The two ingredients in water that ruin your coffee, and the ancient story behind them

from Filter Stories - Coffee Documentaries · host James Harper

550 million years ago, earth was perfect. We had perfect water for coffee AND we were living in a vegetarian paradise! But then Earth changed—violently. The planet shifted from a peaceful, plant-eating paradise to a darker, more brutal world. And in this new world, the chemistry of water was forever altered. This is the wild story of how earth-shaking forces and the spirits of long-dead critters ruin your coffees today. This story will help you remember the two invisible ingredients in your water that have a huge impact on coffee flavour and your brewing equipment: calcium and hydrogen carbonate. Read Marcia Bjonerud’s amazing book, Reading the Rocks Please spread the word about The Science of Coffee! Leave a 5 star rating on Spotify Follow me on Instagram and tag me in an Instagram story Write a review on Apple Podcasts Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter Season 3 of The Science of Coffee is made possible by these leading coffee organisations: The Coffee Quest | BWT | TODDY | Algrano | Probat Note: this is a reworked version of my 2022 episode Water for Brewing Coffee. Check out Standart, the award-winning coffee magazine. Get a free magazine and a free bag of coffee by clicking here. Support hundreds of thousands of coffee farmers with Fairtrade. Discover how here. See the Mikafi countertop roaster at the Thermoplan stand (6637) at World Of Coffee Brussels. Not attending? See it here. What does the Marco MilkPal look like to you? WALL-E? Something Steve Jobs would be proud of? Check it out here. "Seize the Moment", the tabletop device from DiFluid that guides your customers through their coffee as it cools. Use code FILTER and this link to get 10% off.

What this episode covers

550 million years ago, earth was perfect. We had perfect water for coffee AND we were living in a vegetarian paradise! But then Earth changed—violently. The planet shifted from a peaceful, plant-eating paradise to a darker, more brutal world. And in this new world, the chemistry of water was forever altered. This is the wild story of how earth-shaking forces and the spirits of long-dead critters ruin your coffees today. This story will help you remember the two invisible ingredients in your water that have a huge impact on coffee flavour and your brewing equipment: calcium and hydrogen carbonate. Read Marcia Bjonerud’s amazing book, Reading the Rocks Please spread the word about The Science of Coffee!Leave a 5 star rating on SpotifyFollow me on Instagram and tag me in an Instagram storyWrite a review on Apple Podcasts Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter Season 3 of The Science of Coffee is made possible by these leading coffee organisations: The Coffee Quest | BWT | TODDY | Algrano | Probat Note: this is a reworked version of my 2022 episode Water for Brewing Coffee. Check out Standart, the award-winning coffee magazine. Get a free magazine and a free bag of coffee by clicking here.Support hundreds of thousands of coffee farmers with Fairtrade. Discover how here. See the Mikafi countertop roaster at the Thermoplan stand (6637) at World Of Coffee Brussels. Not attending? See it here.What does the Marco MilkPal look like to you? WALL-E? Something Steve Jobs would be proud of? Check it out here."Seize the Moment", the tabletop device from DiFluid that guides your customers through their coffee as it cools. Use code FILTER and this link to get 10% off.

NOW PLAYING

The two ingredients in water that ruin your coffee, and the ancient story behind them

0:00 38:40

1×

No transcript for this episode yet

We transcribe on demand. Request one and we'll notify you when it's ready — usually under 10 minutes.

Share this episode

Similar Episodes

Beating loneliness by bridging the generation gap

Apr 21, 2026 ·13m

Robotics and the Future of Aged Care

Apr 19, 2026 ·16m

The Purpose Paradox: Why Baby Boomers Delay Retirement

Apr 17, 2026 ·13m

A Growing Movement Aims to Prepare All Physicians to Care for Older Adults

Apr 15, 2026 ·12m

Defeating Recurring Charges on Cancelled Credit Cards

Apr 13, 2026 ·11m

If Your Dad Has These 11 Odd Habits, He's More Lonely Than He Admits

Apr 11, 2026 ·16m

Similar Podcasts

Solving for Change MOBIA Technology Innovations Solving for Change welcomes business and technology leaders to share stories of bold business transformation within complex organizations. In an era when technology and markets are changing around businesses, the key to staying competitive is to evolve in response to those changes. MOBIA’s Mike Reeves and Marc LeBlanc investigate business transformation, deconstructing the challenges, ambitions, and market disruptions that drive companies to embark on transformation journeys, and exploring their unique approaches to achieving meaningful outcomes. What sparks leaders to pursue business transformation? How do they overcome the challenges along the way? What are the keys to creating enduring change? Through in-depth conversations with business and technology leaders, Mike and Marc answer these questions and explore how businesses evolve by pulling four key transformation levers: people, process, technology, and culture. Darknet Discussions Darknet Discussions Welcome to "Darknet Discussions," the podcast that gets into the shadows of the internet to bring you the most intriguing, enlightening, and sometimes unsettling stories from the dark web. Hosted by seasoned darknet aficionados, each episode of "Darknet Discussions" explores the intricate dynamics of darknet markets, cybersecurity threats, and the digital underworld. Join us as we interview experts, discuss the latest trends in cybercrime, and shed light on the technologies that operate beneath the surface of everyday internet use. Also, we occasionally go off on a tangent about something completely unrelated. She’s a Hazard to Herself She’s a Hazard Hi there, I’m Mallory, and I’d like to invite you into our world with “She’s a Hazard to Herself!” Join us as we navigate life with Multiple Sclerosis from the seat of my power wheelchair. Discover stories of resilience, family, and the community we’ve built around chronic illness. Whether you’re impacted by MS or want to learn from our journey, there’s something here for you. So why wait? Subscribe to “She’s a Hazard to Herself” on your favorite podcast app and be part of our journey today. Let’s lift each other up, one episode at a time! The Course Mentors Podcast The Course Mentors Hey there, future course creator!Ever feel like turning your know-how into an online course is like trying to solve a Rubik's cube blindfolded? Well, grab your headphones because "The Course Mentors Podcast" is here to be your secret weapon!Meet Aimee and Odette (that's us!), your new best friends in the course creation world. We've been in the trenches for over a decade, and for the last five years, we've been rocking the online course space. Now we're here to spill all our secrets in bite-sized, 15-20 minute episodes that'll fit perfectly in your coffee breaks.No fluff, no filler - just real, actionable advice that'll take you from "um, what's a landing page?" to "holy moly, I just hit six figures!". We're talking everything from crafting your course to marketing it like a pro and building a business that'll have you pinching yourself.Whether you're dreaming of ditching the 9-to-5 grind, adding a sweet extra income str

Frequently Asked Questions

How long is this episode of Filter Stories - Coffee Documentaries?

This episode is 38 minutes long.

When was this Filter Stories - Coffee Documentaries episode published?

This episode was published on July 28, 2025.

What is this episode about?

Can I download this Filter Stories - Coffee Documentaries episode?

Yes, you can download this episode by clicking the download button on the episode player, or subscribe to the podcast in your preferred podcast app for automatic downloads.

URL copied to clipboard!