What was found in ZIP 77836
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 | 942.5 µg/L 9.4% of the EPA limit 10000 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 733 µg/L 7.3% of the EPA limit 10000 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 3/3 | SYR4 |
| Copper | 261.6 µg/L 20% of the EPA limit 1300 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 339 µg/L — CITY OF CALDWELL · 4,358 people · 2019 | 3/3 | SYR4 |
| Fluoride | 165 µg/L 4.1% of the EPA limit 4000 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2018
Highest in the ZIP: 208.5 µg/L — CITY OF CALDWELL · 4,358 people · 2017 | 3/3 | SYR4 |
| Barium | 184.2 µg/L 9.2% of the EPA limit 2000 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 3/3 | SYR4 |
| TTHM | 14.22 µg/L 18% of the EPA limit 80 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 40.915 µg/L — CITY OF CALDWELL · 4,358 people · 2019 | 3/3 | SYR4 |
| Lithium | 21 µg/L No EPA limit set Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2023
Highest in the ZIP: 26.8 µg/L — CITY OF CALDWELL · 4,358 people · 2023 | 3/3 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 6.145 µg/L 10% of the EPA limit 60 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 20.675 µg/L — CITY OF CALDWELL · 4,358 people · 2019 | 3/3 | SYR4 |
| Bromate | 19.7625 µg/L 198% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 4.332 µg/L No EPA limit set Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 14.52 µg/L — CITY OF CALDWELL · 4,358 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 2.51 µg/L No EPA limit set Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 13.84 µg/L — CITY OF CALDWELL · 4,358 people · 2019 | 3/3 | SYR4 |
| Selenium | 9.1 µg/L 18% of the EPA limit 50 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 3.32 µg/L No EPA limit set Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 8.9 µg/L — CITY OF CALDWELL · 4,358 people · 2019 | 3/3 | SYR4 |
| Chloroform | 1.773 µg/L No EPA limit set Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 8.82 µg/L — CITY OF CALDWELL · 4,358 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 8.675 pCi/L No EPA limit set Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 2/3 | SYR4 |
| Xylenes, Total | 8.04 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 1.88 µg/L No EPA limit set Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 6.705 µg/L — CITY OF CALDWELL · 4,358 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 2.2 µg/L No EPA limit set Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 5.4 µg/L — CITY OF CALDWELL · 4,358 people · 2019 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.315 pCi/L 35% of the EPA limit 15 pCi/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 1/3 | SYR4 |
| Bromoform | 5.112 µg/L No EPA limit set Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 3/3 | SYR4 |
| Lead | 3.79 µg/L 25% of the EPA limit 15 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 4.78 µg/L — CITY OF CALDWELL · 4,358 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 3.025 pCi/L 61% of the EPA limit 5 pCi/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019
Highest in the ZIP: 3.07 pCi/L — CITY OF CALDWELL · 4,358 people · 2018 | 3/3 | SYR4 |
| Trichloroacetic Acid | 2.88 µg/L No EPA limit set Highest in the ZIP: CITY OF CALDWELL · 4,358 people · 2019 | 1/3 | SYR4 |
| Arsenic | 2.3 µg/L 23% of the EPA limit 10 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 1.9 µg/L 95% of the EPA limit 2 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 1/3 | SYR4 |
| Ethylbenzene | 1.7 µg/L 0.2% of the EPA limit 700 µg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2019 | 1/3 | SYR4 |
| Chromium | 1.6526 µg/L 1.7% of the EPA limit 100 µg/L Highest in the ZIP: MILANO WSC · 4,308 people · 2019 | 1/3 | SYR4 |
| Toluene | 1.37 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the ZIP: MILANO WSC · 4,308 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Highest in the ZIP: CITY OF CALDWELL · 4,358 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.7700 µg/L 13% of the EPA limit 6 µg/L Highest in the ZIP: MILANO WSC · 4,308 people · 2019 | 1/3 | SYR4 |
| PFBS | 0.0035 µg/L No EPA limit set Highest in the ZIP: MILANO WSC · 4,308 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.00083 mg/L 5.5% of the EPA limit 0.0150 mg/L Main supplier: SOUTHWEST MILAM WSC · 11,739 people · 2023
Highest in the ZIP: 0.0011 mg/L — CITY OF CALDWELL · 4,358 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 77836
| Supplier | State | Population served |
|---|---|---|
| SOUTHWEST MILAM WSC | TX | 11,739 |
| CITY OF CALDWELL | TX | 4,358 |
| MILANO WSC | TX | 4,308 |
Frequently asked questions about ZIP 77836 tap water
Is the tap water in ZIP 77836 safe to drink?
EPA testing detected 32 contaminants across the water suppliers serving ZIP 77836. 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 77836?
3 public water suppliers report EPA drinking-water monitoring for ZIP 77836. Each is listed above with its population served.
What contaminants are in ZIP 77836's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Copper, Fluoride, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.