Water hardness by state
How hard is the water in Coahuila?
Tap water in Coahuila averages 19.6 grains per gallon (336 ppm calcium carbonate). That number determines how fast limescale coats your water heater, shower glass and appliances.
Sur la base de 208 mesures issues de 138 points de surveillance, 2022 → 2025.
What 19.6 gpg means in Coahuila
This is hard water: visible scale on fixtures within weeks, clogged shower heads, stiff laundry and a water heater working overtime. Anti-scale protection is strongly recommended.
What it does to your home
Water heater: even a thin layer of scale insulates the heating element and drives energy use up.
Appliances: dishwashers, washing machines and coffee makers scale up and fail years early.
Fixtures and skin: white spots on faucets and glass, dry skin and dull hair after every shower.
Comment cette valeur a été obtenue
Mediana de 208 monitoreos de dureza total (DUR_TOT, mg/L CaCO3) en 138 sitios de agua subterránea de la RENAMECA (CONAGUA), 2022-2025. El abastecimiento mexicano proviene mayoritariamente de acuíferos — valor indicativo del recurso, no de cada red municipal.
CONAGUA — RENAMECA, Resultados de calidad del agua subterránea (consolidado 2012-2025)Statewide average — hardness varies by utility and season. Always verify with your local water quality report.
Frequently asked questions — Coahuila
Is 19.6 gpg considered hard water?
On the US scale, 0–3.5 gpg is soft, 3.5–7 gpg moderately hard, 7–10.5 gpg hard and above 10.5 gpg very hard. At 19.6 gpg (336 ppm), water in Coahuila is classified as Hard water.
Does Coahuila have a limescale problem?
Water in Coahuila averages 19.6 gpg — Hard water. The harder the water, the faster calcium carbonate deposits build up in water heaters, appliances and pipes. Below 3.5 gpg the risk is minimal; above 7 gpg scale becomes a running cost.
How do I find the exact water hardness at my address in Coahuila?
Check your utility's annual water quality report (Consumer Confidence Report) or your water bill, or use our free interactive hardness map. Hardness can vary widely between neighboring utilities in Coahuila.
Do I need a salt-based water softener at 19.6 gpg?
Not necessarily. Salt softeners add sodium to your water and need constant refills. LIMPEO treats limescale with an electromagnetic field — no salt, no chemicals, no maintenance — and keeps healthy minerals in your drinking water.