The Aquasana OptimoH2O has impeccable filtering, here are some of the main contaminants it can reduce or remove:
- Lead: 96.6%
- Chlorine: 97.66%
- Arsenic: 97.6%
- Cysts: >99.99%
- Emerging compounds: >94.2%
- PFAS: 96%
- Asbestos: 99%
Performance data sheet
Being tested and certified by the NSF to NSF/ANSI standards 42, 53, 58, 401 + P473 to remove more than 80 contaminants, it is one of the most comprehensively certified systems available. In comparison, more than 50% of under-sink water filters on the market do not have any certifications adhering to NSF standards, and this has 5 of them.
The Aquasana OptimoH20 utilizes a reverse osmosis membrane to reduce 14 impurities, and a patented Claryum filtration method to reduce 60 other contaminants. The filtering process is finished by remineralizing the filtered water with healthy amounts of calcium, magnesium, and potassium, which provides alkaline, pH balanced water. Here is a breakdown of the 3 stages + remineralization:
- Carbon filtration: Reduces organic chemicals, VOCs and MTBE
- RO membrane filtration: Filters out dissolved solids smaller than 1 micron including heavy metals.
- Claryum filtration: Targets chlorine and chloramine (aesthetic issues)
- Remineralization: Healthy amounts of minerals are absorbed back into the purified water to raise the pH level to a balanced level.
The Aquasana OptimoH20 is also our best under-sink water filter for well water. With over 13 million American households relying on well water for drinking, it’s important to keep the water you drink from your well clean. Well water can have microorganisms such as bacteria, viruses and parasites in it, as well as nitrates, heavy metals, organic chemicals, radionuclides, and fluoride.
Essentially anything that can contaminate water can be in a well water source depending on where you live. So you’ll want to get a powerful filtering system to cover a variety of needs, especially for bacteria, from our research only 29% of under-sink water filters offer bacteria reduction. The Aquasana filters 99% of bacteria, putting it in the top 1%.
The filter life for the Aquasana Optimo is solid with the Carbon and Clayrum filters needing to be replaced every 6 months or 365 gallons, which will cost you ~$65. The RO membrane needs to be changed every 1-2 years according to Aquasana and will cost ~$60, and the remineralizer costs ~$30 and needs changing once a year. If you use less water in your home than you’ll only need to replace the RO membrane once every 2-3 years.
The total system and running cost (filter replacements) for 5 years will cost approximately ~$815, which is an amazing deal considering you are getting the best under-sink water filter on the market.
The system can give you up to 32 gallons per day, to apply this practically, men require about a gallon of water a day, and women require just under 3/4 of a gallon a day according to the Mayo Clinic. So if you take this into account, it can provide enough drinking water for a large family.