What was found in Hillsboro'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 |
|---|---|---|---|
| Nitrate | 2230 µg/L 22% of the EPA limit 10000 µg/L Highest in the city: AQUILLA WSD · 0 people · 2019 | 4/5 | SYR4 |
| Fluoride | 1915 µg/L 48% of the EPA limit 4000 µg/L Highest in the city: BRANDON-IRENE WSC · 2,000 people · 2018 | 4/5 | SYR4 |
| Nitrate-Nitrite | 770 µg/L 7.7% of the EPA limit 10000 µg/L Highest in the city: BRANDON-IRENE WSC · 2,000 people · 2019 | 3/5 | SYR4 |
| Chlorite | 740 µg/L 74% of the EPA limit 1000 µg/L Highest in the city: AQUILLA WSD · 0 people · 2019 | 1/5 | SYR4 |
| Copper | 234.45 µg/L 18% of the EPA limit 1300 µg/L Main supplier: CITY OF HILLSBORO · 8,867 people · 2019 | 5/5 | SYR4 |
| Cyanide | 123 µg/L 62% of the EPA limit 200 µg/L Highest in the city: AQUILLA WSD · 0 people · 2019 | 2/5 | SYR4 |
| Barium | 86.76 µg/L 4.3% of the EPA limit 2000 µg/L Highest in the city: BRANDON-IRENE WSC · 2,000 people · 2019 | 4/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 36.84 µg/L 61% of the EPA limit 60 µg/L Main supplier: CITY OF HILLSBORO · 8,867 people · 2019 | 5/5 | SYR4 |
| Bromoform | 1.03 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2019
Highest in the city: 28.995 µg/L — BRANDON-IRENE WSC · 2,000 people · 2019 | 5/5 | SYR4 |
| TTHM | 17.85 µg/L 22% of the EPA limit 80 µg/L Main supplier: CITY OF HILLSBORO · 8,867 people · 2019
Highest in the city: 27.97 µg/L — BRANDON-IRENE WSC · 2,000 people · 2019 | 5/5 | SYR4 |
| Dichloroacetic Acid | 25.02 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2019 | 3/5 | SYR4 |
| Lead | 20.375 µg/L 136% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CITY OF HILLSBORO · 8,867 people · 2019 | 5/5 | SYR4 |
| Chloroform | 11.95 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2019 | 4/5 | SYR4 |
| Nitrite | 10 µg/L 1% of the EPA limit 1000 µg/L Highest in the city: BRANDON-IRENE WSC · 2,000 people · 2019 | 1/5 | SYR4 |
| Monochloroacetic Acid | 7.82 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2019 | 4/5 | SYR4 |
| Bromodichloromethane | 5.625 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2019
Highest in the city: 5.7795 µg/L — AQUILLA WSD · 0 people · 2019 | 5/5 | SYR4 |
| Dibromoacetic Acid | 3.67 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2019
Highest in the city: 5.4 µg/L — BRANDON-IRENE WSC · 2,000 people · 2019 | 5/5 | SYR4 |
| Trichloroacetic Acid | 5.3 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2019 | 3/5 | SYR4 |
| Arsenic | 4.98 µg/L 50% of the EPA limit 10 µg/L Highest in the city: BRANDON-IRENE WSC · 2,000 people · 2019 | 2/5 | SYR4 |
| Dibromochloromethane | 2.3 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2019
Highest in the city: 4.585 µg/L — CITY OF CARLS CORNER · 130 people · 2019 | 5/5 | SYR4 |
| Chromium | 4 µg/L 4% of the EPA limit 100 µg/L Highest in the city: CITY OF CARLS CORNER · 130 people · 2019 | 4/5 | SYR4 |
| Selenium | 3.5 µg/L 7% of the EPA limit 50 µg/L Highest in the city: BRANDON-IRENE WSC · 2,000 people · 2019 | 2/5 | SYR4 |
| Xylenes, Total | 3.342 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: AQUILLA WSD · 0 people · 2019 | 2/5 | SYR4 |
| Monobromoacetic Acid | 2.8 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2019 | 3/5 | SYR4 |
| Atrazine | 2.525 µg/L 84% of the EPA limit 3 µg/L Highest in the city: AQUILLA WSD · 0 people · 2019 | 1/5 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.937 µg/L 32% of the EPA limit 6 µg/L Highest in the city: BRANDON-IRENE WSC · 2,000 people · 2019 | 2/5 | SYR4 |
| Toluene | 1.9 µg/L 0.2% of the EPA limit 1000 µg/L Highest in the city: BRANDON-IRENE WSC · 2,000 people · 2019 | 1/5 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Highest in the city: BRANDON-IRENE WSC · 2,000 people · 2018 | 3/5 | SYR4 |
| Ethylbenzene | 0.8375 µg/L 0.1% of the EPA limit 700 µg/L Highest in the city: AQUILLA WSD · 0 people · 2019 | 1/5 | SYR4 |
| Antimony, Total | 0.2880 µg/L 4.8% of the EPA limit 6 µg/L Highest in the city: AQUILLA WSD · 0 people · 2019 | 1/5 | SYR4 |
| Pfpea | 0.0129 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2023 | 1/5 | UCMR-5 |
| Pfhxa | 0.0107 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2023 | 1/5 | UCMR-5 |
| Pfba | 0.0091 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2023 | 1/5 | UCMR-5 |
| 6:2 Fts | 0.0057 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2023 | 1/5 | UCMR-5 |
| PFBS | 0.0054 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2023 | 1/5 | UCMR-5 |
| Lead | 0.0050 mg/L 33% of the EPA limit 0.0150 mg/L Main supplier: CITY OF HILLSBORO · 8,867 people · 2023 | 4/5 | LCR |
| PFOA | 0.0045 µg/L No EPA limit set Main supplier: CITY OF HILLSBORO · 8,867 people · 2023 | 1/5 | UCMR-5 |
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 Hillsboro
| Supplier | Population served |
|---|---|
| CITY OF HILLSBORO | 8,867 |
| BRANDON-IRENE WSC | 2,000 |
| CITY OF CARLS CORNER | 130 |
| TRES VIDAS SUBDIVISION | 90 |
| AQUILLA WSD | 0 |
Frequently asked questions about Hillsboro tap water
Is Hillsboro tap water safe to drink?
EPA testing detected 37 contaminants in the water serving Hillsboro. 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 Hillsboro?
5 public water suppliers report drinking-water monitoring for Hillsboro, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Hillsboro's water?
The contaminants EPA monitoring detected in Hillsboro include Nitrate, Fluoride, Nitrate-Nitrite, Chlorite, Copper. 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.