What was found in ZIP 77407
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-Nitrite | 422 µg/L 4.2% of the EPA limit 10000 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2015
Highest in the ZIP: 1055 µg/L — FORT BEND COUNTY MUD 143 WATER VIEW ESTA · 7,245 people · 2015 | 10/14 | SYR4 |
| Nitrate | 649.4999999999999 µg/L 6.5% of the EPA limit 10000 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 952.4999999999998 µg/L — FORT BEND COUNTY MUD 143 WATER VIEW ESTA · 7,245 people · 2019 | 10/14 | SYR4 |
| Copper | 195 µg/L 15% of the EPA limit 1300 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2017
Highest in the ZIP: 548.25 µg/L — FORT BEND COUNTY MUD 118 · 5,346 people · 2019 | 14/14 | SYR4 |
| Fluoride | 371.99999999999994 µg/L 9.3% of the EPA limit 4000 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 542 µg/L — FORT BEND COUNTY MUD 25 · 15,327 people · 2019 | 10/14 | SYR4 |
| Barium | 80.12 µg/L 4% of the EPA limit 2000 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 288.84999999999997 µg/L — FORT BEND COUNTY MUD 25 · 15,327 people · 2019 | 10/14 | SYR4 |
| Cyanide | 60 µg/L 30% of the EPA limit 200 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 180 µg/L — FORT BEND COUNTY MUD 118 · 5,346 people · 2017 | 6/14 | SYR4 |
| Nitrite | 20 µg/L 2% of the EPA limit 1000 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2016
Highest in the ZIP: 175 µg/L — FORT BEND COUNTY MUD 143 WATER VIEW ESTA · 7,245 people · 2017 | 4/14 | SYR4 |
| TTHM | 47.4 µg/L 59% of the EPA limit 80 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 70.33999999999999 µg/L — FORT BEND COUNTY MUD 165 · 4,314 people · 2019 | 14/14 | SYR4 |
| Total Haloacetic Acids (HAA5) | 40.85 µg/L 68% of the EPA limit 60 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 51.99999999999999 µg/L — GRAND MISSION MUD 1 · 6,663 people · 2019 | 14/14 | SYR4 |
| Chloroform | 28.754999999999985 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 38.45 µg/L — GRAND MISSION MUD 1 · 6,663 people · 2019 | 14/14 | SYR4 |
| Dichloroacetic Acid | 28.049999999999997 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 35.329999999999984 µg/L — GRAND MISSION MUD 1 · 6,663 people · 2019 | 14/14 | SYR4 |
| Lead | 27.859999999999992 µg/L 186% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2017 | 14/14 | SYR4 |
| Lithium | 22.5 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2024
Highest in the ZIP: 26.9 µg/L — FORT BEND COUNTY MUD 25 · 15,327 people · 2023 | 13/14 | UCMR-5 |
| Bromodichloromethane | 15.3 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 22.559999999999995 µg/L — FORT BEND COUNTY MUD 165 · 4,314 people · 2019 | 14/14 | SYR4 |
| Dibromochloromethane | 7.549999999999999 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 14.889999999999993 µg/L — FORT BEND COUNTY MUD 165 · 4,314 people · 2019 | 14/14 | SYR4 |
| Trichloroacetic Acid | 8.965 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 13.459999999999992 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 14/14 | SYR4 |
| Monochloroacetic Acid | 6.114999999999998 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 10.6 µg/L — FORT BEND COUNTY MUD 165 · 4,314 people · 2019 | 13/14 | SYR4 |
| Bromoform | 3.2499999999999996 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 9.799999999999997 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 12/14 | SYR4 |
| Dibromoacetic Acid | 4 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 7.225 µg/L — FORT BEND COUNTY MUD 50 · 6,234 people · 2019 | 14/14 | SYR4 |
| Gross Beta Particle Activity | 6.36 pCi/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019 | 8/14 | SYR4 |
| Selenium | 6.175 µg/L 12% of the EPA limit 50 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 25 · 15,327 people · 2019 | 2/14 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1 pCi/L 6.7% of the EPA limit 15 pCi/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 4.7 pCi/L — FORT BEND COUNTY MUD 50 · 6,234 people · 2018 | 7/14 | SYR4 |
