Brewing coffee at home in Chicago, IL

What Chicago tap water does to your coffee

Lake Michigan water is reported around 136–150 ppm — almost exactly the 150 ppm hardness the Specialty Coffee Association targets. Chicago genuinely has some of the best brewing water of any major US city straight from the tap. Chlorine taste is the only common complaint, and that is easy to remove.

The water comes from Lake Michigan, supplied by City of Chicago Department of Water Management. 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

A basic carbon filter pitcher or a faucet filter is all most Chicago brewers need — it strips chlorine while leaving the useful minerals in place. Do not use a softening or reverse-osmosis system for coffee water here; you would be filtering out the thing that makes your coffee taste good.

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 594 ft changes

At about 594 ft, water boils near 211°F. That is close enough to sea level that standard brewing temperatures and recipes work unchanged.

Brewing in the Chicago climate

Long cold winters push a lot of Chicago brewing toward hot immersion methods and bigger batch brewers, then flip hard to cold brew in July. A brewer that handles both — or a French press plus a cold brew pitcher — covers the year.

What to buy first in Chicago

1. A carbon filter pitcher (chlorine, not hardness, is the issue)
2. A quality burr grinder — your water is already doing its job
3. A batch brewer or French press for cold mornings

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