City of Plano Water Quality (Texas) – 2024 Report Results

We read 30 results from City of Plano’s 2024 water quality report. No results over a legal limit; 8 above a health goal or guideline.

Serves about 288,800 people · Water system ID TX0430007 · Read the district’s 2024 report (opens in a new tab)

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Results from the 2024 report

Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.

Contaminant	Result	Health goal	Legal limit	What it means
Bromatesingle sample · range 9.19 to 9.19 · NTMWD Leonard plant · 2024 report, page 11	9.19 ppb	0.1 ppb	10 ppb	Above the health goal92x the health goal
Chloriteaverage · NTMWD Wylie plant · 2024 report, page 7	0.19 ppm	0.05 ppm	1 ppm	Above the health goal3.7x the health goal
Copper90th percentile of homes tested, 1 over the action level · Customer taps · 2024 report, page 6	1.01 ppm	0.3 ppm	1.3 ppm (action level)	Above the health goal3.4x the health goal
Gross beta (radioactivity)highest measured · range 5.3 to 5.3 · NTMWD Wylie plant · 2024 report, page 7	5.3 pCi/L	0 pCi/L	50 pCi/L	Above the health goalThe health goal is zero
Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2024 report, page 6	2.97 ppb	0.2 ppb	15 ppb (action level)	Above the health goal15x the health goal
Manganesehighest measured · range 0.03 to 0.08 · NTMWD Wylie plant · 2024 report, page 10	0.08 ppm	—	0.05 ppm guideline	Above the guideline1.6x the guideline (taste, odor or stains; not a health limit)
pHhighest measured · range 7.4 to 8.9 · NTMWD Wylie plant · 2024 report, page 10	8.9	—	—	Outside the normal rangeAlkaline water can leave scale
Total dissolved solidshighest measured · range 271 to 509 · NTMWD Wylie plant · 2024 report, page 10	509 ppm	—	500 ppm guideline	Above the guideline1x the guideline (taste, odor or stains; not a health limit)
Atrazinehighest measured · range 0.1 to 0.1 · NTMWD Wylie plant · 2024 report, page 8	0.1 ppb	0.15 ppb	3 ppb	Below the health goal
Bariumhighest measured · range 0.04 to 0.06 · NTMWD Wylie plant, highest of 2 sources · 2024 report, page 7	0.06 ppm	2 ppm	2 ppm	Below the health goal
Chloramineaverage · range 0.1 to 3.88 · Distribution system · 2024 report, page 6	2.53 ppm	None set	4 ppm	Below the legal limit
Chloridehighest measured · range 15.4 to 95.3 · NTMWD Wylie plant · 2024 report, page 10	95.3 ppm	—	250 ppm guideline	Within the guideline
Chlorine dioxideaverage · printed as 0.027 ppm · NTMWD Wylie plant · 2024 report, page 7	27 ppb	None set	800 ppb	Below the legal limit
Cyanidehighest measured · range 28.5 to 128 · NTMWD Wylie plant, highest of 2 sources · 2024 report, page 7	128 ppb	150 ppb	200 ppb	Below the health goal
Disinfection byproducts (HAA5)highest running annual average · range 12.4 to 36.5 · Distribution system · 2024 report, page 6	30 ppb	None set	60 ppb	Below the legal limit
Disinfection byproducts (TTHM)highest running annual average · range 20.6 to 57.3 · Distribution system · 2024 report, page 6	41 ppb	None set	80 ppb	Below the legal limit
Fluoridehighest measured · range 0.32 to 0.71 · NTMWD Wylie plant, highest of 2 sources · 2024 report, page 7	0.71 ppm	1 ppm	4 ppm	Below the health goal
Nitrate (as N)highest measured · range ND to 0.36 · Distribution system · 2024 report, page 6	0.36 ppm	10 ppm	10 ppm	Below the health goal
Sulfatehighest measured · range 39.6 to 165 · NTMWD Wylie plant · 2024 report, page 10	165 ppm	—	250 ppm guideline	Within the guideline
Turbidity (cloudiness)highest measured · NTMWD Wylie plant · 2024 report, page 9	0.93 NTU	None set	1 NTU	Below the legal limit
Alkalinityhighest measured · range 56.5 to 128 · NTMWD Wylie plant · 2024 report, page 10	128 ppm	None set	None	No health limit
Bromodichloromethanehighest measured · range 7.7 to 20.4 · Distribution system · 2024 report, page 6	20.4 ppb	None set	None	No health limit
Bromoformhighest measured · range 1.15 to 2.07 · Distribution system · 2024 report, page 6	2.07 ppb	None set	None	No health limit
Calciumhighest measured · range 35.4 to 66.5 · NTMWD Wylie plant · 2024 report, page 10	66.5 ppm	None set	None	No health limit
Chloroformhighest measured · range 5.09 to 20.1 · Distribution system · 2024 report, page 6	20.1 ppb	None set	None	No health limit
Dibromochloromethanehighest measured · range 5.68 to 14.9 · Distribution system · 2024 report, page 6	14.9 ppb	None set	None	No health limit
Hardnesshighest measured · range 6.14 to 11.8 · NTMWD Wylie plant · 2024 report, page 10	11.8 gpg (202 ppm)	—	—	Very hard
Magnesiumhighest measured · range 5.88 to 9.84 · NTMWD Wylie plant · 2024 report, page 10	9.84 ppm	None set	None	No health limit
Nickelhighest measured · range 4.8 to 6.7 · printed as 0.0067 ppm · NTMWD Wylie plant · 2024 report, page 10	6.7 ppb	None set	None	No health limit
Sodiumhighest measured · range 35.5 to 88.7 · NTMWD Wylie plant · 2024 report, page 10	88.7 ppm	None set	None	No health limit

Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper. 1 number we weren’t sure about is held back until a person checks.

EPA testing for PFAS and lithium

EPA’s own nationwide testing (UCMR 5) found these in City of Plano’s water between Feb 2025 and Nov 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.

PFBS3.1 pptFound in 1 of 4 samples · highest resultNo federal limit in force for this one

Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.

What you can do

Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.