You wipe the faucet, and a day later the white ring is back. The glass shower door has gone cloudy, and the showerhead sprays sideways from a couple of clogged nozzles. That is mineral scale, and how much of it you deal with depends on where your water comes from.

Hardness varies from city to city across the Valley. Fresno and Clovis report hard to moderately hard water, while some systems, such as Hanford and Tulare, report soft water, so your own utility’s annual water quality report tells you how much this matters in your home.

How hard is the water here?

Hardness is mostly dissolved calcium and magnesium, reported as calcium carbonate. The U.S. Geological Survey classifies 0 to 60 milligrams per liter as soft, 61 to 120 as moderately hard, 121 to 180 as hard, and more than 180 as very hard. Local water reports show how much it varies:

• The City of Fresno’s 2025 water quality report lists an average total hardness of 129 milligrams per liter, with detections from 87 to 150. That average sits at the low end of the hard range.

• The City of Clovis’s 2025 report lists groundwater averaging about 118 parts per million, with a range from 65 to 280. Its treated Kings River surface water averaged far lower, and about a third of the city’s system was served by surface water that year.

In other words, two houses a few miles apart can have noticeably different water. Water utilities are required to publish an annual water quality report, often called a Consumer Confidence Report, so look up the one for your address. Homes on private wells should be tested. The City of Fresno’s report also notes that total hardness isn’t a regulated standard; it is listed because many customers ask about it.

Reports don’t all use the same units. Some list milligrams per liter and some list parts per million, which are effectively the same for water, while softener companies often use grains per gallon. Check the units before comparing numbers, and remember that smaller towns, unincorporated areas, and private wells all draw from their own sources.

What minerals do to a kitchen or bath

When hard water evaporates, it leaves minerals behind. On fixtures, that shows up as white rings and crust around aerators and handles. In showers it combines with soap to form soap scum, and the USGS notes that hard water takes more soap or detergent to get things clean.

Inside pipes and water heaters, scale builds up over time and can lower water pressure and efficiency. None of that means you need special fixtures. It means some choices are much easier to keep looking new than others.

Faucets and showerheads

• Finish. Brushed and satin finishes hide water spots better than polished chrome. Dark finishes, especially matte black, show white mineral marks readily.

• Nozzles. Showerheads with soft rubber or silicone nozzles let you rub scale off with a thumb instead of soaking the whole head.

• Aerators. Faucets with standard, removable aerators are easy to clean or replace when scale builds up.

• Cartridges. Ceramic disc valves are standard on quality faucets. Choose a brand with easy access to replacement cartridges and parts.

• Sprayers. On pull-down kitchen faucets, look for spray faces that wipe clean easily.

Our kitchen sinks and faucets page covers sink materials and faucet styles. Whatever you choose, keep the manufacturer’s care instructions, since some finishes call for specific cleaners. Touchless kitchen faucets add a sensor and a valve to the system, so ask how their inlet screens are cleaned and how easy replacement parts are to get.

Shower glass, tile, and grout

Glass shows hard water faster than anything else in the bathroom. Frameless panels have fewer metal tracks and channels where mineral and soap residue collect, and a squeegee after each shower does more than any cleaner. Some glass suppliers offer factory-applied protective coatings that help water sheet off, so ask what’s available if you’re planning a walk-in shower.

On tile, larger formats mean fewer grout lines to scrub. Grout and sealer choices matter too, since denser grouts resist staining and haze better than basic cement grout. Our shower tile and waterproofing page and our tile versus acrylic shower comparison cover the tradeoffs.

Natural stone needs extra care. Marble, limestone, and travertine can be etched by acidic cleaners, including vinegar, which is a common home remedy for water spots. Use a cleaner made for stone.

Toilets, sinks, and the rest of the room

Toilets with skirted sides and smooth glazing are easier to wipe down, which matters when minerals collect. Undermount sinks avoid the crusty edge that forms around a drop-in rim. In the kitchen, stainless steel sinks show water spots, and darker composite sinks can show a white mineral film, so look at samples with your own water in mind.

Inside the tank, minerals can build up on the fill valve and flapper over time, which shows up as a slow refill or a toilet that runs. Those are inexpensive parts, and a toilet from a maker with readily available parts makes the fix simple.

Appliances, water heaters, and access

Hard water affects more than what you see. Dishwashers can leave spots and film on glassware, and water heaters collect scale over time. The USGS notes that scale from heated hard water can shorten the life of equipment, raise water heating costs, and lower the efficiency of electric water heaters.

For a remodel, that mostly means planning for access. Keep shutoff valves reachable, leave room to service a water heater that sits near the bathroom, and choose fixtures whose cartridges, aerators, and filters can be replaced without opening a wall. Work on the water heater itself or its connections belongs to licensed plumbing trades.

Softeners and filters

If hard water bothers you throughout the house, whole-house treatment is the bigger fix. In California, water conditioning is its own specialty license classification, C-55, and a softener or filtration system is separate equipment with its own plumbing connections. It’s worth deciding before the remodel, so space and connections can be evaluated during the in-home consultation along with any work by licensed plumbing trades.

Even without treatment, a simple routine goes a long way. Squeegee the glass, wipe fixtures dry, and clean aerators and showerheads a few times a year. Skip abrasive pads and harsh cleaners that can damage finishes, and if you’re also choosing materials for a sunny room, see our guide to materials that hold up in Central Valley heat.