Manville WSC Water Quality (Texas) – 2025 Report Results

We read 12 results from Manville WSC’s 2025 water quality report. No results over a legal limit; 6 above a health goal or guideline.

Serves about 39,648 people · Water system ID TX2270033 · 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
Fluoridehighest measured · range ND to 2.07 · Wells · 2025 report, page 5	2.07 ppm	1 ppm	4 ppm	Above the 2 ppm secondary standard1x the 2 ppm secondary standard (EPA's level to prevent tooth discoloration, also used as health guidance); below the 4 ppm legal limit
Gross alpha (radioactivity)highest measured · Wells · 2025 report, page 5	3.5 pCi/L	0 pCi/L	15 pCi/L	Above the health goalThe health goal is zero
Gross beta (radioactivity)highest measured · Wells · 2025 report, page 5	4.6 pCi/L	0 pCi/L	50 pCi/L	Above the health goalThe health goal is zero
Lead90th percentile of homes tested, 1 over the action level · Customer taps · 2025 report, page 4	1.41 ppb	0.2 ppb	15 ppb (action level)	Above the health goal7x the health goal
Radium (combined 226 + 228)highest measured · Wells · 2025 report, page 5	1.39 pCi/L	0 pCi/L	5 pCi/L	Above the health goalThe health goal is zero
Total dissolved solidshighest measured · range 384 to 712 · Wells · 2025 report, page 6	712 ppm	—	500 ppm guideline	Above the guideline1.4x the guideline (taste, odor or stains; not a health limit)
Bariumhighest measured · range 0.03 to 0.16 · Wells · 2025 report, page 5	0.16 ppm	2 ppm	2 ppm	Below the health goal
Chloramineaverage · range 0.64 to 2.64 · Distribution system · 2025 report, page 5	1.38 ppm	None set	4 ppm	Below the legal limit
Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 4	0.25 ppm	0.3 ppm	1.3 ppm (action level)	Below the health goal
Disinfection byproducts (HAA5)highest running annual average · range 7 to 17.8 · Site DBP2-02 · 2025 report, page 4	16 ppb	None set	60 ppb	Below the legal limit
Nitrate (as N)highest measured · range ND to 1.88 · Wells · 2025 report, page 5	1.88 ppm	10 ppm	10 ppm	Below the health goal
Sodiumhighest measured · range 30.9 to 118 · Wells · 2025 report, page 6	118 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. 2 numbers we weren’t sure about are held back until a person checks.

EPA testing for PFAS and lithium

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

PFOA5.9 pptFound in 1 of 20 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
PFOS12.4 pptFound in 7 of 20 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
PFHxS7 pptFound in 7 of 20 samples · highest resultNo federal limit in force for this one
PFNA24.3 pptFound in 3 of 20 samples · highest resultNo federal limit in force for this one
PFBS10 pptFound in 8 of 20 samples · highest resultNo federal limit in force for this one
Lithium83.8 ppbFound in 17 of 20 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)

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.