What was found in ZIP 77406
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 | 1525 µg/L 15% of the EPA limit 10000 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019 | 8/8 | SYR4 |
| Nitrate-Nitrite | 1270 µg/L 13% of the EPA limit 10000 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2015 | 8/8 | SYR4 |
| Copper | 366 µg/L 28% of the EPA limit 1300 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2017
Highest in the ZIP: 660 µg/L — TDCJ JESTER UNIT 3 · 3,365 people · 2017 | 7/8 | SYR4 |
| Chlorite | 608.75 µg/L 61% of the EPA limit 1000 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019 | 1/8 | SYR4 |
| Fluoride | 567 µg/L 14% of the EPA limit 4000 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019 | 8/8 | SYR4 |
| Barium | 161.4 µg/L 8.1% of the EPA limit 2000 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 219.5 µg/L — TDCJ JESTER UNIT 3 · 3,365 people · 2019 | 8/8 | SYR4 |
| Cyanide | 138.5 µg/L 69% of the EPA limit 200 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 180 µg/L — FORT BEND COUNTY MUD 118 · 5,346 people · 2017 | 5/8 | SYR4 |
| Nitrite | 175 µg/L 18% of the EPA limit 1000 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 143 WATER VIEW ESTA · 7,245 people · 2017 | 1/8 | SYR4 |
| TTHM | 9.38 µg/L 12% of the EPA limit 80 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 101.325 µg/L — FORT BEND COUNTY MUD 133 · 7,362 people · 2019 | 7/8 | SYR4 |
| Total Haloacetic Acids (HAA5) | 8.24 µg/L 14% of the EPA limit 60 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 60.035 µg/L — FORT BEND COUNTY MUD 133 · 7,362 people · 2019 | 7/8 | SYR4 |
| Chloroform | 3.325 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 52.61 µg/L — FORT BEND COUNTY MUD 133 · 7,362 people · 2019 | 7/8 | SYR4 |
| Dichloroacetic Acid | 7.31 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 37.86 µg/L — FORT BEND COUNTY MUD 133 · 7,362 people · 2019 | 7/8 | SYR4 |
| Bromodichloromethane | 2.2 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 25.46 µg/L — FORT BEND COUNTY MUD 133 · 7,362 people · 2019 | 7/8 | SYR4 |
| Lithium | 12.3 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2025
Highest in the ZIP: 24.1 µg/L — TDCJ JESTER UNIT 3 · 3,365 people · 2025 | 8/8 | UCMR-5 |
| Trichloroacetic Acid | 1.2 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 16.65 µg/L — FORT BEND COUNTY MUD 133 · 7,362 people · 2019 | 7/8 | SYR4 |
| Dibromochloromethane | 3.1 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 10.62 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 7/8 | SYR4 |
| Lead | 10.168 µg/L 68% of the EPA limit 15 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2017 | 7/8 | SYR4 |
| Monochloroacetic Acid | 2 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 9.86 µg/L — FORT BEND COUNTY MUD 50 · 6,234 people · 2019 | 7/8 | SYR4 |
| Bromoform | 4.535 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 9.8 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 7/8 | SYR4 |
| Gross Beta Particle Activity | 7.465 pCi/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2019 | 6/8 | SYR4 |
| Gross Alpha, Excl. Radon And U | 7.23 pCi/L 48% of the EPA limit 15 pCi/L Highest in the ZIP: TDCJ JESTER UNIT 3 · 3,365 people · 2015 | 5/8 | SYR4 |
| Dibromoacetic Acid | 4.115 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2019
Highest in the ZIP: 7.225 µg/L — FORT BEND COUNTY MUD 50 · 6,234 people · 2019 | 7/8 | SYR4 |
| Selenium | 5.3 µg/L 11% of the EPA limit 50 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 143 WATER VIEW ESTA · 7,245 people · 2017 | 2/8 | SYR4 |
| Xylenes, Total | 5.075 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019 | 1/8 | SYR4 |
| Combined Radium (-226 And -228) | 1.82 pCi/L 36% of the EPA limit 5 pCi/L Main supplier: PECAN GROVE MUD · 14,913 people · 2012
Highest in the ZIP: 3.9 pCi/L — FORT BEND COUNTY MUD 118 · 5,346 people · 2012 | 7/8 | SYR4 |
| Simazine | 3.6 µg/L 90% of the EPA limit 4 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019 | 6/8 | SYR4 |
| Arsenic | 2.99 µg/L 30% of the EPA limit 10 µg/L Highest in the ZIP: TDCJ JESTER UNIT 3 · 3,365 people · 2019 | 4/8 | SYR4 |
| Combined Uranium | 2.3 µg/L 7.7% of the EPA limit 30 µg/L Highest in the ZIP: TDCJ JESTER UNIT 3 · 3,365 people · 2015 | 5/8 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.7 µg/L 28% of the EPA limit 6 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 3/8 | SYR4 |
| Ethylbenzene | 0.6950 µg/L 0.1% of the EPA limit 700 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019 | 1/8 | SYR4 |
| Atrazine | 0.4320 µg/L 14% of the EPA limit 3 µg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2019 | 6/8 | SYR4 |
| Pfpea | 0.0923 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2025 | 6/8 | UCMR-5 |
| Pfba | 0.0229 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2025 | 6/8 | UCMR-5 |
| Pfhxa | 0.0064 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2025
Highest in the ZIP: 0.0091 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 5/8 | UCMR-5 |
| 6:2 Fts | 0.0079 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 2/8 | UCMR-5 |
| PFOS | 0.0046 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 133 · 7,362 people · 2023 | 2/8 | UCMR-5 |
| PFBS | 0.0045 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2025 | 4/8 | UCMR-5 |
| PFHXS | 0.0030 µg/L No EPA limit set Main supplier: PECAN GROVE MUD · 14,913 people · 2025
Highest in the ZIP: 0.0039 µg/L — FORT BEND COUNTY MUD 133 · 7,362 people · 2023 | 4/8 | UCMR-5 |
| Lead | 0.0025 mg/L 17% of the EPA limit 0.0150 mg/L Main supplier: PECAN GROVE MUD · 14,913 people · 2023 | 8/8 | 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 77406
| Supplier | State | Population served |
|---|---|---|
| PECAN GROVE MUD | TX | 14,913 |
| FORT BEND COUNTY MUD 142 | TX | 11,595 |
| FORT BEND COUNTY MUD 133 | TX | 7,362 |
| FORT BEND COUNTY MUD 143 WATER VIEW ESTA | TX | 7,245 |
| FORT BEND COUNTY MUD 50 | TX | 6,234 |
| FORT BEND COUNTY MUD 146 | TX | 5,985 |
| FORT BEND COUNTY MUD 118 | TX | 5,346 |
| TDCJ JESTER UNIT 3 | TX | 3,365 |
Frequently asked questions about ZIP 77406 tap water
Is the tap water in ZIP 77406 safe to drink?
EPA testing detected 39 contaminants across the water suppliers serving ZIP 77406. 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 77406?
8 public water suppliers report EPA drinking-water monitoring for ZIP 77406. Each is listed above with its population served.
What contaminants are in ZIP 77406's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Copper, Chlorite, Fluoride, and others across this ZIP's suppliers. The full list with levels and sources is above.