provides free in-home assessments with detailed written quotes, so you know exactly what you'll pay before committing to anything.

How Long Does Reverse Osmosis Take?

Most residential reverse osmosis projects are completed in a single day. More complex installations may take 2 days. During your free consultation with Water₂O, we'll give you a specific timeline for your Southern California project.

Do I Need a Permit for Reverse Osmosis?

Permit requirements depend on the specific work being done and local municipal regulations. Water₂O handles all required local permits as part of our service, we're familiar with local requirements and manage the paperwork on your behalf.

What Warranty Does Water₂O Provide for Reverse Osmosis?

Water₂O provides manufacturer warranties on all equipment and a labor guarantee on all installations. Specific warranty terms are provided in writing before work begins. Most equipment carries 5-10 year manufacturer warranties.

Does Water₂O Provide Reverse Osmosis in Southern California?

Yes, Water₂O serves Southern California and surrounding communities. Call (410) 262-9888 to confirm service availability in your specific neighborhood.

Ready to Get Started with Water₂O?

Water₂O offers free consultations with no obligation in Southern California. We'll assess your needs and provide a clear, honest recommendation.