What was found in Boerne's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 1431 µg/L 36% of the EPA limit 4000 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019
Highest in the city: 4766 µg/L — FOOTHILLS MOBILE HOME RANCH · 182 people · 2019 | 3/3 | SYR4 |
| Nitrate | 3020 µg/L 30% of the EPA limit 10000 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 3020 µg/L 30% of the EPA limit 10000 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2015 | 3/3 | SYR4 |
| Copper | 229.5 µg/L 18% of the EPA limit 1300 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| TTHM | 83.85 µg/L 105% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| Barium | 55.865 µg/L 2.8% of the EPA limit 2000 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 34.145 µg/L 57% of the EPA limit 60 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| Chloroform | 33.86 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 25.543 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 24.03 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| Lithium | 20.8 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2025 | 1/3 | UCMR-5 |
| Dichloroacetic Acid | 18.7 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 1/3 | SYR4 |
| Gross Beta Particle Activity | 6.535 pCi/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2019
Highest in the city: 14.8 pCi/L — FOOTHILLS MOBILE HOME RANCH · 182 people · 2018 | 2/3 | SYR4 |
| Trichloroacetic Acid | 11.08 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 2/3 | SYR4 |
| Chromium | 10.1 µg/L 10% of the EPA limit 100 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 2/3 | SYR4 |
| Selenium | 9.7 µg/L 19% of the EPA limit 50 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 2/3 | SYR4 |
| Bromoform | 9.365 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6 pCi/L 40% of the EPA limit 15 pCi/L Main supplier: CITY OF BOERNE · 24,769 people · 2019
Highest in the city: 8.305 pCi/L — FOOTHILLS MOBILE HOME RANCH · 182 people · 2018 | 3/3 | SYR4 |
| Dibromoacetic Acid | 7.5 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| Lead | 4.3185 µg/L 29% of the EPA limit 15 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 3.795 pCi/L 76% of the EPA limit 5 pCi/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 3.235 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 1/3 | SYR4 |
| Arsenic | 2.3 µg/L 23% of the EPA limit 10 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019
Highest in the city: 2.58 µg/L — FOOTHILLS MOBILE HOME RANCH · 182 people · 2019 | 2/3 | SYR4 |
| Dalapon | 1.78 µg/L 0.9% of the EPA limit 200 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 1.7 µg/L 5.7% of the EPA limit 30 µg/L Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.675 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2019 | 1/3 | SYR4 |
| PFOS | 0.0263 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2025 | 1/3 | UCMR-5 |
| PFHXS | 0.0247 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2025 | 1/3 | UCMR-5 |
| PFBS | 0.0100 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2025 | 1/3 | UCMR-5 |
| Pfhxa | 0.0074 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2025 | 1/3 | UCMR-5 |
| Thallium, Total | 0.0070 µg/L 0.4% of the EPA limit 2 µg/L Highest in the city: FOOTHILLS MOBILE HOME RANCH · 182 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0066 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2025 | 1/3 | UCMR-5 |
| Pfpea | 0.0064 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2025 | 1/3 | UCMR-5 |
| PFOA | 0.0060 µg/L No EPA limit set Main supplier: CITY OF BOERNE · 24,769 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L Main supplier: CITY OF BOERNE · 24,769 people · 2025 | 3/3 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Boerne
| Supplier | Population served |
|---|---|
| CITY OF BOERNE | 24,769 |
| FOOTHILLS MOBILE HOME RANCH | 182 |
| CARDINAL MOTOR HOME PARK | 57 |
Frequently asked questions about Boerne tap water
Is Boerne tap water safe to drink?
EPA testing detected 35 contaminants in the water serving Boerne. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Boerne?
3 public water suppliers report drinking-water monitoring for Boerne, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Boerne's water?
The contaminants EPA monitoring detected in Boerne include Fluoride, Nitrate, Nitrate-Nitrite, Copper, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.