What was found in ZIP 78537
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 |
|---|---|---|---|
| Copper | 894.8 µg/L 69% of the EPA limit 1300 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2017 | 1/1 | SYR4 |
| Nitrate | 880 µg/L 8.8% of the EPA limit 10000 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Chlorite | 732.2 µg/L 73% of the EPA limit 1000 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Fluoride | 514.5 µg/L 13% of the EPA limit 4000 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Barium | 144.8 µg/L 7.2% of the EPA limit 2000 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Cyanide | 67 µg/L 34% of the EPA limit 200 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| TTHM | 63.63 µg/L 80% of the EPA limit 80 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Lithium | 45.6 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2024 | 1/1 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 31.58 µg/L 53% of the EPA limit 60 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Lead | 25.07 µg/L 167% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2017 | 1/1 | SYR4 |
| Bromoform | 23.68 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 21.04 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 16.98 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 12.55 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 11.99 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 10.22 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Chloroform | 6.5 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 5.5 pCi/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2017 | 1/1 | SYR4 |
| Selenium | 4.02 µg/L 8% of the EPA limit 50 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 3.4 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 3.275 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Atrazine | 0.2400 µg/L 8% of the EPA limit 3 µg/L Main supplier: CITY OF DONNA · 18,720 people · 2019 | 1/1 | SYR4 |
| Pfba | 0.0138 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2024 | 1/1 | UCMR-5 |
| PFOS | 0.0074 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2024 | 1/1 | UCMR-5 |
| Pfhxa | 0.0045 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2024 | 1/1 | UCMR-5 |
| PFHXS | 0.0045 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2024 | 1/1 | UCMR-5 |
| Pfpea | 0.0045 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2024 | 1/1 | UCMR-5 |
| PFBS | 0.0036 µg/L No EPA limit set Main supplier: CITY OF DONNA · 18,720 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0016 mg/L 10% of the EPA limit 0.0150 mg/L Main supplier: CITY OF DONNA · 18,720 people · 2023 | 1/1 | 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 78537
| Supplier | State | Population served |
|---|---|---|
| CITY OF DONNA | TX | 18,720 |
Frequently asked questions about ZIP 78537 tap water
Is the tap water in ZIP 78537 safe to drink?
EPA testing detected 29 contaminants across the water suppliers serving ZIP 78537. 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 78537?
1 public water supplier report EPA drinking-water monitoring for ZIP 78537. Each is listed above with its population served.
What contaminants are in ZIP 78537's water?
EPA monitoring detected Copper, Nitrate, Chlorite, Fluoride, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.