Water Softeners and Filtration in Plano, TX
Plano was one of the ten original member cities of the North Texas Municipal Water District, and its water still comes from the district. The district's figures for its Wylie plant cover the wholesale supply to Plano.
Get your free water testWhat's in Plano Water
Plano's own water page says that as a district member, its water comes from nearby lakes. The district's 2025 report gives the Wylie plant figures as Plano's wholesale supply, and the district states that its water is safe to drink and use without filtration.
Hardness
5.6 to 11.7grains per gallon (approx.)
96.0 to 200 ppm, Wylie plant, 2025
Chloramines
3.19ppm average
1.32 to 4.20 ppm, 2025
Moderately Hard, Sometimes More
The district puts its hardness down primarily to the minerals in Lavon Lake and calls the treated water moderately hard. Its 2025 range, 96.0 to 200 ppm, starts in the USGS moderately hard band (61 to 120 ppm), but the high end passes the 180 ppm mark the U.S. Geological Survey uses for very hard water. In grains, the range runs from about 5.6 to 11.7.
Little Iron or Manganese
Iron in the Wylie plant's water was below the detection level in 2025, well under the EPA's 0.3 mg/L secondary guideline tied to rusty color and reddish staining, and manganese measured 0.002 ppm, far under the EPA's 0.05 ppm secondary guideline. Turbidity peaked at 0.29 NTU in 2025.
Disinfection and Earthy Odors
Plano says it is important to maintain a chloramine residual above 0.5 mg/L to prevent harmful bacteria growth in the water distribution system. The district's 2025 chloramine readings averaged 3.19 ppm. The Wylie plant also reported chlorine dioxide averaging 0.050 ppm. The district also tracks geosmin and MIB, compounds it describes as causing an earthy, dirt-like odor and a musty, wet-mulch odor.
The Only Way to Know Your Number
A range as wide as 96 to 200 ppm is exactly why a report cannot tell you your number. We test your Plano tap at no cost for hardness, chlorine, iron and sediment, then suggest a system, with no pressure to buy.
What We Install in Plano
Which of these fits your house comes from your test.
Water Softeners
Plano's supply reached 200 ppm in 2025. Whole-home softening stops scale on the water heater, dishwasher and fixtures and gives soft water for laundry and skin.
Whole-Home Filtration
A point-of-entry filter for iron and sediment, ahead of every tap.
Drinking Water Systems
Under-sink reverse osmosis for the water you drink and cook with.
Plano Water Questions
Where does Plano get its water?
From the North Texas Municipal Water District. Plano is a member city, and the district's 2025 report lists its Wylie plant as Plano's wholesale supply.
Do I need a water softener in Plano?
Plano's supply ranged from 96.0 to 200 ppm of hardness in 2025, a wide range. USGS calls hardness a nuisance rather than a health concern. The free in-home test gives your own reading.
Why does Plano water sometimes smell earthy or musty?
The district monitors geosmin, which it says causes an earthy, dirt-like odor, and MIB, which it says causes a musty, wet-mulch odor.
Is Plano water safe to drink without a filter?
The North Texas Municipal Water District says its water is safe to drink and use without filtration. Softening and filtration at home are about hardness, scale and preference.
We Also Serve
We serve Plano and the rest of Collin County, plus Dallas to the south. Nearby pages:
Book a Free In-Home Water Test
Free in-home water tests are available for homes in Plano and across Dallas-Fort Worth.
What happens next
- 1We test your waterIn your home, for hardness, chlorine, iron, and sediment.
- 2We recommend a systemA softener, filtration, reverse osmosis, or a combination. No pressure to buy.
- 3We install itClean, and we walk you through how it works.