What was found in ZIP 78017
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 |
|---|---|---|---|
| Fluoride | 519 µg/L 13% of the EPA limit 4000 µg/L Main supplier: CITY OF DILLEY · 4,505 people · 2017 | 1/1 | SYR4 |
| Nitrate-Nitrite | 228.5 µg/L 2.3% of the EPA limit 10000 µg/L Main supplier: CITY OF DILLEY · 4,505 people · 2015 | 1/1 | SYR4 |
| Nitrate | 228.5 µg/L 2.3% of the EPA limit 10000 µg/L Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Copper | 136.35 µg/L 10% of the EPA limit 1300 µg/L Main supplier: CITY OF DILLEY · 4,505 people · 2018 | 1/1 | SYR4 |
| Barium | 102.8 µg/L 5.1% of the EPA limit 2000 µg/L Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Lithium | 41.4 µg/L No EPA limit set Main supplier: CITY OF DILLEY · 4,505 people · 2023 | 1/1 | UCMR-5 |
| TTHM | 20.775 µg/L 26% of the EPA limit 80 µg/L Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Dichloromethane | 8.8 µg/L 176% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 7.21 pCi/L No EPA limit set Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Chloroform | 5.43 µg/L No EPA limit set Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 5.325 µg/L No EPA limit set Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 5.18 µg/L No EPA limit set Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Bromoform | 4.96 µg/L No EPA limit set Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 4.6 pCi/L 92% of the EPA limit 5 pCi/L Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Lead | 2.19 µg/L 15% of the EPA limit 15 µg/L Main supplier: CITY OF DILLEY · 4,505 people · 2018 | 1/1 | SYR4 |
| Dibromoacetic Acid | 1.6 µg/L No EPA limit set Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.6 µg/L 2.7% of the EPA limit 60 µg/L Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 1 µg/L No EPA limit set Main supplier: CITY OF DILLEY · 4,505 people · 2019 | 1/1 | SYR4 |
| Lead | 0.00050 mg/L 3.3% of the EPA limit 0.0150 mg/L Main supplier: CITY OF DILLEY · 4,505 people · 2024 | 1/1 | 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 78017
| Supplier | State | Population served |
|---|---|---|
| CITY OF DILLEY | TX | 4,505 |
Frequently asked questions about ZIP 78017 tap water
Is the tap water in ZIP 78017 safe to drink?
EPA testing detected 19 contaminants across the water suppliers serving ZIP 78017. 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 78017?
1 public water supplier report EPA drinking-water monitoring for ZIP 78017. Each is listed above with its population served.
What contaminants are in ZIP 78017's water?
EPA monitoring detected Fluoride, Nitrate-Nitrite, Nitrate, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.