Let’s Talk Water: The Unsung Hero of Great Beer
When you think of craft beer, your mind probably jumps to hops, malts, or that perfect pour—but the real foundation of a quality brew is water. At Bay Area Brewing Company, we’re proud to say we treat our water like our most essential ingredient—because it is.
Why Water Matters
Beer is about 90-95% water, so it’s no surprise that its quality directly affects the final product. The taste, clarity, mouthfeel, and even fermentation are all influenced by water chemistry. That’s why sourcing, testing, and filtering our water is non-negotiable.
As Brewer Will puts it:
“Water is the backbone of every beer here. That’s why we took the extra step to invest in a proper filtration system—to give you the best, cleanest beers you can drink. That’s what separates a good craft brewery from a great one.”
Local Water + Reverse Osmosis = A Better Brew
We use Rockport’s local water supply, but we don’t stop there. Hidden in a closet at the brewery is our not-so-secret weapon: a professional reverse osmosis (RO) filtration system. This technology strips out minerals, chlorine, and impurities, leaving behind pure, neutral water.
Let’s just say it’s as good as—or maybe better than—that ice water you pick up from a popular nationwide coffee chain we won’t name. (You know the one.)
Why Reverse Osmosis?
• Control: RO gives us a clean slate to work from. We can build our water profile to match any beer style, from a crisp pilsner to a rich stout.
• Consistency: Clean water equals consistent beer. Every time.
• Purity: RO eliminates off-flavors caused by chemical residues or mineral imbalance.
Water Testing + Adjusting = Brewing Precision
Before a single grain touches the mash tun, we calculate and test the water. Using digital meters and water profile calculators, we measure:
• pH
• Chloride, sulfate, and alkalinity levels
Brewer Will walks us through his process:
“I fill the water tank the day before brew day so it’s ready to go. The next morning, I heat it to strike temperature—that’s the temp we mash in at. Then I test it before adding any salt additions. I make any needed adjustments to the water profile based on the beer style, and only then is it time to mash in.”
Different beer styles need different water chemistry:
• Hoppy beers prefer sulfate-rich water to enhance bitterness.
• Malty styles lean on chlorides for a rounder mouthfeel.
• Light lagers demand soft, low-mineral water to stay crisp and clean.
“I do adjust the water profiles for each beer as needed,” Will adds. “That precision is part of what keeps every batch true to style and tasting great.”
Thank you for supporting our small family veteran owned business!
Diedra Amaya, owner
Got questions or topics you want us to explore? Drop them in the comments or message us—this blog is brewed for you.
2 Responses
Pearl Beer advertised they were from the land of 1,100 springs. Back in the time, San Antonio was the largest city that did not have a water treatment plant. All the water came from the Edwards Aquifer. There was no need to treat it. That is where Pearl was brewed. It tasted like horse piss with the foam blowed off with a fart. So clean water does not guarantee good tasting beer.
Donald Mehl, Great comment—and you’re absolutely right that clean water alone doesn’t guarantee good beer! Pearl Brewing (1883–2001) definitely took pride in using water from the Edwards Aquifer, which was known for being naturally clean and mineral-rich. At the time, that was a point of pride—and a cost-saver.
But as you pointed out, just because water is untreated doesn’t mean it’s ideal for brewing. The aquifer’s high alkalinity and mineral content may have been a mismatch for many beer styles. Basic brewing chemistry tells us that alkaline water can interfere with mash pH and create off-flavors, especially in lighter beers.
That’s exactly why we’re highlighting water monitoring and adjustments at Bay Area Brewing Company. We use a reverse osmosis system to start with pure water, then fine-tune the profile based on the beer we’re brewing. Whether it’s a crisp lager or a malty bock, we adjust everything from pH to calcium levels to ensure the water enhances the beer—never works against it.
In a way, your comment proves our point: clean water is a great starting point, but what really matters is using the right water for the right beer.
Cheers to good conversations and better beer! 🍻