What was found in Leander'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 |
|---|---|---|---|
| Copper | 689.7500000000001 µg/L 53% of the EPA limit 1300 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2017 | 2/2 | SYR4 |
| Nitrate | 534.5 µg/L 5.3% of the EPA limit 10000 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2019 | 1/2 | SYR4 |
| Nitrate-Nitrite | 300 µg/L 3% of the EPA limit 10000 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2012 | 1/2 | SYR4 |
| Fluoride | 272.5 µg/L 6.8% of the EPA limit 4000 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2019 | 1/2 | SYR4 |
| Cyanide | 147.5 µg/L 74% of the EPA limit 200 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2019 | 1/2 | SYR4 |
| TTHM | 48.724999999999994 µg/L 61% of the EPA limit 80 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2019
Highest in the city: 73.97999999999999 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 2/2 | SYR4 |
| Barium | 68.33 µg/L 3.4% of the EPA limit 2000 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 20.2 µg/L 34% of the EPA limit 60 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2019
Highest in the city: 35.97 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 2/2 | SYR4 |
| Chloroform | 12.879999999999999 µg/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2019
Highest in the city: 27.45 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 14.62 µg/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2019
Highest in the city: 23.339999999999996 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 17.4 µg/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2019
Highest in the city: 19.4 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 10.674999999999999 µg/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2019
Highest in the city: 16.63 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 3.435000000000001 µg/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2019
Highest in the city: 11.73 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 2/2 | SYR4 |
| Lithium | 9.26 µg/L No EPA limit set Highest in the city: BLOCK HOUSE MUD · 6,618 people · 2023 | 1/2 | UCMR-5 |
| Dibromoacetic Acid | 7.0299999999999985 µg/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2019 | 2/2 | SYR4 |
| Bromoform | 6.4275 µg/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2019 | 2/2 | SYR4 |
| Lead | 4.584 µg/L 31% of the EPA limit 15 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2017 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 4.5 pCi/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2018 | 1/2 | SYR4 |
| Monochloroacetic Acid | 4.279999999999999 µg/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2019
Highest in the city: 4.3 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 3.07 µg/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2019 | 2/2 | SYR4 |
| Selenium | 2.48 µg/L 5% of the EPA limit 50 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2019 | 1/2 | SYR4 |
| Arsenic | 1.81 µg/L 18% of the EPA limit 10 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2019 | 1/2 | SYR4 |
| Chromium | 0.7800 µg/L 0.8% of the EPA limit 100 µg/L Main supplier: CITY OF LEANDER · 98,330 people · 2019 | 1/2 | SYR4 |
| Pfba | 0.0051 µg/L No EPA limit set Main supplier: CITY OF LEANDER · 98,330 people · 2025 | 2/2 | UCMR-5 |
| Lead | 0.0011 mg/L 7.3% of the EPA limit 0.0150 mg/L Main supplier: CITY OF LEANDER · 98,330 people · 2026 | 2/2 | 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 Leander
| Supplier | Population served |
|---|---|
| CITY OF LEANDER | 98,330 |
| BLOCK HOUSE MUD | 6,618 |
Frequently asked questions about Leander tap water
Is Leander tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Leander. 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 Leander?
2 public water suppliers report drinking-water monitoring for Leander, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Leander's water?
The contaminants EPA monitoring detected in Leander include Copper, Nitrate, Nitrate-Nitrite, Fluoride, Cyanide. 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.