Cleaning Granite in Hard Temecula Water

Hard water leaves behind whatever it carried in, and what it carries is dissolved calcium and magnesium. On granite countertops in Temecula, CA, those minerals show as a white film at the faucet base and as dry rings where glasses stood, a pattern that granite countertops temecula spam archive (a site about the stone, not a cleaning brand) traces back to evaporation rather than damage to the stone. The film sits on top of the granite and can be removed.
Where the minerals come from

Tap water in the Temecula area draws on the Santa Margarita River watershed along with imported supply, and the result is water with a noticeable mineral load. As a droplet dries on a slab, the water leaves and the minerals stay behind as a pale crust. Over weeks it builds into a film around the faucet, along the back edge, and wherever the sink overflows.
Which cleaners are safe on sealed granite

Warm water, a few drops of dish soap and a soft cloth handle daily work. A cleaner made for stone is pH neutral and will not eat into the sealer. Pick one marked safe for granite, and wipe it dry afterward instead of leaving it to air dry, since the drying is where spots begin.
Why vinegar and lemon are avoided
Vinegar, lemon juice and bathroom descalers are acids. Granite itself resists them better than marble does, but the sealer on top does not, and an etched sealer lets stains in. A shortcut that clears the white film today can open the pores for next month's wine ring. Marble, soapstone and quartz surfaces each react differently to acid, so a cleaner that works on one should not be assumed safe for another.
Removing a hard water film
Lay a damp, warm cloth over the film for a few minutes to soften it, then rub with a soft nylon pad and a drop of neutral cleaner. A film that has been there a long time may need a stone-safe hard water remover, used exactly as labeled and rinsed well. Rinse, dry with a microfiber towel and check the surface in raking light from the window.
Drying habits that stop the spots
A squeegee or towel passed over the sink edge and faucet area after the last wash prevents most buildup. A small tray under the soap pump keeps water off the stone. A fresh sealer coat also helps, because water beads and wipes away instead of drying in place. Check the seam and the sink cutout edges too, since standing water gathers along them.