What was found in ZIP 77450
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 | 396.5 µg/L 9.9% of the EPA limit 4000 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 646 µg/L — INTERSTATE MUD · 6,591 people · 2018 | 10/13 | SYR4 |
| Nitrate | 40 µg/L 0.4% of the EPA limit 10000 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 580 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 8/13 | SYR4 |
| Copper | 164.19999999999996 µg/L 13% of the EPA limit 1300 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2018
Highest in the ZIP: 515.8799999999999 µg/L — CINCO MUD 8 · 5,613 people · 2019 | 13/13 | SYR4 |
| Nitrate-Nitrite | 40 µg/L 0.4% of the EPA limit 10000 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 505 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2015 | 7/13 | SYR4 |
| Barium | 168.8 µg/L 8.4% of the EPA limit 2000 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 245.5 µg/L — HARRIS COUNTY MUD 61 · 2,016 people · 2018 | 10/13 | SYR4 |
| Cyanide | 163 µg/L 82% of the EPA limit 200 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2017 | 1/13 | SYR4 |
| Lead | 8.799999999999997 µg/L 59% of the EPA limit 15 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2018
Highest in the ZIP: 109.27999999999996 µg/L — MEMORIAL MUD · 6,615 people · 2017 | 13/13 | SYR4 |
| Total Haloacetic Acids (HAA5) | 4.5 µg/L 7.5% of the EPA limit 60 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 66.3 µg/L — WEST MEMORIAL MUD · 4,182 people · 2019 | 9/13 | SYR4 |
| TTHM | 23.599999999999994 µg/L 29% of the EPA limit 80 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 53.72 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 12/13 | SYR4 |
| Chloroform | 8.939999999999998 µg/L No EPA limit set Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 36.35 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 5/13 | SYR4 |
| Lithium | 20.6 µg/L No EPA limit set Main supplier: CIMARRON MUD · 19,338 people · 2025
Highest in the ZIP: 36 µg/L — MASON CREEK UTILITY DISTRICT · 8,900 people · 2024 | 13/13 | UCMR-5 |
| Dichloroacetic Acid | 2 µg/L No EPA limit set Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 33.099999999999994 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 5/13 | SYR4 |
| Trichloroacetic Acid | 16.6 µg/L No EPA limit set Highest in the ZIP: WEST MEMORIAL MUD · 4,182 people · 2019 | 3/13 | SYR4 |
| Xylenes, Total | 13.354999999999999 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 15.95 µg/L — WEST MEMORIAL MUD · 4,182 people · 2019 | 6/13 | SYR4 |
| Bromodichloromethane | 7.689999999999998 µg/L No EPA limit set Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 15.899999999999999 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 9/13 | SYR4 |
| Gross Alpha, Excl. Radon And U | 8.274999999999999 pCi/L 55% of the EPA limit 15 pCi/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 14.1 pCi/L — HARRIS COUNTY MUD 61 · 2,016 people · 2018 | 10/13 | SYR4 |
| Bromoform | 1.68 µg/L No EPA limit set Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 13 µg/L — INTERSTATE MUD · 6,591 people · 2019 | 8/13 | SYR4 |
| Dibromochloromethane | 5.359999999999998 µg/L No EPA limit set Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 12.079999999999997 µg/L — INTERSTATE MUD · 6,591 people · 2019 | 12/13 | SYR4 |
| Dibromoacetic Acid | 2.5 µg/L No EPA limit set Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 11.7 µg/L — WEST MEMORIAL MUD · 4,182 people · 2019 | 7/13 | SYR4 |
| Gross Beta Particle Activity | 6.869999999999999 pCi/L No EPA limit set Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 9.655000000000001 pCi/L — HARRIS COUNTY MUD 61 · 2,016 people · 2018 | 7/13 | SYR4 |
| Arsenic | 6.56 µg/L 66% of the EPA limit 10 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 9.65 µg/L — HARRIS COUNTY MUD 81 · 11,514 people · 2018 | 9/13 | SYR4 |
| Selenium | 3.4 µg/L 6.8% of the EPA limit 50 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 5.6 µg/L — HARRIS COUNTY MUD 81 · 11,514 people · 2018 | 6/13 | SYR4 |
| Monochloroacetic Acid | 5.3 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 3/13 | SYR4 |
| Combined Uranium | 1.295 µg/L 4.3% of the EPA limit 30 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 4.6 µg/L — MASON CREEK UTILITY DISTRICT · 8,900 people · 2019 | 6/13 | SYR4 |
| Combined Radium (-226 And -228) | 1.696 pCi/L 34% of the EPA limit 5 pCi/L Main supplier: CIMARRON MUD · 19,338 people · 2019
Highest in the ZIP: 4.385 pCi/L — MEMORIAL MUD · 6,615 people · 2014 | 10/13 | SYR4 |
| Ethylbenzene | 3.5 µg/L 0.5% of the EPA limit 700 µg/L Main supplier: CIMARRON MUD · 19,338 people · 2019 | 3/13 | SYR4 |
| Toluene | 2.2 µg/L 0.2% of the EPA limit 1000 µg/L Highest in the ZIP: WEST MEMORIAL MUD · 4,182 people · 2019 | 1/13 | 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 | 1/13 | SYR4 |
| Monobromoacetic Acid | 1.5 µg/L No EPA limit set Highest in the ZIP: WEST MEMORIAL MUD · 4,182 people · 2019 | 1/13 | SYR4 |
| Simazine | 0.2785 µg/L 7% of the EPA limit 4 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 1/13 | SYR4 |
| Atrazine | 0.2655 µg/L 8.9% of the EPA limit 3 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 1/13 | SYR4 |
| Pfhxa | 0.0091 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 2/13 | UCMR-5 |
| Pfpea | 0.0088 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 2/13 | 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 | 1/13 | UCMR-5 |
| Pfba | 0.0076 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 2/13 | UCMR-5 |
| PFOS | 0.0042 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 1/13 | UCMR-5 |
| PFBS | 0.0040 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 2/13 | UCMR-5 |
| PFHXS | 0.0038 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 2/13 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CIMARRON MUD · 19,338 people · 2024
Highest in the ZIP: 0.0036 mg/L — HARRIS COUNTY MUD 61 · 2,016 people · 2025 | 13/13 | 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 77450
| Supplier | State | Population served |
|---|---|---|
| CIMARRON MUD | TX | 19,338 |
| FORT BEND COUNTY MUD 142 | TX | 11,595 |
| HARRIS COUNTY MUD 81 | TX | 11,514 |
| MASON CREEK UTILITY DISTRICT | TX | 8,900 |
| NOTTINGHAM COUNTRY MUD | TX | 7,089 |
| MEMORIAL MUD | TX | 6,615 |
| INTERSTATE MUD | TX | 6,591 |
| CINCO MUD 8 | TX | 5,613 |
| CORNERSTONES MUD | TX | 5,331 |
| CINCO MUD 2 | TX | 4,743 |
| CINCO MUD 7 | TX | 4,239 |
| WEST MEMORIAL MUD | TX | 4,182 |
| HARRIS COUNTY MUD 61 | TX | 2,016 |
Frequently asked questions about ZIP 77450 tap water
Is the tap water in ZIP 77450 safe to drink?
EPA testing detected 39 contaminants across the water suppliers serving ZIP 77450. 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 77450?
13 public water suppliers report EPA drinking-water monitoring for ZIP 77450. Each is listed above with its population served.
What contaminants are in ZIP 77450's water?
EPA monitoring detected Fluoride, Nitrate, Copper, Nitrate-Nitrite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.