What was found in ZIP 36703
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 | 1900 µg/L 19% of the EPA limit 10000 µg/L Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2019 | 4/5 | SYR4 |
| Fluoride | 912 µg/L 23% of the EPA limit 4000 µg/L Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2019 | 1/5 | SYR4 |
| Barium | 479.4 µg/L 24% of the EPA limit 2000 µg/L Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2019 | 4/5 | SYR4 |
| Nitrate-Nitrite | 202.5 µg/L 2% of the EPA limit 10000 µg/L Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2019
Highest in the ZIP: 336 µg/L — SOUTH DALLAS WATER AUTHORITY · 3,504 people · 2019 | 4/5 | SYR4 |
| Copper | 63.14999999999995 µg/L 4.9% of the EPA limit 1300 µg/L Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2019 | 3/5 | SYR4 |
| TTHM | 17.990000000000002 µg/L 22% of the EPA limit 80 µg/L Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2019
Highest in the ZIP: 60.8 µg/L — SOUTH DALLAS WATER AUTHORITY · 3,504 people · 2019 | 5/5 | SYR4 |
| Lead | 22 µg/L 147% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2019 | 1/5 | SYR4 |
| Lithium | 10.3 µg/L No EPA limit set Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2025
Highest in the ZIP: 17.3 µg/L — NORTH DALLAS COUNTY WATER AUTHORITY · 8,838 people · 2025 | 2/5 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 2.612 µg/L 4.4% of the EPA limit 60 µg/L Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2019
Highest in the ZIP: 16.359999999999996 µg/L — DALLAS COUNTY WATER & SEWER AUTHORITY · 4,152 people · 2019 | 5/5 | SYR4 |
| Gross Beta Particle Activity | 10.3 pCi/L No EPA limit set Highest in the ZIP: NORTH DALLAS COUNTY WATER AUTHORITY · 8,838 people · 2016 | 1/5 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.5999999999999996 pCi/L 24% of the EPA limit 15 pCi/L Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2019
Highest in the ZIP: 6.689999999999996 pCi/L — NORTH DALLAS COUNTY WATER AUTHORITY · 8,838 people · 2019 | 5/5 | SYR4 |
| Chloroform | 1.1655 µg/L No EPA limit set Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2018
Highest in the ZIP: 2.8419999999999996 µg/L — DALLAS COUNTY WATER & SEWER AUTHORITY · 4,152 people · 2019 | 3/5 | SYR4 |
| Bromoform | 2.771 µg/L No EPA limit set Highest in the ZIP: SOUTH DALLAS WATER AUTHORITY · 3,504 people · 2017 | 1/5 | SYR4 |
| Bromodichloromethane | 0.6400 µg/L No EPA limit set Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2018
Highest in the ZIP: 2.1229999999999998 µg/L — DALLAS COUNTY WATER & SEWER AUTHORITY · 4,152 people · 2019 | 2/5 | SYR4 |
| Dibromochloromethane | 0.5300 µg/L No EPA limit set Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2018
Highest in the ZIP: 1.7014999999999996 µg/L — DALLAS COUNTY WATER & SEWER AUTHORITY · 4,152 people · 2019 | 3/5 | SYR4 |
| Combined Radium (-226 And -228) | 0.4000 pCi/L 8% of the EPA limit 5 pCi/L Highest in the ZIP: NORTH DALLAS COUNTY WATER AUTHORITY · 8,838 people · 2016 | 1/5 | SYR4 |
| Lead | 0.0017 mg/L 11% of the EPA limit 0.0150 mg/L Main supplier: SELMA, THE WW AND SB OF THE CITY OF · 21,834 people · 2025
Highest in the ZIP: 0.0021 mg/L — SOUTH DALLAS WATER AUTHORITY · 3,504 people · 2023 | 5/5 | 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 36703
| Supplier | State | Population served |
|---|---|---|
| SELMA, THE WW AND SB OF THE CITY OF | AL | 21,834 |
| NORTH DALLAS COUNTY WATER AUTHORITY | AL | 8,838 |
| WEST AUTAUGA WATER AUTHORITY | AL | 5,106 |
| DALLAS COUNTY WATER & SEWER AUTHORITY | AL | 4,152 |
| SOUTH DALLAS WATER AUTHORITY | AL | 3,504 |
Frequently asked questions about ZIP 36703 tap water
Is the tap water in ZIP 36703 safe to drink?
EPA testing detected 17 contaminants across the water suppliers serving ZIP 36703. 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 36703?
5 public water suppliers report EPA drinking-water monitoring for ZIP 36703. Each is listed above with its population served.
What contaminants are in ZIP 36703's water?
EPA monitoring detected Nitrate, Fluoride, Barium, Nitrate-Nitrite, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.