What's Missing From Your Tap Water? The Alkaline Difference

Most people assume "filtered water" and "good water" are the same thing. They're not always. Standard filtration is built to strip contaminants out of your water — and the best systems do that well. But many filtration methods, especially reverse osmosis, don't just remove what's harmful. They can strip out nearly everything, including the natural minerals that give water its taste and its character.

What Gets Left Behind (Or Stripped Away)

Water straight from a well-run municipal system, or filtered through a well-designed system, naturally carries trace minerals like calcium, magnesium, and potassium. These are the minerals that give water a clean, rounded taste rather than a flat, empty one. Aggressive filtration methods that strip water down to nearly pure H2O remove those minerals right along with the contaminants — which is part of why some heavily-filtered or reverse-osmosis water can taste noticeably flat.

The Minerals That Matter

Calcium and magnesium are the same minerals responsible for water "hardness" at high concentrations — but in the right balance, they're also what makes water taste rounded rather than sharp or metallic. Potassium is an electrolyte your body uses for basic hydration and muscle function. None of these need to be present in large amounts to make a noticeable difference — it's a matter of balance, not quantity.

Why Balanced pH Matters

Alkaline water sits slightly above neutral on the pH scale, generally in the 8–9.5 range, compared to plain tap water which can vary widely depending on your source. Many people find balanced-pH water simply tastes smoother and easier to drink — and in practice, water that tastes better is water people actually drink more of throughout the day, which matters more for everyday hydration than any single mineral on its own.

We'd rather be straightforward here: alkaline water isn't a cure-all, and we're not going to claim otherwise. What we can say plainly is that filtered water which still carries a natural mineral profile tends to taste better and get consumed more consistently than water that's been stripped completely bare.

How to Actually Check This Yourself

pH is measured on a 0-14 scale, with 7 being neutral — anything below is acidic, anything above is alkaline. Most municipal tap water in the U.S. sits somewhere in the 6.5-8.5 range depending on the source, while properly-mineralized alkaline water typically lands in the 8-9.5 range. You can get a rough read with inexpensive pH test strips from any hardware or pool supply store, though a full water quality report (like the free EWG lookup on our homepage) gives you a much more complete picture, including mineral content and hardness alongside pH.

Worth knowing: pH alone doesn't tell you whether water is well-mineralized or simply stripped-then-artificially-alkalized. Some products raise pH using additives without restoring the actual calcium, magnesium, and potassium that give water its natural taste and mineral balance — which is the distinction that actually matters if taste and mineral content are what you're after.

How Alka75™ Delivers Both

Our Alka75™ under-sink system is built around this exact balance. Its 22-stage filtration process removes lead, PFAS, chlorine, and other contaminants — then, in its final stage, reintroduces calcium, magnesium, and potassium to restore a clean, balanced alkaline profile. The result is water that's both thoroughly filtered and genuinely pleasant to drink, not water that's been filtered into blandness.