How Riyadh's water is quietly hurting your coffeeshop — and what to do about it.

Riyadh's municipal water is drawn from a blend of desalinated water and brackish groundwater. Depending on district and season, total dissolved solids (TDS) typically test between 300–800 mg/L. In some areas of the city, readings above 600 mg/L are common during summer months when groundwater draw increases.

The Specialty Coffee Association (SCA) Water Quality Handbook recommends a target TDS of 150 mg/L for brewing, with an acceptable range of 75–250 mg/L. Riyadh tap water sits two to five times above that range before it reaches your machine.

High TDS suppresses the volatile aromatic compounds responsible for brightness and complexity in the cup. It increases perceived bitterness and causes inconsistent extraction — not occasionally, but shift after shift. The grinder is not the problem.

Beyond taste: hard water deposits calcium and magnesium scale inside group heads, boilers, and heat exchangers at a rate that — across HORECA installs we have surveyed in the Gulf — cuts equipment lifespan by up to 40% without treatment. The cost shows up in parts budgets and emergency call-outs long before it shows up in the cup.