What was found in ZIP 75454
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 | 1330 µg/L 13% of the EPA limit 10000 µg/L Main supplier: CITY OF MELISSA · 26,234 people · 2019 | 1/3 | SYR4 |
| Nitrate-Nitrite | 1264.4 µg/L 13% of the EPA limit 10000 µg/L Main supplier: CITY OF MELISSA · 26,234 people · 2015 | 2/3 | SYR4 |
| Copper | 740.6 µg/L 57% of the EPA limit 1300 µg/L Main supplier: CITY OF MELISSA · 26,234 people · 2018
Highest in the ZIP: 1050 µg/L — NORTH COLLIN SUD · 10,716 people · 2019 | 3/3 | SYR4 |
| Fluoride | 810 µg/L 20% of the EPA limit 4000 µg/L Main supplier: CITY OF MELISSA · 26,234 people · 2019 | 1/3 | SYR4 |
| TTHM | 53.14 µg/L 66% of the EPA limit 80 µg/L Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the ZIP: 122.275 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Chloroform | 16.95 µg/L No EPA limit set Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the ZIP: 94.645 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 30.835 µg/L 51% of the EPA limit 60 µg/L Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the ZIP: 62.71 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Barium | 1.8 µg/L 0.1% of the EPA limit 2000 µg/L Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the ZIP: 50.8 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2013 | 2/3 | SYR4 |
| Trichloroacetic Acid | 6.61 µg/L No EPA limit set Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the ZIP: 36.03 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 18.92 µg/L No EPA limit set Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the ZIP: 30.355 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Lithium | 26.3 µg/L No EPA limit set Highest in the ZIP: NORTH COLLIN SUD · 10,716 people · 2024 | 1/3 | UCMR-5 |
| Bromodichloromethane | 21 µg/L No EPA limit set Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the ZIP: 24.055 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Lead | 10.9 µg/L 73% of the EPA limit 15 µg/L Main supplier: CITY OF MELISSA · 26,234 people · 2018
Highest in the ZIP: 18.392 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 3/3 | SYR4 |
| Dibromochloromethane | 14.3 µg/L No EPA limit set Main supplier: CITY OF MELISSA · 26,234 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 9.06 µg/L No EPA limit set Main supplier: CITY OF MELISSA · 26,234 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 7.3 µg/L No EPA limit set Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the ZIP: 8.368 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Bromoform | 5.353 µg/L No EPA limit set Main supplier: CITY OF MELISSA · 26,234 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 2.68 µg/L No EPA limit set Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the ZIP: 4.06 µg/L — NORTH COLLIN SUD · 10,716 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 2.054 pCi/L No EPA limit set Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.095 pCi/L 22% of the EPA limit 5 pCi/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| 2,4-D | 0.9000 µg/L 1.3% of the EPA limit 70 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| Atrazine | 0.1000 µg/L 3.3% of the EPA limit 3 µg/L Main supplier: CITY OF MELISSA · 26,234 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0080 µg/L No EPA limit set Main supplier: CITY OF MELISSA · 26,234 people · 2024
Highest in the ZIP: 0.0119 µg/L — NORTH COLLIN SUD · 10,716 people · 2025 | 2/3 | UCMR-5 |
| Lead | 0.0014 mg/L 9.5% of the EPA limit 0.0150 mg/L Main supplier: CITY OF MELISSA · 26,234 people · 2024
Highest in the ZIP: 0.0019 mg/L — NORTH COLLIN SUD · 10,716 people · 2025 | 3/3 | 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 75454
| Supplier | State | Population served |
|---|---|---|
| CITY OF MELISSA | TX | 26,234 |
| NORTH COLLIN SUD | TX | 10,716 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
Frequently asked questions about ZIP 75454 tap water
Is the tap water in ZIP 75454 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 75454. 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 75454?
3 public water suppliers report EPA drinking-water monitoring for ZIP 75454. Each is listed above with its population served.
What contaminants are in ZIP 75454's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Copper, Fluoride, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.