Water hardness by state
How hard is the water in Querétaro?
Tap water in Querétaro averages 6.7 grains per gallon (114 ppm calcium carbonate). That number determines how fast limescale coats your water heater, shower glass and appliances.
Auf Basis von 47 Messungen an 19 Messstellen, 2018 → 2022.
What 6.7 gpg means in Querétaro
Soft water like this leaves little to no scale. Soap lathers easily, appliances stay clean and your water heater keeps its efficiency. Protection is optional — mostly useful if your utility occasionally blends in harder sources.
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.
Wie dieser Wert ermittelt wurde
Mediana de 47 monitoreos de dureza total (DUR_TOT, mg/L CaCO3) en 19 sitios de agua subterránea de la RENAMECA (CONAGUA), 2018-2022. 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 — Querétaro
Is 6.7 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 6.7 gpg (114 ppm), water in Querétaro is classified as Soft water.
Does Querétaro have a limescale problem?
Water in Querétaro averages 6.7 gpg — Soft 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 Querétaro?
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 Querétaro.
Do I need a salt-based water softener at 6.7 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.