Fort Worth water hardness: 6 to 9 grains per gallon
Fort Worth tap water is moderately hard to hard: 6 to 9 grains per gallon (108 to 150 ppm). That range comes from Fort Worth Water's 2025 water quality report (PDF, opens in new tab).
Fort Worth water hardness
Grains per gallon, from Fort Worth Water's 2025 water quality report. Sacramento river water shown for comparison.
Where does Fort Worth water come from?
The city's report says Fort Worth's water comes from a network of lakes, reservoirs and rivers across North Texas. The list includes Lake Worth, Lake Bridgeport, Eagle Mountain Lake, Benbrook Lake, Cedar Creek Reservoir and Richland-Chambers Reservoir.
Lake water in this part of Texas picks up calcium and magnesium from the soil and rock it flows over. Fort Worth's water is softer than San Antonio's aquifer water, but it is hard enough to leave scale.
What this means at home
- Light to moderate scale on faucets and shower heads
- Some spotting on dishes and glasses
- Slow scale buildup in water heaters
- Soap scum on tubs and shower doors
Do you need a water softener in Fort Worth?
It is a judgment call. At 6 to 9 grains per gallon, many homes can live without a softener and just clean fixtures more often. If you are near the top of the range, or you hate spots and scale, a softener helps. Test your tap to see where you fall.
Read do I need a water softener with city water? or see what a softener costs.
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Book my free water testCommon questions
Is Fort Worth water hard?
It is moderately hard to hard. Fort Worth Water's 2025 report lists total hardness of 108 to 150 ppm, which the report also gives as 6 to 9 grains per gallon.
Where does Fort Worth get its water?
The city's report says the water comes from a network of North Texas lakes, reservoirs and rivers. These include Lake Worth, Lake Bridgeport, Eagle Mountain Lake, Benbrook Lake, Cedar Creek Reservoir and Richland-Chambers Reservoir.
Is hard water a safety issue in Fort Worth?
No. The report lists hardness with other items that affect taste and appearance, not health. Hardness causes scale and spots.
Keep reading
DataWater hardness by cityHow hard the tap water is in US cities, from each utility report.
City dataHouston water hardness: what the city report saysAbout 7.9 grains per gallon on average. Hard.
GuideDo I need a water softener with city water?It depends on your city. Here is how to decide.
GuideHow much does a water softener cost installed?Installed price ranges, running costs, and what drives the price.