What was found in ZIP 78641
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 3682.4999999999995 µg/L 37% of the EPA limit 10000 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 3/4 | SYR4 |
| Fluoride | 679.9999999999991 µg/L 17% of the EPA limit 4000 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 920.9999999999999 µg/L — SANDY CREEK RANCHES SUBDIVISION · 2,022 people · 2018 | 3/4 | SYR4 |
| Copper | 350.8000000000002 µg/L 27% of the EPA limit 1300 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2017
Highest in the ZIP: 689.7500000000001 µg/L — CITY OF LEANDER · 98,330 people · 2017 | 4/4 | SYR4 |
| Nitrate-Nitrite | 300 µg/L 3% of the EPA limit 10000 µg/L Highest in the ZIP: CITY OF LEANDER · 98,330 people · 2012 | 2/4 | SYR4 |
| Cyanide | 170 µg/L 85% of the EPA limit 200 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 2/4 | SYR4 |
| Barium | 54.239999999999995 µg/L 2.7% of the EPA limit 2000 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 74.755 µg/L — SANDY CREEK RANCHES SUBDIVISION · 2,022 people · 2018 | 3/4 | SYR4 |
| TTHM | 53.35 µg/L 67% of the EPA limit 80 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 73.97999999999999 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 4/4 | SYR4 |
| Lithium | 17.4 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2024
Highest in the ZIP: 62 µg/L — SANDY CREEK RANCHES SUBDIVISION · 2,022 people · 2025 | 3/4 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 27.089999999999996 µg/L 45% of the EPA limit 60 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 35.97 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 4/4 | SYR4 |
| Chloroform | 24.819999999999993 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 27.45 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 18.359999999999978 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 23.339999999999996 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 14.134999999999996 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 19.4 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 16.595 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 16.63 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 3/4 | SYR4 |
| Gross Beta Particle Activity | 15.45 pCi/L No EPA limit set Highest in the ZIP: SANDY CREEK RANCHES SUBDIVISION · 2,022 people · 2018 | 2/4 | SYR4 |
| Lead | 12.404999999999976 µg/L 83% of the EPA limit 15 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2017 | 4/4 | SYR4 |
| Trichloroacetic Acid | 9.475 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 11.73 µg/L — BLOCK HOUSE MUD · 6,618 people · 2019 | 3/4 | SYR4 |
| Bromoform | 9.689999999999998 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 4/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 8.399999999999999 pCi/L 56% of the EPA limit 15 pCi/L Highest in the ZIP: SANDY CREEK RANCHES SUBDIVISION · 2,022 people · 2018 | 1/4 | SYR4 |
| Dibromoacetic Acid | 6.089999999999997 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 7.0299999999999985 µg/L — CITY OF LEANDER · 98,330 people · 2019 | 4/4 | SYR4 |
| Selenium | 2.338 µg/L 4.7% of the EPA limit 50 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 6.38 µg/L — SANDY CREEK RANCHES SUBDIVISION · 2,022 people · 2018 | 3/4 | SYR4 |
| Monochloroacetic Acid | 5.32 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 3/4 | SYR4 |
| Monobromoacetic Acid | 3.95 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 4/4 | SYR4 |
| Combined Radium (-226 And -228) | 3.6749999999999994 pCi/L 73% of the EPA limit 5 pCi/L Highest in the ZIP: SANDY CREEK RANCHES SUBDIVISION · 2,022 people · 2018 | 1/4 | SYR4 |
| Chromium | 3.63535 µg/L 3.6% of the EPA limit 100 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 2/4 | SYR4 |
| Arsenic | 1.3332000000000002 µg/L 13% of the EPA limit 10 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019
Highest in the ZIP: 1.81 µg/L — CITY OF LEANDER · 98,330 people · 2019 | 2/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.557 µg/L 26% of the EPA limit 6 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 1/4 | SYR4 |
| Combined Uranium | 1.1949999999999998 µg/L 4% of the EPA limit 30 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2018
Highest in the ZIP: 1.5 µg/L — SANDY CREEK RANCHES SUBDIVISION · 2,022 people · 2018 | 2/4 | SYR4 |
| Antimony, Total | 0.2830 µg/L 4.7% of the EPA limit 6 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 1/4 | SYR4 |
| Thallium, Total | 0.2450 µg/L 12% of the EPA limit 2 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 1/4 | SYR4 |
| 2,4-D | 0.2000 µg/L 0.3% of the EPA limit 70 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 1/4 | SYR4 |
| Atrazine | 0.1700 µg/L 5.7% of the EPA limit 3 µg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2019 | 1/4 | SYR4 |
| Pfba | 0.0338 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2024 | 3/4 | UCMR-5 |
| Pfpea | 0.0187 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2024 | 1/4 | UCMR-5 |
| Pfhxa | 0.0101 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2024 | 1/4 | UCMR-5 |
| PFBS | 0.0096 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2024 | 1/4 | UCMR-5 |
| PFOS | 0.0057 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2024 | 1/4 | UCMR-5 |
| PFOA | 0.0049 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2024 | 1/4 | UCMR-5 |
| PFHXS | 0.0047 µg/L No EPA limit set Main supplier: CITY OF GEORGETOWN · 191,639 people · 2024 | 1/4 | UCMR-5 |
| Lead | 0.0022 mg/L 15% of the EPA limit 0.0150 mg/L Main supplier: CITY OF GEORGETOWN · 191,639 people · 2023 | 4/4 | 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.
Water suppliers serving ZIP 78641
| Supplier | State | Population served |
|---|---|---|
| CITY OF GEORGETOWN | TX | 191,639 |
| CITY OF LEANDER | TX | 98,330 |
| BLOCK HOUSE MUD | TX | 6,618 |
| SANDY CREEK RANCHES SUBDIVISION | TX | 2,022 |
Frequently asked questions about ZIP 78641 tap water
Is the tap water in ZIP 78641 safe to drink?
EPA testing detected 39 contaminants across the water suppliers serving ZIP 78641. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 78641?
4 public water suppliers report EPA drinking-water monitoring for ZIP 78641. Each is listed above with its population served.
What contaminants are in ZIP 78641's water?
EPA monitoring detected Nitrate, Fluoride, Copper, Nitrate-Nitrite, Cyanide, and others across this ZIP's suppliers. The full list with levels and sources is above.