Whole House Water Softeners in Cross Roads

Mustang Special Utility District tests its water inside Cross Roads. Three of the four disinfection by-product sampling points in the district's 2025 report are in town, at 101 W. Oak Shores Drive, 1801 Tipps Road and 9113 King Ranch Drive; the fourth is in Oak Point. The district's Hathaway well and its Plant 12 stand at U.S. 377 and Dr. Griffin Road in Cross Roads, with a 1 million gallon elevated tank on Dr. Griffin Road, so part of what the town drinks is pumped from directly beneath it. The remainder of the district's groundwater comes from wells spaced up the U.S. 377 corridor toward Pilot Point, and the balance of the supply is lake water bought from Upper Trinity, which can send it from either of its two plants, Taylor in Lewisville or Harpool at Providence Village. The same federal record carries two more Cross Roads entries, an active compliance sampling point at U.S. 377 and Dr. Griffin and a retired one at 7930 Highway 377, both of them on the Hathaway side of town.

The 4.773 ppm hardness figure for Cross Roads is the district's 2025 average for that groundwater, printed on page 10 of the report, where the 2025 samples ran from 3.68 up to 5.48 ppm as calcium carbonate. It is soft on the USGS scale, where soft runs up to 60, and converts to roughly 0.28 grains per gallon. An older line in the same table, hardness as calcium and magnesium measured in 2016, read 5.24 ppm with a range of 4.55 to 6.01, so the wells have tested this way for years. The page also prints sodium at 222 ppm, total alkalinity at 530 ppm and total dissolved solids at 734 ppm against a secondary limit of 1,000: water that carries a good deal of dissolved mineral, almost none of it the calcium and magnesium that leave scale in a kettle. Calcium itself is 1.22 ppm and magnesium 0.420. The report gives no hardness line for the purchased Upper Trinity water, and the wholesaler's 2025 report is silent on it too.

The three Cross Roads sampling sites exist because the district has to measure chlorination by-products where the water actually sits in the pipes, and the same logic applies to hardness: the only number that describes a Cross Roads tap is one measured at a Cross Roads tap. On a day when the wells carry the load the water is soft and a softener idles; when lake water is moving through the Dr. Griffin Road tank it is not. Dallas, which also treats Lewisville Lake water, puts its own system at 120 to 155 mg/L, call it seven to nine grains, and that is what a lake-water day can look like. Plan a softener around the top of what the free water test turns up at your tap rather than around the 4.773 average, so it is ready for the hard weeks and simply rests through the soft ones. The 2025 by-product results differ from one Cross Roads street to the next: total trihalomethanes ran a locational average of 20 ppb at Oak Shores Drive, 16 at Tipps Road and 30 at King Ranch Drive, with haloacetic acids at 11, 8 and 17 ppb against limits of 80 and 60. Those are disinfection figures, not hardness, but they show that the water in different parts of town is not identical on a given day.

Sources: Mustang SUD 2025 Annual Drinking Water Quality Report · U.S. EPA Envirofacts SDWIS: water system facilities for TX0610036 · Upper Trinity Regional Water District: Water Treatment and Delivery · Upper Trinity Regional Water District 2025 Consumer Confidence Report · City of Dallas memorandum, December 1, 2023: Community Water Fluoridation Follow Up