What was found in ZIP 93436
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 | 200000 µg/L 2000% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019
Highest in the ZIP: 640000 µg/L — MISSION HILLS CSD · 3,600 people · 2015 | 2/3 | SYR4 |
| Nitrate | 605 µg/L 6.1% of the EPA limit 10000 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019
Highest in the ZIP: 7695 µg/L — MISSION HILLS CSD · 3,600 people · 2019 | 2/3 | SYR4 |
| Fluoride | 400 µg/L 10% of the EPA limit 4000 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 3/3 | SYR4 |
| Barium | 82.61 µg/L 4.1% of the EPA limit 2000 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019
Highest in the ZIP: 104.3 µg/L — MISSION HILLS CSD · 3,600 people · 2018 | 2/3 | SYR4 |
| Lithium | 40.5 µg/L No EPA limit set Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2024
Highest in the ZIP: 72.2 µg/L — VANDENBERG VILLAGE COMM. SERV. DIST. · 7,308 people · 2025 | 3/3 | UCMR-5 |
| Chromium | 13.3 µg/L 13% of the EPA limit 100 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019
Highest in the ZIP: 45.3 µg/L — MISSION HILLS CSD · 3,600 people · 2018 | 2/3 | SYR4 |
| TTHM | 36 µg/L 45% of the EPA limit 80 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 3/3 | SYR4 |
| Selenium | 10 µg/L 20% of the EPA limit 50 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019
Highest in the ZIP: 24.21 µg/L — MISSION HILLS CSD · 3,600 people · 2018 | 2/3 | SYR4 |
| Bromoform | 13.165 µg/L No EPA limit set Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019
Highest in the ZIP: 17.18 µg/L — VANDENBERG VILLAGE COMM. SERV. DIST. · 7,308 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 15.87 µg/L No EPA limit set Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 3/3 | SYR4 |
| Arsenic | 13.5 µg/L 135% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 3/3 | SYR4 |
| Copper | 10 µg/L 0.8% of the EPA limit 1300 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7 µg/L 12% of the EPA limit 60 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019
Highest in the ZIP: 9.18 µg/L — VANDENBERG VILLAGE COMM. SERV. DIST. · 7,308 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 7.48 µg/L No EPA limit set Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 7.30845 µg/L 24% of the EPA limit 30 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2018 | 1/3 | SYR4 |
| Dibromoacetic Acid | 6 µg/L No EPA limit set Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019
Highest in the ZIP: 6.06 µg/L — VANDENBERG VILLAGE COMM. SERV. DIST. · 7,308 people · 2019 | 3/3 | SYR4 |
| Chloroform | 3.1 µg/L No EPA limit set Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 2.8 µg/L No EPA limit set Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 2 µg/L No EPA limit set Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 1 µg/L No EPA limit set Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019
Highest in the ZIP: 1.5 µg/L — VANDENBERG VILLAGE COMM. SERV. DIST. · 7,308 people · 2019 | 2/3 | SYR4 |
| Lead | 1.025 µg/L 6.8% of the EPA limit 15 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 1/3 | SYR4 |
| Cadmium | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 1/3 | SYR4 |
| Mercury | 0.2110 µg/L 11% of the EPA limit 2 µg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: LOMPOC-CITY WATER UTILITY DIV · 40,473 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 93436
| Supplier | State | Population served |
|---|---|---|
| LOMPOC-CITY WATER UTILITY DIV | CA | 40,473 |
| VANDENBERG VILLAGE COMM. SERV. DIST. | CA | 7,308 |
| MISSION HILLS CSD | CA | 3,600 |
Frequently asked questions about ZIP 93436 tap water
Is the tap water in ZIP 93436 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 93436. 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 93436?
3 public water suppliers report EPA drinking-water monitoring for ZIP 93436. Each is listed above with its population served.
What contaminants are in ZIP 93436's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.