What was found in ZIP 78113
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 | 50 µg/L 0.5% of the EPA limit 10000 µg/L Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 3314.999999999998 µg/L — EL OSO WSC · 6,288 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 40 µg/L 0.4% of the EPA limit 10000 µg/L Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 2886 µg/L — EL OSO WSC · 6,288 people · 2015 | 3/3 | SYR4 |
| Fluoride | 575 µg/L 14% of the EPA limit 4000 µg/L Main supplier: MCCOY WSC · 9,621 people · 2017
Highest in the ZIP: 998.5 µg/L — EL OSO WSC · 6,288 people · 2017 | 3/3 | SYR4 |
| Copper | 414.7499999999999 µg/L 32% of the EPA limit 1300 µg/L Main supplier: MCCOY WSC · 9,621 people · 2017 | 3/3 | SYR4 |
| Barium | 123 µg/L 6.2% of the EPA limit 2000 µg/L Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 302.25 µg/L — SUNKO WSC · 5,064 people · 2019 | 3/3 | SYR4 |
| TTHM | 63.10000000000001 µg/L 79% of the EPA limit 80 µg/L Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 104.24999999999997 µg/L — EL OSO WSC · 6,288 people · 2019 | 3/3 | SYR4 |
| Lithium | 62.2 µg/L No EPA limit set Main supplier: MCCOY WSC · 9,621 people · 2024
Highest in the ZIP: 76.5 µg/L — EL OSO WSC · 6,288 people · 2024 | 3/3 | UCMR-5 |
| Lead | 3.9399999999999995 µg/L 26% of the EPA limit 15 µg/L Main supplier: MCCOY WSC · 9,621 people · 2017
Highest in the ZIP: 61.5 µg/L — SUNKO WSC · 5,064 people · 2017 | 3/3 | SYR4 |
| Bromoform | 44.77499999999999 µg/L No EPA limit set Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 47.06000000000001 µg/L — EL OSO WSC · 6,288 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 13.36 µg/L No EPA limit set Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 38.040000000000006 µg/L — EL OSO WSC · 6,288 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.68 µg/L 13% of the EPA limit 60 µg/L Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 22.879999999999985 µg/L — EL OSO WSC · 6,288 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 2.7949999999999995 µg/L No EPA limit set Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 15.2 µg/L — EL OSO WSC · 6,288 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 7.68 µg/L No EPA limit set Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 13.559999999999997 µg/L — EL OSO WSC · 6,288 people · 2019 | 3/3 | SYR4 |
| Arsenic | 3.3 µg/L 33% of the EPA limit 10 µg/L Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 13.319999999999999 µg/L — EL OSO WSC · 6,288 people · 2019 | 2/3 | SYR4 |
| Gross Beta Particle Activity | 9.6 pCi/L No EPA limit set Main supplier: MCCOY WSC · 9,621 people · 2019
Highest in the ZIP: 10.07 pCi/L — EL OSO WSC · 6,288 people · 2016 | 3/3 | SYR4 |
| Monochloroacetic Acid | 7.67 µg/L No EPA limit set Highest in the ZIP: EL OSO WSC · 6,288 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 5.3 µg/L No EPA limit set Highest in the ZIP: EL OSO WSC · 6,288 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 5.2 µg/L 17% of the EPA limit 30 µg/L Highest in the ZIP: EL OSO WSC · 6,288 people · 2016 | 1/3 | SYR4 |
| Selenium | 4.8 µg/L 9.6% of the EPA limit 50 µg/L Main supplier: MCCOY WSC · 9,621 people · 2019 | 2/3 | SYR4 |
| Chloroform | 4.5 µg/L No EPA limit set Highest in the ZIP: EL OSO WSC · 6,288 people · 2019 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.6 pCi/L 24% of the EPA limit 15 pCi/L Main supplier: MCCOY WSC · 9,621 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 3.5 µg/L No EPA limit set Highest in the ZIP: EL OSO WSC · 6,288 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 3.1809999999999996 pCi/L 64% of the EPA limit 5 pCi/L Main supplier: MCCOY WSC · 9,621 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 3.05 µg/L No EPA limit set Highest in the ZIP: EL OSO WSC · 6,288 people · 2019 | 1/3 | SYR4 |
| Xylenes, Total | 2.7699999999999996 µg/L 0% of the EPA limit 10000 µg/L Main supplier: MCCOY WSC · 9,621 people · 2019 | 3/3 | SYR4 |
| Styrene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L Highest in the ZIP: EL OSO WSC · 6,288 people · 2019 | 1/3 | SYR4 |
| 6:2 Fts | 0.1190 µg/L No EPA limit set Main supplier: MCCOY WSC · 9,621 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: MCCOY WSC · 9,621 people · 2023
Highest in the ZIP: 0.0014 mg/L — EL OSO WSC · 6,288 people · 2023 | 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 78113
| Supplier | State | Population served |
|---|---|---|
| MCCOY WSC | TX | 9,621 |
| EL OSO WSC | TX | 6,288 |
| SUNKO WSC | TX | 5,064 |
Frequently asked questions about ZIP 78113 tap water
Is the tap water in ZIP 78113 safe to drink?
EPA testing detected 28 contaminants across the water suppliers serving ZIP 78113. 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 78113?
3 public water suppliers report EPA drinking-water monitoring for ZIP 78113. Each is listed above with its population served.
What contaminants are in ZIP 78113's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.