What was found in ZIP 78539
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 | 712.5 µg/L 18% of the EPA limit 4000 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Chlorite | 710 µg/L 71% of the EPA limit 1000 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Nitrate | 482.4999999999999 µg/L 4.8% of the EPA limit 10000 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Copper | 264.5049999999999 µg/L 20% of the EPA limit 1300 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Cyanide | 180 µg/L 90% of the EPA limit 200 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Barium | 127.75 µg/L 6.4% of the EPA limit 2000 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| TTHM | 83.65 µg/L 105% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Bromoform | 45.37999999999998 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Lithium | 37.8 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2023
Highest in the ZIP: 41.3 µg/L — SHARYLAND WSC · 68,562 people · 2025 | 2/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 34.25 µg/L 57% of the EPA limit 60 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 26.45999999999998 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 23.049999999999997 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 5.949999999999999 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2019
Highest in the ZIP: 13.779999999999983 µg/L — SHARYLAND WSC · 68,562 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 10.79 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 8.875 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 5.9399999999999995 pCi/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2017
Highest in the ZIP: 7.899999999999999 pCi/L — SHARYLAND WSC · 68,562 people · 2019 | 2/2 | SYR4 |
| Lead | 7.773500000000001 µg/L 52% of the EPA limit 15 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 6.6 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2019
Highest in the ZIP: 6.689999999999998 µg/L — SHARYLAND WSC · 68,562 people · 2019 | 2/2 | SYR4 |
| Selenium | 4.9 µg/L 9.8% of the EPA limit 50 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019
Highest in the ZIP: 5.9399999999999995 µg/L — SHARYLAND WSC · 68,562 people · 2019 | 2/2 | SYR4 |
| Chloroform | 3 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2019
Highest in the ZIP: 4.019999999999999 µg/L — SHARYLAND WSC · 68,562 people · 2019 | 2/2 | SYR4 |
| Combined Uranium | 3.41 µg/L 11% of the EPA limit 30 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2017 | 2/2 | SYR4 |
| Arsenic | 2.8 µg/L 28% of the EPA limit 10 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019
Highest in the ZIP: 3.07 µg/L — SHARYLAND WSC · 68,562 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 2.2 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2019
Highest in the ZIP: 2.5 µg/L — SHARYLAND WSC · 68,562 people · 2019 | 2/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2.2 µg/L 37% of the EPA limit 6 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1 pCi/L 6.7% of the EPA limit 15 pCi/L Main supplier: CITY OF EDINBURG · 85,224 people · 2017
Highest in the ZIP: 1.95 pCi/L — SHARYLAND WSC · 68,562 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: CITY OF EDINBURG · 85,224 people · 2016 | 1/2 | SYR4 |
| Antimony, Total | 0.5310 µg/L 8.9% of the EPA limit 6 µg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2019 | 1/2 | SYR4 |
| Pfhxa | 0.0125 µg/L No EPA limit set Highest in the ZIP: SHARYLAND WSC · 68,562 people · 2025 | 1/2 | UCMR-5 |
| Pfpea | 0.0123 µg/L No EPA limit set Highest in the ZIP: SHARYLAND WSC · 68,562 people · 2025 | 1/2 | UCMR-5 |
| Pfba | 0.0060 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2024
Highest in the ZIP: 0.0117 µg/L — SHARYLAND WSC · 68,562 people · 2025 | 2/2 | UCMR-5 |
| PFOS | 0.0045 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2024
Highest in the ZIP: 0.0068 µg/L — SHARYLAND WSC · 68,562 people · 2025 | 2/2 | UCMR-5 |
| PFHXS | 0.0064 µg/L No EPA limit set Highest in the ZIP: SHARYLAND WSC · 68,562 people · 2025 | 1/2 | UCMR-5 |
| Pfhpa | 0.0045 µg/L No EPA limit set Highest in the ZIP: SHARYLAND WSC · 68,562 people · 2025 | 1/2 | UCMR-5 |
| PFOA | 0.0043 µg/L No EPA limit set Highest in the ZIP: SHARYLAND WSC · 68,562 people · 2025 | 1/2 | UCMR-5 |
| PFBS | 0.0034 µg/L No EPA limit set Main supplier: CITY OF EDINBURG · 85,224 people · 2024 | 2/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF EDINBURG · 85,224 people · 2025
Highest in the ZIP: 0.0010 mg/L — SHARYLAND WSC · 68,562 people · 2024 | 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.
Water suppliers serving ZIP 78539
| Supplier | State | Population served |
|---|---|---|
| CITY OF EDINBURG | TX | 85,224 |
| SHARYLAND WSC | TX | 68,562 |
Frequently asked questions about ZIP 78539 tap water
Is the tap water in ZIP 78539 safe to drink?
EPA testing detected 36 contaminants across the water suppliers serving ZIP 78539. 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 78539?
2 public water suppliers report EPA drinking-water monitoring for ZIP 78539. Each is listed above with its population served.
What contaminants are in ZIP 78539's water?
EPA monitoring detected Fluoride, Chlorite, Nitrate, Copper, Cyanide, and others across this ZIP's suppliers. The full list with levels and sources is above.