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

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

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

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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. How does Perfect Moose detect what kind of milk is in the pitcher? Click here to find out. What kind of racing car does the Gaggia Classic GT home espresso machine remind you of? Use discount code FS202610 to get 10% off. What does the Marco MilkPal look like to you? WALL-E? Something Steve Jobs would be proud of? Check it out here.

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Getting great water for coffee, step-by-step. Part 2: How to measure and treat your water

Getting great water for coffee, step-by-step. Part 2: How to measure and treat your water

Water massively impacts your coffee’s flavours. But most of us struggle to fix our water because water science is confusing…   …until now! In this special collaboration with Lucia Solis (Making Coffee...

14 Juli 202543min

Getting great water for coffee, step-by-step. Part 1: Alkalinity, hardness and why it matters

Getting great water for coffee, step-by-step. Part 1: Alkalinity, hardness and why it matters

Water massively impacts your coffee’s flavours. But most of us struggle to fix our water because water science is confusing…   …until now! In this special collaboration with Lucia Solis (Making Coffee...

14 Juli 202526min

Farm to port: why specialty costs more

Farm to port: why specialty costs more

Every time we open a bag of beautiful specialty coffee — like Erick Bravo’s from Finca El Chaferote in Huila, Colombia — we’re drinking something that’s been on a long journey.   And I mean long! Ove...

23 Juni 202554min

Why one Colombian farmer chose specialty, and the other walked away

Why one Colombian farmer chose specialty, and the other walked away

I travel to Colombia’s Huila region to answer a question that’s puzzled me for years: if specialty coffee pays more, is better for the environment, and brews tastier cups—why don’t more farmers grow i...

9 Juni 202546min

The hard business of selling beautiful coffee, part 2

The hard business of selling beautiful coffee, part 2

Volume. Cheap. Lame flavours. This is the traditional way of growing coffee in Brazil, and almost every farm does it this way.    But what if you wanted to produce beautiful, distinctive flavours inst...

19 Maj 202539min

The hard business of selling beautiful coffee, part 1

The hard business of selling beautiful coffee, part 1

Volume. Cheap. Lame flavours. This is the traditional way of growing coffee in Brazil, and almost every farm does it this way.    But what if you wanted to produce beautiful, distinctive flavours inst...

19 Maj 202529min

The Speed of Heat: How to roast more coffee, faster!

The Speed of Heat: How to roast more coffee, faster!

To roast coffee faster, you need to turn up the heat….right?   No!    In this episode, we explore the three powerful methods of heat transfer that revolutionised roasting. We’ll journey from humble be...

24 Mars 202552min

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