What was found in ZIP 77058
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 |
|---|---|---|---|
| Copper | 711.85 µg/L 55% of the EPA limit 1300 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2017
Highest in the ZIP: 1200 µg/L — CITY OF WEBSTER · 13,710 people · 2019 | 3/3 | SYR4 |
| Fluoride | 1054 µg/L 26% of the EPA limit 4000 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2017 | 2/3 | SYR4 |
| Nitrate | 820 µg/L 8.2% of the EPA limit 10000 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 552 µg/L 5.5% of the EPA limit 10000 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2015
Highest in the ZIP: 619 µg/L — CITY OF NASSAU BAY · 5,347 people · 2015 | 2/3 | SYR4 |
| Barium | 133.9 µg/L 6.7% of the EPA limit 2000 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019 | 2/3 | SYR4 |
| Nitrite | 120 µg/L 12% of the EPA limit 1000 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2015 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 50.58 µg/L 84% of the EPA limit 60 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019
Highest in the ZIP: 58.5 µg/L — CITY OF NASSAU BAY · 5,347 people · 2019 | 3/3 | SYR4 |
| TTHM | 50.8 µg/L 64% of the EPA limit 80 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019
Highest in the ZIP: 53.8 µg/L — CITY OF WEBSTER · 13,710 people · 2019 | 3/3 | SYR4 |
| Chloroform | 38.01 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019
Highest in the ZIP: 44.5 µg/L — CITY OF WEBSTER · 13,710 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 35.96 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019
Highest in the ZIP: 41.415 µg/L — CITY OF NASSAU BAY · 5,347 people · 2019 | 3/3 | SYR4 |
| Cyanide | 30 µg/L 15% of the EPA limit 200 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2017 | 1/3 | SYR4 |
| Lead | 7.33 µg/L 49% of the EPA limit 15 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2017
Highest in the ZIP: 16.69 µg/L — CITY OF NASSAU BAY · 5,347 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 15.2 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 11.95 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019
Highest in the ZIP: 14.53 µg/L — CITY OF NASSAU BAY · 5,347 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 6.92 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019
Highest in the ZIP: 14.26 µg/L — CITY OF NASSAU BAY · 5,347 people · 2019 | 3/3 | SYR4 |
| Lithium | 12.9 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2024 | 1/3 | UCMR-5 |
| Bromoform | 11.76 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 7.205 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 5.05 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 4.1 pCi/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2017 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.861 pCi/L 57% of the EPA limit 5 pCi/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2017 | 2/3 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019
Highest in the ZIP: 2.7 µg/L — CITY OF WEBSTER · 13,710 people · 2019 | 3/3 | SYR4 |
| Dalapon | 1.1 µg/L 0.6% of the EPA limit 200 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019 | 1/3 | SYR4 |
| Atrazine | 0.3400 µg/L 11% of the EPA limit 3 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019
Highest in the ZIP: 0.3750 µg/L — CITY OF NASSAU BAY · 5,347 people · 2019 | 2/3 | SYR4 |
| Hexachlorocyclopentadiene | 0.1200 µg/L 0.2% of the EPA limit 50 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019
Highest in the ZIP: 0.1800 µg/L — CITY OF NASSAU BAY · 5,347 people · 2019 | 2/3 | SYR4 |
| Simazine | 0.1630 µg/L 4.1% of the EPA limit 4 µg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2019
Highest in the ZIP: 0.1725 µg/L — CITY OF NASSAU BAY · 5,347 people · 2019 | 2/3 | SYR4 |
| Pfba | 0.0145 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2024 | 3/3 | UCMR-5 |
| Pfpea | 0.0088 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2024
Highest in the ZIP: 0.0099 µg/L — CITY OF WEBSTER · 13,710 people · 2024 | 3/3 | UCMR-5 |
| 6:2 Fts | 0.0097 µg/L No EPA limit set Highest in the ZIP: CITY OF NASSAU BAY · 5,347 people · 2025 | 1/3 | UCMR-5 |
| Pfhxa | 0.0095 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2024 | 3/3 | UCMR-5 |
| PFOS | 0.0067 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2024 | 2/3 | UCMR-5 |
| PFHXS | 0.0060 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2024 | 2/3 | UCMR-5 |
| PFBS | 0.0057 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2024 | 2/3 | UCMR-5 |
| PFOA | 0.0040 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2024 | 1/3 | UCMR-5 |
| Pfhpa | 0.0037 µg/L No EPA limit set Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2024 | 2/3 | UCMR-5 |
| Lead | 0.0012 mg/L 8% of the EPA limit 0.0150 mg/L Main supplier: CLEAR LAKE CITY WATER AUTHORITY · 89,702 people · 2023
Highest in the ZIP: 0.0025 mg/L — CITY OF WEBSTER · 13,710 people · 2025 | 3/3 | 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 77058
| Supplier | State | Population served |
|---|---|---|
| CLEAR LAKE CITY WATER AUTHORITY | TX | 89,702 |
| CITY OF WEBSTER | TX | 13,710 |
| CITY OF NASSAU BAY | TX | 5,347 |
Frequently asked questions about ZIP 77058 tap water
Is the tap water in ZIP 77058 safe to drink?
EPA testing detected 36 contaminants across the water suppliers serving ZIP 77058. 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 77058?
3 public water suppliers report EPA drinking-water monitoring for ZIP 77058. Each is listed above with its population served.
What contaminants are in ZIP 77058's water?
EPA monitoring detected Copper, Fluoride, Nitrate, Nitrate-Nitrite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.