What was found in ZIP 77530
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 | 766.5 µg/L 19% of the EPA limit 4000 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2017
Highest in the ZIP: 1031.5 µg/L — HARRIS COUNTY FWSD 47 · 4,250 people · 2017 | 4/5 | SYR4 |
| Nitrate | 600 µg/L 6% of the EPA limit 10000 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019
Highest in the ZIP: 890 µg/L — HARRIS COUNTY WCID 21 · 13,845 people · 2019 | 5/5 | SYR4 |
| Nitrate-Nitrite | 425 µg/L 4.3% of the EPA limit 10000 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2015
Highest in the ZIP: 576.5 µg/L — HARRIS COUNTY WCID 21 · 13,845 people · 2015 | 3/5 | SYR4 |
| Copper | 241.9 µg/L 19% of the EPA limit 1300 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2017
Highest in the ZIP: 310 µg/L — HARRIS COUNTY FWSD 6 · 2,229 people · 2018 | 5/5 | SYR4 |
| Barium | 133.35 µg/L 6.7% of the EPA limit 2000 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2017
Highest in the ZIP: 161.7 µg/L — HARRIS COUNTY FWSD 6 · 2,229 people · 2018 | 4/5 | SYR4 |
| Cyanide | 147 µg/L 74% of the EPA limit 200 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2017 | 3/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 45.07 µg/L 75% of the EPA limit 60 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019
Highest in the ZIP: 46.14 µg/L — HARRIS COUNTY WCID 21 · 13,845 people · 2019 | 5/5 | SYR4 |
| Chloroform | 28.6 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019
Highest in the ZIP: 41.87 µg/L — HARRIS COUNTY WCID 21 · 13,845 people · 2019 | 5/5 | SYR4 |
| TTHM | 38.8 µg/L 49% of the EPA limit 80 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019 | 5/5 | SYR4 |
| Dichloroacetic Acid | 31.82 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019
Highest in the ZIP: 37.05 µg/L — HARRIS COUNTY WCID 21 · 13,845 people · 2019 | 5/5 | SYR4 |
| Trichloroacetic Acid | 10.51 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019
Highest in the ZIP: 24.19 µg/L — HARRIS COUNTY WCID 21 · 13,845 people · 2019 | 4/5 | SYR4 |
| Nitrite | 19.5 µg/L 2% of the EPA limit 1000 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2015 | 2/5 | SYR4 |
| Lithium | 18.1 µg/L No EPA limit set Highest in the ZIP: HARRIS COUNTY WCID 21 · 13,845 people · 2024 | 4/5 | UCMR-5 |
| Lead | 5.265 µg/L 35% of the EPA limit 15 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2017
Highest in the ZIP: 12.7 µg/L — HARRIS COUNTY FWSD 47 · 4,250 people · 2017 | 5/5 | SYR4 |
| Bromodichloromethane | 12.64 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019 | 5/5 | SYR4 |
| Arsenic | 9.93 µg/L 99% of the EPA limit 10 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2017 | 4/5 | SYR4 |
| Monochloroacetic Acid | 8.685 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019 | 4/5 | SYR4 |
| Dibromochloromethane | 6.575 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019
Highest in the ZIP: 8.4 µg/L — HARRIS COUNTY FWSD 47 · 4,250 people · 2019 | 5/5 | SYR4 |
| Gross Beta Particle Activity | 5.48 pCi/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2017 | 1/5 | SYR4 |
| Bromoform | 1.4 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019
Highest in the ZIP: 4.99 µg/L — HARRIS COUNTY FWSD 6 · 2,229 people · 2019 | 5/5 | SYR4 |
| Dibromoacetic Acid | 2.3 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019
Highest in the ZIP: 2.4 µg/L — HARRIS COUNTY FWSD 47 · 4,250 people · 2019 | 5/5 | SYR4 |
| Dalapon | 1.9 µg/L 1% of the EPA limit 200 µg/L Highest in the ZIP: HARRIS COUNTY WCID 21 · 13,845 people · 2019 | 1/5 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Highest in the ZIP: HARRIS COUNTY FWSD 47 · 4,250 people · 2016 | 3/5 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.7400 µg/L 12% of the EPA limit 6 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019 | 1/5 | SYR4 |
| Benzo(A)Pyrene | 0.4000 µg/L 200% of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019 | 1/5 | SYR4 |
| Simazine | 0.1520 µg/L 3.8% of the EPA limit 4 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019
Highest in the ZIP: 0.3400 µg/L — HARRIS COUNTY FWSD 47 · 4,250 people · 2019 | 3/5 | SYR4 |
| Atrazine | 0.3300 µg/L 11% of the EPA limit 3 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019 | 3/5 | SYR4 |
| Hexachlorocyclopentadiene | 0.1190 µg/L 0.2% of the EPA limit 50 µg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2019 | 1/5 | SYR4 |
| Pfba | 0.0078 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2024
Highest in the ZIP: 0.0082 µg/L — HARRIS COUNTY WCID 21 · 13,845 people · 2024 | 3/5 | UCMR-5 |
| Pfpea | 0.0078 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2024 | 2/5 | UCMR-5 |
| Pfhxa | 0.0070 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2024 | 4/5 | UCMR-5 |
| PFHXS | 0.0040 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2024 | 1/5 | UCMR-5 |
| PFBS | 0.0038 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2024 | 1/5 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: HARRIS COUNTY MUD 53 · 17,856 people · 2023
Highest in the ZIP: 0.0029 mg/L — HARRIS COUNTY WCID 21 · 13,845 people · 2023 | 5/5 | 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 77530
| Supplier | State | Population served |
|---|---|---|
| HARRIS COUNTY MUD 53 | TX | 17,856 |
| HARRIS COUNTY WCID 21 | TX | 13,845 |
| HARRIS COUNTY WCID 84 | TX | 6,552 |
| HARRIS COUNTY FWSD 47 | TX | 4,250 |
| HARRIS COUNTY FWSD 6 | TX | 2,229 |
Frequently asked questions about ZIP 77530 tap water
Is the tap water in ZIP 77530 safe to drink?
EPA testing detected 34 contaminants across the water suppliers serving ZIP 77530. 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 77530?
5 public water suppliers report EPA drinking-water monitoring for ZIP 77530. Each is listed above with its population served.
What contaminants are in ZIP 77530's water?
EPA monitoring detected Fluoride, Nitrate, Nitrate-Nitrite, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.