What was found in ZIP 78640
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 |
|---|---|---|---|
| Fluoride | 2928 µg/L 73% of the EPA limit 4000 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 3115 µg/L — COUNTY LINE SUD · 19,609 people · 2017 | 4/4 | SYR4 |
| Nitrate | 1830 µg/L 18% of the EPA limit 10000 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 2040 µg/L — GOFORTH SUD · 34,893 people · 2019 | 4/4 | SYR4 |
| Nitrate-Nitrite | 1321.9999999999993 µg/L 13% of the EPA limit 10000 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 1918 µg/L — GOFORTH SUD · 34,893 people · 2015 | 3/4 | SYR4 |
| Copper | 151.90000000000003 µg/L 12% of the EPA limit 1300 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 1400 µg/L — COUNTY LINE SUD · 19,609 people · 2019 | 4/4 | SYR4 |
| Barium | 191.6 µg/L 9.6% of the EPA limit 2000 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019 | 4/4 | SYR4 |
| TTHM | 79.11999999999995 µg/L 99% of the EPA limit 80 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019 | 4/4 | SYR4 |
| Nitrite | 74.8 µg/L 7.5% of the EPA limit 1000 µg/L Highest in the ZIP: GOFORTH SUD · 34,893 people · 2015 | 1/4 | SYR4 |
| Cyanide | 49 µg/L 25% of the EPA limit 200 µg/L Highest in the ZIP: GOFORTH SUD · 34,893 people · 2017 | 2/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 30.09999999999999 µg/L 50% of the EPA limit 60 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 30.834999999999987 µg/L — COUNTY LINE SUD · 19,609 people · 2019 | 4/4 | SYR4 |
| Chloroform | 25.709999999999987 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 27.439999999999998 µg/L — GOFORTH SUD · 34,893 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 24.234999999999996 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 23.444999999999997 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2019 | 4/4 | SYR4 |
| Xylenes, Total | 19.75 µg/L 0.2% of the EPA limit 10000 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019 | 2/4 | SYR4 |
| Lithium | 12.6 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2024
Highest in the ZIP: 19.1 µg/L — PLUM CREEK · 7,065 people · 2025 | 4/4 | UCMR-5 |
| Trichloroacetic Acid | 9.609999999999996 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 14.100000000000001 µg/L — GOFORTH SUD · 34,893 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 13.419999999999998 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2019 | 4/4 | SYR4 |
| Lead | 11.9 µg/L 79% of the EPA limit 15 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019 | 4/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 10.78 pCi/L 72% of the EPA limit 15 pCi/L Main supplier: CITY OF KYLE · 52,000 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 4.85 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 10.379999999999999 µg/L — COUNTY LINE SUD · 19,609 people · 2019 | 4/4 | SYR4 |
| Bromoform | 8.084999999999999 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2019 | 4/4 | SYR4 |
| Dibromoacetic Acid | 6.784999999999999 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 7.599999999999998 µg/L — COUNTY LINE SUD · 19,609 people · 2019 | 4/4 | SYR4 |
| Gross Beta Particle Activity | 5.6 pCi/L No EPA limit set Highest in the ZIP: COUNTY LINE SUD · 19,609 people · 2018 | 2/4 | SYR4 |
| Chromium | 2.13 µg/L 2.1% of the EPA limit 100 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 4.96 µg/L — PLUM CREEK · 7,065 people · 2019 | 2/4 | SYR4 |
| Ethylbenzene | 3.999999999999999 µg/L 0.6% of the EPA limit 700 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 1.5305 pCi/L 31% of the EPA limit 5 pCi/L Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 2.33 pCi/L — PLUM CREEK · 7,065 people · 2019 | 4/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.9 µg/L 32% of the EPA limit 6 µg/L Highest in the ZIP: GOFORTH SUD · 34,893 people · 2019 | 2/4 | SYR4 |
| Monobromoacetic Acid | 1.5 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 1.58 µg/L — COUNTY LINE SUD · 19,609 people · 2019 | 4/4 | SYR4 |
| Dalapon | 1.4 µg/L 0.7% of the EPA limit 200 µg/L Highest in the ZIP: PLUM CREEK · 7,065 people · 2019 | 2/4 | SYR4 |
| Selenium | 1.16 µg/L 2.3% of the EPA limit 50 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019
Highest in the ZIP: 1.37 µg/L — PLUM CREEK · 7,065 people · 2019 | 2/4 | SYR4 |
| Arsenic | 1.11 µg/L 11% of the EPA limit 10 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019 | 1/4 | SYR4 |
| Thallium, Total | 0.3510 µg/L 18% of the EPA limit 2 µg/L Main supplier: CITY OF KYLE · 52,000 people · 2019 | 1/4 | SYR4 |
| Atrazine | 0.3200 µg/L 11% of the EPA limit 3 µg/L Highest in the ZIP: PLUM CREEK · 7,065 people · 2019 | 1/4 | SYR4 |
| Pfba | 0.0194 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2024 | 2/4 | UCMR-5 |
| 6:2 Fts | 0.0156 µg/L No EPA limit set Highest in the ZIP: GOFORTH SUD · 34,893 people · 2024 | 1/4 | UCMR-5 |
| PFBS | 0.0072 µg/L No EPA limit set Highest in the ZIP: GOFORTH SUD · 34,893 people · 2024 | 1/4 | UCMR-5 |
| Pfpea | 0.0045 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2024
Highest in the ZIP: 0.0051 µg/L — GOFORTH SUD · 34,893 people · 2024 | 3/4 | UCMR-5 |
| Pfhxa | 0.0031 µg/L No EPA limit set Main supplier: CITY OF KYLE · 52,000 people · 2024
Highest in the ZIP: 0.0041 µg/L — GOFORTH SUD · 34,893 people · 2024 | 2/4 | UCMR-5 |
| Lead | 0.0019 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: CITY OF KYLE · 52,000 people · 2025 | 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 78640
| Supplier | State | Population served |
|---|---|---|
| CITY OF KYLE | TX | 52,000 |
| GOFORTH SUD | TX | 34,893 |
| COUNTY LINE SUD | TX | 19,609 |
| PLUM CREEK | TX | 7,065 |
Frequently asked questions about ZIP 78640 tap water
Is the tap water in ZIP 78640 safe to drink?
EPA testing detected 38 contaminants across the water suppliers serving ZIP 78640. 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 78640?
4 public water suppliers report EPA drinking-water monitoring for ZIP 78640. Each is listed above with its population served.
What contaminants are in ZIP 78640's water?
EPA monitoring detected Fluoride, Nitrate, Nitrate-Nitrite, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.