Is Truckee Water Hard? What the 2025 TDPUD Water Report Means for Your Plumbing

What the 2025 Report Says About Truckee’s Water

According to the Truckee Donner Public Utility District 2025 Water Quality Report, the Truckee Main System had an average hardness of 78.0 mg/L, which equals 4.5 grains per gallon. The same report lists other numbers that matter for plumbing:

• Hardness: 78.0 mg/L average (4.5 grains per gallon)
• Calcium: 15 ppm (range 10 to 31 ppm)
• pH: 8.1 (range 8 to 8.2)
• Total dissolved solids: 128 ppm (range 110 to 220 ppm)
• Source: groundwater from 10 deep wells, 120 to 850 feet deep

The report’s hardness table lists 60 to 120 ppm as “Moderately Hard,” so Truckee’s 2025 average of 78 sits in that band. The full figures are in the TDPUD 2025 report.

What “Moderately Hard” Means for Your Plumbing

Hardness is mostly dissolved calcium and magnesium. When hard water is heated or evaporates, some of those minerals are left behind as scale. In a home, that tends to show up in a few predictable places:

• White crust on faucet aerators and showerheads, which can slowly reduce flow.
• Spots and film on glass shower doors and dishes.
• Sediment collecting at the bottom of a tank water heater, where the water is heated every day.
• Scale inside the heat exchanger of a tankless water heater.

At 4.5 grains per gallon, Truckee water is not in the “very hard” range, so most homes manage it with routine maintenance rather than major equipment. The places to watch are the ones that heat water.

Water Heaters Feel It First

A tank water heater that is never flushed slowly fills with mineral sediment. Signs to watch for are popping or rumbling sounds while it heats, hot water running out sooner than it used to, or rusty or cloudy hot water. A tankless unit has no tank to collect sediment, but its heat exchanger can scale up. Tankless manufacturers publish a flushing or descaling procedure in the owner’s manual; follow the interval your model calls for.

If your water heater is making noise or not keeping up, our water heater repair and installation team can flush it, check the anode and tell you honestly whether it is worth repairing.

Hirschdale Is a Separate Water System

If you live in Hirschdale, your water does not come from the Truckee Main System. The 2025 report describes the Hirschdale Water System as a single 270-foot groundwater well, with the water filtered to remove iron, manganese and arsenic. Check the Hirschdale section of the report for its own numbers.

Homes on Private Wells Need Their Own Test

The TDPUD report only covers water the utility delivers. If your Truckee property is on a private well, none of these numbers apply to you. A water test is the only way to know your hardness, iron and other minerals before you choose a softener or filter.

Do You Need a Water Softener in Truckee?

It depends on what you are seeing. Many homes on moderately hard water are fine with simple upkeep. A softener or scale-control system starts to make sense if you are replacing showerheads and aerators often, fighting heavy spotting, or protecting a tankless water heater or other equipment that is sensitive to scale. Test before you buy so the system is sized to your actual water.

Simple Hard-Water Maintenance for Truckee Homes

• Soak faucet aerators and showerheads in white vinegar when you see buildup.
• Flush a tank water heater on a regular schedule to clear sediment.
• Descale a tankless water heater as its manual directs.
• Look up your water in your utility’s annual report, or test a private well.

Frequently Asked Questions

Is Truckee tap water hard?

Moderately. The TDPUD 2025 Water Quality Report gives the Truckee Main System an average hardness of 78.0 mg/L (4.5 grains per gallon), which falls in the report’s 60 to 120 ppm “Moderately Hard” band.

Where does Truckee’s drinking water come from?

The TDPUD 2025 report says the Truckee Main System draws groundwater from 10 deep wells, ranging from 120 to 850 feet deep.

Does hard water damage water heaters?

Hard water leaves mineral sediment in tank heaters and scale in tankless heat exchangers. Regular flushing or descaling helps a water heater keep its efficiency and lifespan.