We read 23 results from City of Boerne’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 22,287 people · Water system ID TX1300001 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
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 alpha (radioactivity)highest measured · range ND to 6 · sampled 2022 · Treated water · 2025 report, page 10 | 6 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Gross beta (radioactivity)highest measured · range ND to 5.2 · sampled 2022 · Treated water · 2025 report, page 10 | 5.2 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 · 2025 report, page 8 | 1.4 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal7x the health goal |
| Radium (combined 226 + 228)highest measured · range ND to 1.27 · sampled 2022 · Treated water · 2025 report, page 10 | 1.27 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumhighest measured · range 0.03 to 0.06 · Treated water · 2025 report, page 9 | 0.06 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorideaverage · Treated water · 2025 report, page 14 | 29 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.97 to 1.21 · Distribution system · 2025 report, page 13 | 1.1 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 8 | 0.19 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest measured · range 3 to 40.2 · Distribution system · 2025 report, page 8 | 40.2 ppb | None set | 60 ppb | Below the legal limit |
| Manganeseaverage · Treated water · 2025 report, page 14 | 0.0021 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range ND to 2.04 · Treated water · 2025 report, page 9 | 2.04 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumhighest measured · range ND to 5.6 · Treated water · 2025 report, page 9 | 5.6 ppb | 30 ppb | 50 ppb | Below the health goal |
| Sulfateaverage · Treated water · 2025 report, page 14 | 71 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · Treated water · 2025 report, page 14 | 317 ppm | — | 500 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · Treated water · 2025 report, page 7 | 0.11 NTU | None set | 1 NTU | Below the legal limit |
| Calciumaverage · range 49.1 to 121 · Treated water · 2025 report, page 14 | 84.9 ppm | None set | None | No health limit |
| Conductivityaverage · Treated water · 2025 report, page 14 | 468 µS/cm | None set | None | No health limit |
| Dibromochloromethanehighest measured · range ND to 24.8 · Distribution system · 2025 report, page 10 | 24.8 ppb | None set | None | No health limit |
| Hardnessaverage · range 11.9 to 22.3 · Treated water · 2025 report, page 14 | 18.8 gpg (322 ppm) | — | — | Very hard |
| Lithiumaverage · range 11 to 20.8 · Treated water · 2025 report, page 15 | 14.5 ppb | None set | None | No health limit |
| Magnesiumaverage · range 19.3 to 38.7 · Treated water · 2025 report, page 14 | 26.6 ppm | None set | None | No health limit |
| Sodiumaverage · range 14.3 to 21.4 · Treated water · 2025 report, page 14 | 18.6 ppm | None set | None | No health limit |
| Total organic carbonhighest measured · range 2.59 to 5.72 · Treated water · 2025 report, page 13 | 5.72 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. 5 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 Boerne’s water between Jul 2024 and Apr 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA6 pptFound in 1 of 20 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS26.3 pptFound in 2 of 20 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS24.7 pptFound in 2 of 20 samples · highest resultNo federal limit in force for this one
- PFBS10 pptFound in 3 of 20 samples · highest resultNo federal limit in force for this one
- Lithium20.8 ppbFound in 4 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.
Radium and uranium
Found: Gross alpha (radioactivity), Gross beta (radioactivity), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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