City of Southlake Water Quality (Texas) – 2025 Report Results

We read 22 results from City of Southlake’s 2025 water quality report. No results over a legal limit; 8 above a health goal or guideline.

Serves about 31,576 people · Water system ID TX2200075 · Read the district’s 2025 report (opens in a new tab)

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Results from the 2025 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
Arsenichighest measured · range ND to 1.1 · listed as a violation in the report · Treated water · 2025 report, page 10	1.1 ppb	0.004 ppb	10 ppb	Above the health goal275x the health goal
Bromateas reported · range ND to 13.7 · listed as a violation in the report · Treated water · 2025 report, page 10	6.17 ppb	0.1 ppb	10 ppb	Above the health goal62x the health goal
Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 9	0.73 ppm	0.3 ppm	1.3 ppm (action level)	Above the health goal2.4x the health goal
Cyanidehighest measured · range ND to 168 · listed as a violation in the report · Treated water · 2025 report, page 10	168 ppb	150 ppb	200 ppb	Above the health goal1.1x the health goal
Gross beta (radioactivity)highest measured · range 7.5 to 7.5 · listed as a violation in the report · sampled 2024 · Treated water · 2025 report, page 10	7.5 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 · listed as a violation in the report · Customer taps · 2025 report, page 9	2.13 ppb	0.2 ppb	15 ppb (action level)	Above the health goal11x the health goal
PFOS (a PFAS)average · range ND to 4 · printed as 0.002 ug/L · sampled 2024 · Entry point (UCMR 5) · 2025 report, page 13	2 ppt	1 ppt	4 ppt from 2029	Above the health goal2x the health goal
Uraniumhighest measured · range 1.6 to 1.6 · listed as a violation in the report · sampled 2024 · Treated water · 2025 report, page 10	1.6 ppb	0.6 ppb	30 ppb	Above the health goal2.7x the health goal
Atrazinehighest measured · range ND to 0.1 · listed as a violation in the report · Treated water · 2025 report, page 10	0.1 ppb	0.15 ppb	3 ppb	Below the health goal
Bariumhighest measured · range 0.05 to 0.07 · listed as a violation in the report · Treated water · 2025 report, page 10	0.07 ppm	2 ppm	2 ppm	Below the health goal
Chloramineaverage · range 0.5 to 3.4 · listed as a violation in the report · Distribution system · 2025 report, page 11	2.3 ppm	None set	4 ppm	Below the legal limit
DEHP (a phthalate)highest measured · range ND to 0.6 · listed as a violation in the report · Treated water · 2025 report, page 10	0.6 ppb	12 ppb	6 ppb	Below the health goal
Disinfection byproducts (HAA5)highest running annual average · range 4.4 to 11.4 · listed as a violation in the report · Distribution system · 2025 report, page 11	10 ppb	None set	60 ppb	Below the legal limit
Disinfection byproducts (TTHM)highest running annual average · range 9.49 to 16 · listed as a violation in the report · Distribution system · 2025 report, page 11	13 ppb	None set	80 ppb	Below the legal limit
Fluoridehighest measured · range 0.21 to 0.74 · listed as a violation in the report · Treated water · 2025 report, page 10	0.74 ppm	1 ppm	4 ppm	Below the health goal
Nitrate (as N)highest measured · range 0.3 to 0.3 · listed as a violation in the report · Treated water · 2025 report, page 11	0.3 ppm	10 ppm	10 ppm	Below the health goal
PFHxS (a PFAS)average · range 4.8 to 4.8 · printed as 0.0048 ug/L · sampled 2024 · Entry point (UCMR 5) · 2025 report, page 13	4.8 ppt	None set	10 ppt from 2029	Below the legal limit
Turbidity (cloudiness)highest measured · listed as a violation in the report · Treatment plant (Fort Worth) · 2025 report, page 9	0.29 NTU	None set	1 NTU	Below the legal limit
PFBA (a PFAS)average · range 5.7 to 8.1 · printed as 0.0069 ug/L · sampled 2024 · Entry point (UCMR 5) · 2025 report, page 13	6.9 ppt	None set	None	No health limit
PFBS (a PFAS)average · range ND to 3.7 · printed as 0.00185 ug/L · sampled 2024 · Entry point (UCMR 5) · 2025 report, page 13	1.85 ppt	None set	None	No health limit
PFHxA (a PFAS)average · range 3.3 to 3.7 · printed as 0.0035 ug/L · sampled 2024 · Entry point (UCMR 5) · 2025 report, page 13	3.5 ppt	None set	None	No health limit
PFPeA (a PFAS)average · range 3 to 3.4 · printed as 0.0032 ug/L · sampled 2024 · Entry point (UCMR 5) · 2025 report, page 13	3.2 ppt	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.

EPA testing for PFAS and lithium

EPA’s own nationwide testing (UCMR 5) found these in City of Southlake’s water between Nov 2023 and Aug 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.

PFOS4.1 pptFound in 2 of 4 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
PFHxS10.7 pptFound in 4 of 4 samples · highest resultNo federal limit in force for this one
PFBS3.7 pptFound in 2 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.