We read 11 results from City of Schertz’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 41,948 people · Water system ID TX0940003 · 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 |
|---|---|---|---|---|
| Gross beta (radioactivity)single sample · sampled 2023 · Treated water · 2025 report, page 7 | 4.9 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Bariumsingle sample · sampled 2023 · Treated water · 2025 report, page 7 | 0.04 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineaverage · range 1.02 to 2.05 · Distribution system · 2025 report, page 6 | 1.67 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 6 | 0.07 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 4.7 · 11409 Ware Seguin Rd · 2025 report, page 6 | 2 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 6.8 to 25.7 · 11409 Ware Seguin Rd · 2025 report, page 6 | 12 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridesingle sample · sampled 2023 · Treated water · 2025 report, page 7 | 0.15 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 6 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Dibromochloromethanehighest measured · range ND to 8.5 · Distribution system · 2025 report, page 7 | 8.5 ppb | None set | None | No health limit |
| Lithiumaverage · range 12.6 to 17.6 · sampled 2024 · Treated water · 2025 report, page 8 | 15.9 ppb | None set | None | No health limit |
| Nickelsingle sample · printed as 0.0017 MG/L · sampled 2023 · Treated water · 2025 report, page 7 | 1.7 ppb | 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 Schertz’s water between Jun 2024 and Dec 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium17.6 ppbFound in 6 of 6 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.
Radium and uranium
Found: Gross beta (radioactivity)
What removes it: Reverse osmosis.
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