What was found in ZIP 75071
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 | 756.05 µg/L 58% of the EPA limit 1300 µg/L Main supplier: CITY OF MCKINNEY · 224,043 people · 2018
Highest in the ZIP: 1050 µg/L — NORTH COLLIN SUD · 10,716 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 140 µg/L 1.4% of the EPA limit 10000 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| TTHM | 60.995 µg/L 76% of the EPA limit 80 µg/L Main supplier: CITY OF MCKINNEY · 224,043 people · 2019
Highest in the ZIP: 122.275 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Chloroform | 18.355 µg/L No EPA limit set Main supplier: CITY OF MCKINNEY · 224,043 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) | 33.51 µg/L 56% of the EPA limit 60 µg/L Main supplier: CITY OF MCKINNEY · 224,043 people · 2019
Highest in the ZIP: 62.71 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Barium | 50.8 µg/L 2.5% of the EPA limit 2000 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2013 | 1/3 | SYR4 |
| Trichloroacetic Acid | 5.7 µg/L No EPA limit set Main supplier: CITY OF MCKINNEY · 224,043 people · 2019
Highest in the ZIP: 36.03 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 22.055 µg/L No EPA limit set Main supplier: CITY OF MCKINNEY · 224,043 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 | 24.155 µg/L No EPA limit set Main supplier: CITY OF MCKINNEY · 224,043 people · 2019 | 3/3 | SYR4 |
| Lead | 4.175 µg/L 28% of the EPA limit 15 µg/L Main supplier: CITY OF MCKINNEY · 224,043 people · 2018
Highest in the ZIP: 18.392 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 3/3 | SYR4 |
| Dibromochloromethane | 16.11 µg/L No EPA limit set Main supplier: CITY OF MCKINNEY · 224,043 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 11.995 µg/L No EPA limit set Main supplier: CITY OF MCKINNEY · 224,043 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 4.55 µg/L No EPA limit set Main supplier: CITY OF MCKINNEY · 224,043 people · 2019
Highest in the ZIP: 8.368 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Bromoform | 5.5545 µg/L No EPA limit set Main supplier: CITY OF MCKINNEY · 224,043 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 4.95 µg/L No EPA limit set Main supplier: CITY OF MCKINNEY · 224,043 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 |
| Pfba | 0.0087 µg/L No EPA limit set Main supplier: CITY OF MCKINNEY · 224,043 people · 2025
Highest in the ZIP: 0.0119 µg/L — NORTH COLLIN SUD · 10,716 people · 2025 | 2/3 | UCMR-5 |
| Lead | 0.00090 mg/L 6% of the EPA limit 0.0150 mg/L Main supplier: CITY OF MCKINNEY · 224,043 people · 2025
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 75071
| Supplier | State | Population served |
|---|---|---|
| CITY OF MCKINNEY | TX | 224,043 |
| NORTH COLLIN SUD | TX | 10,716 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
Frequently asked questions about ZIP 75071 tap water
Is the tap water in ZIP 75071 safe to drink?
EPA testing detected 21 contaminants across the water suppliers serving ZIP 75071. 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 75071?
3 public water suppliers report EPA drinking-water monitoring for ZIP 75071. Each is listed above with its population served.
What contaminants are in ZIP 75071's water?
EPA monitoring detected Copper, Nitrate-Nitrite, TTHM, Chloroform, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.