This is your hero—the Dwayne “The Rock” Johnson of water filters. Reverse osmosis (RO) forces water through a semi-permeable membrane that’s so picky, it blocks everything except water molecules.
Think of it as a bouncer at a club exclusively for H2O: “Sorry, nitrates—you’re not on the list. Back to the sewer.”
RO systems can remove 90–99% of nitrates. That’s like turning your tap water from a B-rated horror film into a five-star spa experience.
Pro tip: RO units waste a bit of water (about 3–4 gallons for every gallon of clean water), but you can repurpose that waste water for your plants. They don’t mind a little sass.
The Practical Downside
RO systems are not cheap—expect to fork over $150 to $500 for a decent under-sink unit. But hey, it’s cheaper than a lifetime of bottled water and way more eco-friendly.
Will an RO System Remove Nitrates from Drinking Water?
Installation might require a little plumbing kung fu. If you’re not handy, bribe a neighbor who owns a wrench with pizza.
Once it’s set up, you get that smug, superior feeling every time you pour a glass of crystal-clear, nitrate-free water. Worth it.
