Brewing coffee at home in Austin, TX

What Austin tap water does to your coffee

Central Texas limestone puts a lot of calcium in the water. Austin is generally reported in the 150–200 ppm range — right at the top of, or just beyond, the ideal window. Cups can taste heavy and dull rather than bright, and scale builds steadily in kettles and machines.

The water comes from Colorado River (Highland Lakes), filtered through limestone country, supplied by Austin Water. Figures above are published city averages — hardness shifts by neighbourhood and season, so your utility's annual water quality report is the number that actually applies to your kitchen.

How to fix it

Cut tap water with distilled to bring hardness down toward 150 ppm, or brew with distilled plus mineral packets for full control. A carbon filter alone will fix taste but not hardness — it does not remove calcium.

If you want the full explanation of why minerals matter, read our water for coffee guide, then set your dose with the brew ratio calculator.

Altitude: what 489 ft changes

At about 489 ft, boiling sits near 211°F; standard brewing temperatures apply with a short rest off the boil.

Brewing in the Austin climate

Long hot seasons make iced pour over and cold brew the default half the year, and humidity means ground coffee clumps and stales quickly — grind fresh per brew rather than batching ahead.

What to buy first in Austin

1. Distilled water or a dilution routine to drop hardness
2. Descaling solution for kettle and espresso machine
3. A grinder you can use per-brew instead of pre-grinding

Not sure where to start overall? The setup quiz recommends a full $100, $300 or $1,000 bundle in about a minute.