What was found in ZIP 77083
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 | 780 µg/L 7.8% of the EPA limit 10000 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 9/10 | SYR4 |
| Copper | 338 µg/L 26% of the EPA limit 1300 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019
Highest in the ZIP: 758 µg/L — HARRIS COUNTY MUD 158 · 6,798 people · 2017 | 10/10 | SYR4 |
| Fluoride | 538 µg/L 13% of the EPA limit 4000 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 9/10 | SYR4 |
| Nitrate-Nitrite | 310 µg/L 3.1% of the EPA limit 10000 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019
Highest in the ZIP: 436 µg/L — NORTH MISSION GLEN MUD · 9,096 people · 2015 | 9/10 | SYR4 |
| Barium | 365.4 µg/L 18% of the EPA limit 2000 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 9/10 | SYR4 |
| Cyanide | 93.5 µg/L 47% of the EPA limit 200 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 2/10 | SYR4 |
| Total Haloacetic Acids (HAA5) | 49.97 µg/L 83% of the EPA limit 60 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 8/10 | SYR4 |
| TTHM | 49.635 µg/L 62% of the EPA limit 80 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 10/10 | SYR4 |
| Chloroform | 40.95 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 8/10 | SYR4 |
| Nitrite | 36.5 µg/L 3.7% of the EPA limit 1000 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 3/10 | SYR4 |
| Dichloroacetic Acid | 36.39 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 6/10 | SYR4 |
| Lithium | 33.9 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2025 | 10/10 | UCMR-5 |
| Lead | 10.74 µg/L 72% of the EPA limit 15 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019
Highest in the ZIP: 27.86 µg/L — FORT BEND COUNTY MUD 30 · 16,794 people · 2017 | 10/10 | SYR4 |
| Combined Uranium | 10.77 µg/L 36% of the EPA limit 30 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019
Highest in the ZIP: 15.395 µg/L — BISSONNET MUD · 8,160 people · 2017 | 8/10 | SYR4 |
| Bromodichloromethane | 12.9 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019
Highest in the ZIP: 15.3 µg/L — FORT BEND COUNTY MUD 30 · 16,794 people · 2019 | 8/10 | SYR4 |
| Chromium | 14.11 µg/L 14% of the EPA limit 100 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 1/10 | SYR4 |
| Trichloroacetic Acid | 12.33 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 5/10 | SYR4 |
| Selenium | 10.56 µg/L 21% of the EPA limit 50 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019
Highest in the ZIP: 11.785 µg/L — BISSONNET MUD · 8,160 people · 2019 | 6/10 | SYR4 |
| Gross Alpha, Excl. Radon And U | 10.67 pCi/L 71% of the EPA limit 15 pCi/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 7/10 | SYR4 |
| Monochloroacetic Acid | 9.275 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 5/10 | SYR4 |
| Xylenes, Total | 8.975 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 4/10 | SYR4 |
| Bromoform | 8.655 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 9/10 | SYR4 |
| Dibromochloromethane | 5.2 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019
Highest in the ZIP: 7.905 µg/L — HARRIS COUNTY MUD 158 · 6,798 people · 2019 | 10/10 | SYR4 |
| Gross Beta Particle Activity | 7.23 pCi/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019
Highest in the ZIP: 7.635 pCi/L — BISSONNET MUD · 8,160 people · 2017 | 7/10 | SYR4 |
| Arsenic | 7.08 µg/L 71% of the EPA limit 10 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 7/10 | SYR4 |
| Dibromoacetic Acid | 3.43 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019
Highest in the ZIP: 5.15 µg/L — MISSION BEND MUD 2 · 10,155 people · 2019 | 8/10 | SYR4 |
| Monobromoacetic Acid | 3.975 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 2/10 | SYR4 |
| Combined Radium (-226 And -228) | 3.63 pCi/L 73% of the EPA limit 5 pCi/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 7/10 | SYR4 |
| Ethylbenzene | 2.075 µg/L 0.3% of the EPA limit 700 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 2/10 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.58 µg/L 26% of the EPA limit 6 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019
Highest in the ZIP: 1.8 µg/L — FORT BEND COUNTY MUD 30 · 16,794 people · 2019 | 3/10 | SYR4 |
| Toluene | 1 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 1/10 | SYR4 |
| Dichloromethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 1/10 | SYR4 |
| Atrazine | 0.4650 µg/L 16% of the EPA limit 3 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 3/10 | SYR4 |
| Hexachlorocyclopentadiene | 0.2150 µg/L 0.4% of the EPA limit 50 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 1/10 | SYR4 |
| Simazine | 0.2030 µg/L 5.1% of the EPA limit 4 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 3/10 | SYR4 |
| 6:2 Fts | 0.0426 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2025 | 1/10 | UCMR-5 |
| Benzo(A)Pyrene | 0.0400 µg/L 20% of the EPA limit 0.2000 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 1/10 | SYR4 |
| Pfba | 0.0106 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2025 | 2/10 | UCMR-5 |
| Endrin | 0.0100 µg/L 0.5% of the EPA limit 2 µg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2019 | 1/10 | SYR4 |
| Pfpea | 0.0067 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2025 | 2/10 | UCMR-5 |
| Pfhxa | 0.0051 µg/L No EPA limit set Main supplier: CITY OF HOUSTON · 2,970,543 people · 2025 | 2/10 | UCMR-5 |
| Lead | 0.0050 mg/L 33% of the EPA limit 0.0150 mg/L Main supplier: CITY OF HOUSTON · 2,970,543 people · 2024 | 10/10 | 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 77083
| Supplier | State | Population served |
|---|---|---|
| CITY OF HOUSTON | TX | 2,970,543 |
| FORT BEND COUNTY MUD 30 | TX | 16,794 |
| MISSION BEND MUD 2 | TX | 10,155 |
| NORTH MISSION GLEN MUD | TX | 9,096 |
| CHELFORD CITY MUD | TX | 8,917 |
| BISSONNET MUD | TX | 8,160 |
| HARRIS COUNTY MUD 158 | TX | 6,798 |
| MISSION BEND MUD 1 | TX | 6,546 |
| CHELFORD ONE MUD | TX | 4,557 |
| RENN ROAD MUD | TX | 4,464 |
Frequently asked questions about ZIP 77083 tap water
Is the tap water in ZIP 77083 safe to drink?
EPA testing detected 42 contaminants across the water suppliers serving ZIP 77083. 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 77083?
10 public water suppliers report EPA drinking-water monitoring for ZIP 77083. Each is listed above with its population served.
What contaminants are in ZIP 77083's water?
EPA monitoring detected Nitrate, Copper, Fluoride, Nitrate-Nitrite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.