Reverse Osmosis Systems in the Twin Cities
Premium drinking water at every tap. Multi stage reverse osmosis systems that remove up to 99 percent of contaminants including PFAS, lead, and chlorine.
AJ Alberts installs reverse osmosis (RO) systems across the Twin Cities and Western Wisconsin. Our multi stage RO systems remove up to 99 percent of contaminants including PFAS, lead, arsenic, fluoride, nitrates, chlorine, and pharmaceuticals. Available as compact under sink units with dedicated drinking water faucets, or whole home systems for total coverage. Locally owned since 1989, especially valuable for Cottage Grove, Woodbury, and Stillwater homes affected by PFAS.
What are Reverse Osmosis Systems?
Reverse osmosis is the most effective home level water purification technology available. RO uses a semi permeable membrane to separate water molecules from dissolved contaminants, producing exceptionally pure water at the tap.
A typical multi stage RO system pushes water through:
- A sediment pre filter to capture particles
- One or more carbon pre filters to remove chlorine and protect the membrane
- The RO membrane itself, which removes the vast majority of dissolved contaminants
- A post filter (often carbon) for final polishing
The result is bottle quality drinking water from your kitchen tap or, in whole home installations, from every tap in the house.
For Twin Cities homes affected by PFAS contamination (particularly Cottage Grove, Woodbury, and Stillwater), reverse osmosis is the most popular and most effective home filtration option.
Signs You Need a Reverse Osmosis System
- You buy bottled water for drinking and cooking
- You are concerned about PFAS contamination in your municipal water
- You live in Cottage Grove, Woodbury, or anywhere in the 3M east metro PFAS plume
- You want to remove fluoride for personal preference
- You have a household member who is immunocompromised, pregnant, or a young child
- Your tap water has chemical taste, chlorine smell, or simply tastes off
- You want to reduce dependency on bottled water for environmental and cost reasons
- Your home is on a private well with elevated nitrate or other contaminant levels
Our Installation Process
Free in home water test
We measure hardness, iron, chlorine, pH, and total dissolved solids on the spot. For PFAS or lead specific testing, we coordinate certified lab testing.
System recommendation
Based on your water profile and household needs, we recommend an under sink RO unit, a whole home RO system, or a combination.
Upfront pricing
You get a clear price before any work begins. No surprise fees.
Professional installation
Most under sink RO installations take two to three hours. Whole home systems take longer. We handle the connection, install the dedicated faucet, and verify performance.
Annual maintenance
RO systems perform best with annual filter replacement. We provide a maintenance schedule and can return for service when filters need replacement.
RO System Options We Install
- Under Sink Reverse Osmosis (Point of Use). The most common configuration. A compact RO unit installs under your kitchen sink and delivers purified water to a dedicated drinking water faucet. Provides bottle quality water for drinking, cooking, ice making, and pet water without taking up counter space.
- Whole Home Reverse Osmosis (Point of Entry). For homeowners who want RO quality water at every tap including showers and laundry. More involved installation, larger system, and significantly higher cost than under sink units. Right for homes with severe contamination concerns or strong preference for purified water everywhere.
- Combined RO and Carbon Systems. Pair RO at the kitchen sink with whole house carbon filtration to remove chlorine and chemical taste from every tap, then deliver premium drinking water at the kitchen faucet. This is the most popular configuration for Twin Cities homeowners concerned about PFAS.
What RO Removes
Multi stage reverse osmosis effectively removes up to 99 percent of:
What This Costs
Reverse osmosis system costs vary based on configuration. Under sink units are the most common and most affordable option. Whole home RO systems are a significant investment. AJ Alberts provides upfront pricing during your free in home water test with no surprise fees. Financing is available.
What Our Customers Say
"After learning about PFAS in our Woodbury water, we wanted protection at the kitchen tap. AJ Alberts installed an under sink RO system. The water tastes amazing and we have peace of mind for our kids."
- Kelly S., Woodbury, MN
"We have an RO system that we love. You can taste the difference, and the install was clean and fast. Annual maintenance is easy."
- Jason R., Cottage Grove, MN
"The whole house RO was a bigger investment but for our specific situation it was the right call. Every tap delivers premium water. Worth every dollar."
- Carrie T., Twin Cities Metro
Serving the Twin Cities Metro
Reverse osmosis is especially valuable for homes in:
- Cottage Grove (most PFAS affected city in the metro, 8 of 11 wells non compliant)
- Woodbury (9 of 20 wells with PFAS health advisories)
- Stillwater (in the 3M plume but not a direct remediation site)
- Any home with concerns about lead, arsenic, fluoride, or trace contaminants
Related water conditioning services:
Frequently Asked Questions
Schedule Your Free Water Test
Premium Drinking Water Starts with Reverse Osmosis.
Schedule a free in home water test with AJ Alberts. We measure your water, walk through RO options, and quote upfront pricing with no surprise fees.