What was found in ZIP 75077
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 | 2032 µg/L 20% of the EPA limit 10000 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 3/4 | SYR4 |
| Nitrate-Nitrite | 2012 µg/L 20% of the EPA limit 10000 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2015 | 4/4 | SYR4 |
| Fluoride | 673 µg/L 17% of the EPA limit 4000 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 1505 µg/L — CROSS TIMBERS WSC · 8,751 people · 2019 | 3/4 | SYR4 |
| Copper | 571.5 µg/L 44% of the EPA limit 1300 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 650 µg/L — CITY OF HIGHLAND VILLAGE · 16,500 people · 2019 | 4/4 | SYR4 |
| Nitrite | 210 µg/L 21% of the EPA limit 1000 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2015
Highest in the ZIP: 418.8 µg/L — CROSS TIMBERS WSC · 8,751 people · 2016 | 2/4 | SYR4 |
| Cyanide | 128.32 µg/L 64% of the EPA limit 200 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 143.5 µg/L — CROSS TIMBERS WSC · 8,751 people · 2019 | 3/4 | SYR4 |
| TTHM | 28.81 µg/L 36% of the EPA limit 80 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 122.275 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Chloroform | 16.66 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 94.645 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Barium | 41.75 µg/L 2.1% of the EPA limit 2000 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 68.6 µg/L — CITY OF HIGHLAND VILLAGE · 16,500 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 28.065 µg/L 47% of the EPA limit 60 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 62.71 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Lithium | 46.9 µg/L No EPA limit set Highest in the ZIP: CROSS TIMBERS WSC · 8,751 people · 2024 | 2/4 | UCMR-5 |
| Trichloroacetic Acid | 5.6 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 36.03 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 18.66 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 30.355 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 8.3 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 24.055 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Lead | 4.36 µg/L 29% of the EPA limit 15 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 18.392 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 4/4 | SYR4 |
| Bromoform | 11.6575 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 4/4 | SYR4 |
| Xylenes, Total | 10.6 µg/L 0.1% of the EPA limit 10000 µg/L Highest in the ZIP: CITY OF HIGHLAND VILLAGE · 16,500 people · 2019 | 2/4 | SYR4 |
| Dibromochloromethane | 4.2835 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 8.8385 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 5.33 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 8.368 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 6.81 µg/L 114% of the EPA limit, at the 95th percentile of samples — 6 µg/L Highest in the ZIP: CITY OF HIGHLAND VILLAGE · 16,500 people · 2019 | 1/4 | SYR4 |
| Chromium | 2.668 µg/L 2.7% of the EPA limit 100 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 5.9225 µg/L — CROSS TIMBERS WSC · 8,751 people · 2019 | 3/4 | SYR4 |
| Gross Beta Particle Activity | 4.795 pCi/L No EPA limit set Highest in the ZIP: CITY OF HIGHLAND VILLAGE · 16,500 people · 2017 | 3/4 | SYR4 |
| Arsenic | 3.902 µg/L 39% of the EPA limit 10 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 1/4 | SYR4 |
| Monobromoacetic Acid | 3.72 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 4/4 | SYR4 |
| Dibromoacetic Acid | 2.215 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 3.53 µg/L — CITY OF HIGHLAND VILLAGE · 16,500 people · 2019 | 4/4 | SYR4 |
| Selenium | 2.341 µg/L 4.7% of the EPA limit 50 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/4 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2017
Highest in the ZIP: 1.925 pCi/L — CROSS TIMBERS WSC · 8,751 people · 2016 | 3/4 | SYR4 |
| Ethylbenzene | 1.14 µg/L 0.2% of the EPA limit 700 µg/L Highest in the ZIP: CITY OF HIGHLAND VILLAGE · 16,500 people · 2019 | 1/4 | 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 | 1/4 | SYR4 |
| 6:2 Fts | 0.4410 µg/L No EPA limit set Highest in the ZIP: CROSS TIMBERS WSC · 8,751 people · 2024 | 1/4 | UCMR-5 |
| Atrazine | 0.3770 µg/L 13% of the EPA limit 3 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 3/4 | SYR4 |
| Simazine | 0.3360 µg/L 8.4% of the EPA limit 4 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 3/4 | SYR4 |
| Antimony, Total | 0.2485 µg/L 4.1% of the EPA limit 6 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/4 | SYR4 |
| Thallium, Total | 0.0140 µg/L 0.7% of the EPA limit 2 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the ZIP: 0.2250 µg/L — CROSS TIMBERS WSC · 8,751 people · 2019 | 2/4 | SYR4 |
| Pfba | 0.0078 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2025
Highest in the ZIP: 0.0093 µg/L — CITY OF HIGHLAND VILLAGE · 16,500 people · 2024 | 3/4 | UCMR-5 |
| PFHXS | 0.0088 µg/L No EPA limit set Highest in the ZIP: CROSS TIMBERS WSC · 8,751 people · 2024 | 1/4 | UCMR-5 |
| Pfhxa | 0.0046 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2025
Highest in the ZIP: 0.0078 µg/L — CITY OF HIGHLAND VILLAGE · 16,500 people · 2024 | 3/4 | UCMR-5 |
| Pfpea | 0.0045 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2025
Highest in the ZIP: 0.0067 µg/L — CITY OF HIGHLAND VILLAGE · 16,500 people · 2024 | 3/4 | UCMR-5 |
| PFBS | 0.0032 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2025
Highest in the ZIP: 0.0049 µg/L — CITY OF HIGHLAND VILLAGE · 16,500 people · 2024 | 3/4 | UCMR-5 |
| Pfhpa | 0.0030 µg/L No EPA limit set Highest in the ZIP: CITY OF HIGHLAND VILLAGE · 16,500 people · 2024 | 1/4 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2025
Highest in the ZIP: 0.0026 mg/L — CITY OF HIGHLAND VILLAGE · 16,500 people · 2024 | 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 75077
| Supplier | State | Population served |
|---|---|---|
| CITY OF LEWISVILLE | TX | 140,880 |
| CITY OF HIGHLAND VILLAGE | TX | 16,500 |
| CROSS TIMBERS WSC | TX | 8,751 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
Frequently asked questions about ZIP 75077 tap water
Is the tap water in ZIP 75077 safe to drink?
EPA testing detected 41 contaminants across the water suppliers serving ZIP 75077. 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 75077?
4 public water suppliers report EPA drinking-water monitoring for ZIP 75077. Each is listed above with its population served.
What contaminants are in ZIP 75077's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Nitrite, and others across this ZIP's suppliers. The full list with levels and sources is above.