| Combined Radium (-226 And -228) | 2.2 pCi/L 44% of the EPA limit 5 pCi/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2014
Highest in the ZIP: 3.9 pCi/L — FORT BEND COUNTY MUD 118 · 5,346 people · 2012 | 8/14 | SYR4 |
| Combined Uranium | 1.6749999999999998 µg/L 5.6% of the EPA limit 30 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 3.08 µg/L — FORT BEND COUNTY MUD 25 · 15,327 people · 2018 | 6/14 | SYR4 |
| Xylenes, Total | 2.9399999999999995 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 25 · 15,327 people · 2019 | 1/14 | SYR4 |
| Arsenic | 2.795 µg/L 28% of the EPA limit 10 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 25 · 15,327 people · 2019 | 5/14 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.8 µg/L 30% of the EPA limit 6 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019 | 4/14 | SYR4 |
| Monobromoacetic Acid | 1.1 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 122 · 3,366 people · 2019 | 1/14 | SYR4 |
| Ethylbenzene | 1.07 µg/L 0.2% of the EPA limit 700 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 25 · 15,327 people · 2019 | 1/14 | SYR4 |
| Atrazine | 0.3690 µg/L 12% of the EPA limit 3 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 0.5040 µg/L — FORT BEND COUNTY MUD 122 · 3,366 people · 2019 | 8/14 | SYR4 |
| Simazine | 0.1465 µg/L 3.7% of the EPA limit 4 µg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2019
Highest in the ZIP: 0.2785 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 8/14 | SYR4 |
| Pfba | 0.0071 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2024
Highest in the ZIP: 0.0217 µg/L — FORT BEND COUNTY MUD 165 · 4,314 people · 2023 | 12/14 | UCMR-5 |
| Pfhxa | 0.0043 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2024
Highest in the ZIP: 0.0091 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 11/14 | UCMR-5 |
| Pfpea | 0.0047 µg/L No EPA limit set Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2024
Highest in the ZIP: 0.0088 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 12/14 | 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 | 2/14 | UCMR-5 |
| PFOS | 0.0043 µg/L No EPA limit set Highest in the ZIP: BIG OAKS MUD · 6,450 people · 2023 | 3/14 | UCMR-5 |
| PFBS | 0.0040 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 4/14 | UCMR-5 |
| PFHXS | 0.0038 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 5/14 | UCMR-5 |
| Lead | 0.00050 mg/L 3.3% of the EPA limit 0.0150 mg/L Main supplier: FORT BEND COUNTY MUD 30 · 16,794 people · 2023
Highest in the ZIP: 0.0025 mg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2025 | 14/14 | 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 77407
| Supplier | State | Population served |
|---|---|---|
| FORT BEND COUNTY MUD 30 | TX | 16,794 |
| FORT BEND COUNTY MUD 25 | TX | 15,327 |
| FORT BEND COUNTY MUD 142 | TX | 11,595 |
| FORT BEND COUNTY MUD 134B | TX | 7,356 |
| FORT BEND COUNTY MUD 134C | TX | 7,260 |
| FORT BEND COUNTY MUD 143 WATER VIEW ESTA | TX | 7,245 |
| GRAND MISSION MUD 1 | TX | 6,663 |
| BIG OAKS MUD | TX | 6,450 |
| FORT BEND COUNTY MUD 50 | TX | 6,234 |
| FORT BEND COUNTY MUD 146 | TX | 5,985 |
| FORT BEND COUNTY MUD 118 | TX | 5,346 |
| FORT BEND COUNTY MUD 165 | TX | 4,314 |
| FORT BEND COUNTY MUD 123 | TX | 4,143 |
| FORT BEND COUNTY MUD 122 | TX | 3,366 |
Frequently asked questions about ZIP 77407 tap water
Is the tap water in ZIP 77407 safe to drink?
EPA testing detected 39 contaminants across the water suppliers serving ZIP 77407. 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 77407?
14 public water suppliers report EPA drinking-water monitoring for ZIP 77407. Each is listed above with its population served.
What contaminants are in ZIP 77407's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Copper, Fluoride, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.