Utility reports across the valley run from 7 to more than 12 grains per gallon, and well water can go far higher. Here is what that means for your glass and fixtures and what to do about it.
Hard water is simply water carrying dissolved minerals. When it dries, the water leaves and the minerals stay. In the Salt Lake Valley, that happens on every shower door, faucet and sink, every day.
This guide sets out the local numbers from each utility in plain terms, explains why the problem changes with the season, and covers what cleaning can and cannot fix.
Salt Lake City. Public Utilities reports total hardness of 136 to 212 parts per million at its three canyon treatment plants, about 8 to 12.4 grains per gallon, and 154 to 571 ppm from its wells and springs. Its water comes mainly from Wasatch mountain streams such as City Creek, Parleys Creek and Big and Little Cottonwood Creeks, plus deep wells, springs and treated water from regional districts. Parts of Millcreek, Holladay and Cottonwood Heights are on this system too.
Jordan Valley. Jordan Valley Water Conservancy District wholesales water to South Jordan, Draper, West Jordan, Riverton and Herriman, and reported 2025 total hardness averaging 182.4 milligrams per liter, with a maximum of 381. South Jordan rates its water as hard, at 7 to 10 grains per gallon. Draper's 2025 report lists total dissolved solids up to 708 ppm, a related measure of what is left in the water.
Murray. Murray draws from 19 deep wells and 8 springs, and its 2025 report lists an average hardness of 194 milligrams per liter, or 11.4 grains per gallon.
Your own address matters, so look up your utility's latest report. Sandy is served partly by Jordan Valley at retail, for example, so even neighbors in a single city may not have identical water.
Salt Lake City says that in summer, when mountain stream runoff drops, it blends in more groundwater from wells, which it describes as harder than stream water. At the same time, July averages a 94 degree high and just 0.49 inches of precipitation, so water dries on surfaces almost at once. Sprinklers that hit windows leave the same kind of marks outside. Harder water and faster drying make the summer months the hardest on your glass.
The trick is to deal with water before it dries. These habits take seconds, and they do more than an occasional heavy scrub.
A One-Time Deep Clean treats shower glass for hard water spots and details faucets, which handles the kind of film most homes have. The first visit of a Recurring House Clean does the same as an Initial Deep Clean, and regular visits keep it from returning to that level.
Not everything comes back, however. Glass that has sat under minerals for years can etch, which means the surface itself is damaged. That can look cloudy even when perfectly clean. A plumber may be the right call for scale inside fixtures or a water heater, and those jobs are outside any cleaning service. Prices are on the cost page.
A water softener reduces hardness at the tap and makes spotting much less of a problem. It does not remove dust from fans and blinds, so it does not replace regular cleaning. If you have one, tell your cleaner, as it can change how glass and fixtures behave.
You may also have heard about fluoride. Utah House Bill 81 prohibited adding fluoride to public water systems starting May 7, 2025, and Salt Lake City's water no longer has it added. That has nothing to do with hardness, and it does not affect how your glass or fixtures look.
The questions Salt Lake City homeowners ask most often about this topic, answered plainly.
TotalCare Cleaning will service Salt Lake City and surrounding areas with background-checked cleaners and is insured up to $1 million. Re-clean guarantee: if we missed something, tell us by the end of the next day and we come back to fix it. Beyond Clean. TotalCare.
