What was found in ZIP 77578
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 | 1830 µg/L 46% of the EPA limit 4000 µg/L Highest in the ZIP: BRAZORIA COUNTY MUD 29 · 5,898 people · 2018 | 2/3 | SYR4 |
| Copper | 543.1 µg/L 42% of the EPA limit 1300 µg/L Main supplier: BRAZORIA COUNTY MUD 6 · 6,926 people · 2019 | 3/3 | SYR4 |
| Barium | 131.4 µg/L 6.6% of the EPA limit 2000 µg/L Highest in the ZIP: BRAZORIA COUNTY MUD 25 · 5,250 people · 2019 | 2/3 | SYR4 |
| Lithium | 20.8 µg/L No EPA limit set Main supplier: BRAZORIA COUNTY MUD 6 · 6,926 people · 2023
Highest in the ZIP: 24.9 µg/L — BRAZORIA COUNTY MUD 25 · 5,250 people · 2024 | 3/3 | UCMR-5 |
| TTHM | 4.62 µg/L 5.8% of the EPA limit 80 µg/L Main supplier: BRAZORIA COUNTY MUD 6 · 6,926 people · 2019
Highest in the ZIP: 12.01 µg/L — BRAZORIA COUNTY MUD 29 · 5,898 people · 2019 | 3/3 | SYR4 |
| Lead | 3.9 µg/L 26% of the EPA limit 15 µg/L Main supplier: BRAZORIA COUNTY MUD 6 · 6,926 people · 2019
Highest in the ZIP: 10.145 µg/L — BRAZORIA COUNTY MUD 25 · 5,250 people · 2017 | 3/3 | SYR4 |
| Nitrate | 10 µg/L 0.1% of the EPA limit 10000 µg/L Highest in the ZIP: BRAZORIA COUNTY MUD 25 · 5,250 people · 2019 | 1/3 | SYR4 |
| Bromoform | 1.86 µg/L No EPA limit set Main supplier: BRAZORIA COUNTY MUD 6 · 6,926 people · 2019
Highest in the ZIP: 7 µg/L — BRAZORIA COUNTY MUD 29 · 5,898 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 2.21 µg/L No EPA limit set Main supplier: BRAZORIA COUNTY MUD 6 · 6,926 people · 2019
Highest in the ZIP: 4.66 µg/L — BRAZORIA COUNTY MUD 29 · 5,898 people · 2019 | 3/3 | SYR4 |
| Arsenic | 4 µg/L 40% of the EPA limit 10 µg/L Highest in the ZIP: BRAZORIA COUNTY MUD 29 · 5,898 people · 2018 | 2/3 | SYR4 |
| Selenium | 3.7 µg/L 7.4% of the EPA limit 50 µg/L Highest in the ZIP: BRAZORIA COUNTY MUD 29 · 5,898 people · 2018 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.2 µg/L No EPA limit set Main supplier: BRAZORIA COUNTY MUD 6 · 6,926 people · 2019
Highest in the ZIP: 1.8 µg/L — BRAZORIA COUNTY MUD 29 · 5,898 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.2 µg/L 2% of the EPA limit 60 µg/L Main supplier: BRAZORIA COUNTY MUD 6 · 6,926 people · 2019
Highest in the ZIP: 1.8 µg/L — BRAZORIA COUNTY MUD 29 · 5,898 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 1.095 µg/L No EPA limit set Main supplier: BRAZORIA COUNTY MUD 6 · 6,926 people · 2019
Highest in the ZIP: 1.78 µg/L — BRAZORIA COUNTY MUD 29 · 5,898 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Highest in the ZIP: BRAZORIA COUNTY MUD 29 · 5,898 people · 2015 | 2/3 | SYR4 |
| Chloroform | 1.4 µg/L No EPA limit set Highest in the ZIP: BRAZORIA COUNTY MUD 25 · 5,250 people · 2019 | 1/3 | SYR4 |
| Lead | 0.00070 mg/L 4.7% of the EPA limit 0.0150 mg/L Main supplier: BRAZORIA COUNTY MUD 6 · 6,926 people · 2025
Highest in the ZIP: 0.0011 mg/L — BRAZORIA COUNTY MUD 25 · 5,250 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 77578
| Supplier | State | Population served |
|---|---|---|
| BRAZORIA COUNTY MUD 6 | TX | 6,926 |
| BRAZORIA COUNTY MUD 29 | TX | 5,898 |
| BRAZORIA COUNTY MUD 25 | TX | 5,250 |
Frequently asked questions about ZIP 77578 tap water
Is the tap water in ZIP 77578 safe to drink?
EPA testing detected 17 contaminants across the water suppliers serving ZIP 77578. 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 77578?
3 public water suppliers report EPA drinking-water monitoring for ZIP 77578. Each is listed above with its population served.
What contaminants are in ZIP 77578's water?
EPA monitoring detected Fluoride, Copper, Barium, Lithium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.