What was found in ZIP 78374
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 | 325 µg/L 25% of the EPA limit 1300 µg/L Main supplier: CITY OF PORTLAND · 22,933 people · 2019
Highest in the ZIP: 362 µg/L — RINCON WSC · 5,034 people · 2019 | 2/2 | SYR4 |
| TTHM | 59.15 µg/L 74% of the EPA limit 80 µg/L Main supplier: CITY OF PORTLAND · 22,933 people · 2019
Highest in the ZIP: 62.595 µg/L — RINCON WSC · 5,034 people · 2019 | 2/2 | SYR4 |
| Lithium | 38.3 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2024 | 2/2 | UCMR-5 |
| Bromoform | 31.24 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2019
Highest in the ZIP: 34.9 µg/L — RINCON WSC · 5,034 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 33.5 µg/L 56% of the EPA limit 60 µg/L Main supplier: CITY OF PORTLAND · 22,933 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 22.35 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 18.55 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2019
Highest in the ZIP: 21.085 µg/L — RINCON WSC · 5,034 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 20.15 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 12.8 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2019
Highest in the ZIP: 14.47 µg/L — RINCON WSC · 5,034 people · 2019 | 2/2 | SYR4 |
| Lead | 14 µg/L 93% of the EPA limit 15 µg/L Main supplier: CITY OF PORTLAND · 22,933 people · 2019 | 2/2 | SYR4 |
| Chloroform | 10.2 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2019
Highest in the ZIP: 10.27 µg/L — RINCON WSC · 5,034 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 9.66 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 6.435 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 3.425 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2019 | 2/2 | SYR4 |
| Pfba | 0.0097 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2024
Highest in the ZIP: 0.0130 µg/L — RINCON WSC · 5,034 people · 2024 | 2/2 | UCMR-5 |
| Pfpea | 0.0051 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2024 | 2/2 | UCMR-5 |
| Pfhxa | 0.0040 µg/L No EPA limit set Main supplier: CITY OF PORTLAND · 22,933 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.0015 mg/L 9.9% of the EPA limit 0.0150 mg/L Main supplier: CITY OF PORTLAND · 22,933 people · 2025
Highest in the ZIP: 0.0015 mg/L — RINCON WSC · 5,034 people · 2025 | 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 78374
| Supplier | State | Population served |
|---|---|---|
| CITY OF PORTLAND | TX | 22,933 |
| RINCON WSC | TX | 5,034 |
Frequently asked questions about ZIP 78374 tap water
Is the tap water in ZIP 78374 safe to drink?
EPA testing detected 18 contaminants across the water suppliers serving ZIP 78374. 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 78374?
2 public water suppliers report EPA drinking-water monitoring for ZIP 78374. Each is listed above with its population served.
What contaminants are in ZIP 78374's water?
EPA monitoring detected Copper, TTHM, Lithium, Bromoform, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.