We read 17 results from City of Alamo’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 21,065 people · Water system ID TX1080001 · 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 3 to 3 · Treated water (Rio Grande surface water plant) · 2025 report, page 4 | 3 ppb | 0.004 ppb | 10 ppb | Above the health goal750x the health goal |
| Chloriteaverage · range ND to 0.71 · Distribution system · 2025 report, page 3 | 0.38 ppm | 0.05 ppm | 1 ppm | Above the health goal7.6x the health goal |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 3 | 1 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5x the health goal |
| Uraniumhighest measured · range 5.4 to 5.4 · sampled 2023 · Treated water (Rio Grande surface water plant) · 2025 report, page 4 | 5.4 ppb | 0.6 ppb | 30 ppb | Above the health goal9x the health goal |
| Bariumhighest measured · range 0.12 to 0.12 · Treated water (Rio Grande surface water plant) · 2025 report, page 4 | 0.12 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloramineaverage · range 0.5 to 4.8 · Distribution system · 2025 report, page 3 | 2.16 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 3 | 0.05 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Fluorideaverage · Treated water (Rio Grande surface water plant) · 2025 report, page 3 | 0.62 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)average · Treated water (Rio Grande surface water plant) · 2025 report, page 3 | 0.38 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumhighest measured · range 4.6 to 4.6 · Treated water (Rio Grande surface water plant) · 2025 report, page 4 | 4.6 ppb | 30 ppb | 50 ppb | Below the health goal |
| Turbidity (cloudiness)highest measured · Treated water (Rio Grande surface water plant) · 2025 report, page 3 | 0.34 NTU | None set | 1 NTU | Below the legal limit |
| Dibromochloromethanehighest measured · range 2.8 to 8.7 · Treated water (Rio Grande surface water plant) · 2025 report, page 3 | 8.7 ppb | None set | None | No health limit |
| Lithiumsingle sample · Treated water (Rio Grande surface water plant) · 2025 report, page 4 | 48.3 ppb | None set | None | No health limit |
| PFBA (a PFAS)average · printed as 0.00545 ug/L · Treated water (Rio Grande surface water plant) · 2025 report, page 4 | 5.45 ppt | None set | None | No health limit |
| PFHxA (a PFAS)average · printed as .0035 ug/L · Treated water (Rio Grande surface water plant) · 2025 report, page 4 | 3.5 ppt | None set | None | No health limit |
| PFPeA (a PFAS)average · printed as .00335 ug/L · Treated water (Rio Grande surface water plant) · 2025 report, page 4 | 3.35 ppt | None set | None | No health limit |
| Total organic carbonhighest measured · range 2.19 to 6.32 · Treated water (Rio Grande surface water plant) · 2025 report, page 3 | 6.32 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 City of Alamo’s water between May 2024 and May 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium48.3 ppbFound in 4 of 4 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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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