What was found in Point Mugu's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every 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 Highest in the city: U.S.N., SAN NICOLAS ISLAND · 254 people · 2019 | 1/3 | SYR4 |
| Nitrate | 14950 µg/L 150% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Highest in the city: U.S.N., SAN NICOLAS ISLAND · 254 people · 2019 | 1/3 | SYR4 |
| Selenium | 328.3 µg/L 657% of the EPA limit, at the 95th percentile of samples — 50 µg/L Highest in the city: U.S.N., SAN NICOLAS ISLAND · 254 people · 2019 | 1/3 | SYR4 |
| Fluoride | 100 µg/L 2.5% of the EPA limit 4000 µg/L Highest in the city: U.S.N., SAN NICOLAS ISLAND · 254 people · 2019 | 1/3 | SYR4 |
| TTHM | 63 µg/L 79% of the EPA limit 80 µg/L Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019
Highest in the city: 91.5 µg/L — NAVAL BASE VENTURA COUNTY, POINT MUGU · 5,700 people · 2019 | 3/3 | SYR4 |
| Arsenic | 86 µg/L 860% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: U.S.N., SAN NICOLAS ISLAND · 254 people · 2019 | 1/3 | SYR4 |
| Bromoform | 38.45 µg/L No EPA limit set Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019
Highest in the city: 72.25 µg/L — U.S.N., SAN NICOLAS ISLAND · 254 people · 2019 | 3/3 | SYR4 |
| Barium | 52.75 µg/L 2.6% of the EPA limit 2000 µg/L Highest in the city: U.S.N., SAN NICOLAS ISLAND · 254 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 19.45 µg/L No EPA limit set Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019
Highest in the city: 29.25 µg/L — NAVAL BASE VENTURA COUNTY, POINT MUGU · 5,700 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 1.95 µg/L No EPA limit set Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019
Highest in the city: 23.8 µg/L — NAVAL BASE VENTURA COUNTY, POINT MUGU · 5,700 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 13.2 µg/L 22% of the EPA limit 60 µg/L Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019
Highest in the city: 17.9 µg/L — NAVAL BASE VENTURA COUNTY, POINT MUGU · 5,700 people · 2019 | 3/3 | SYR4 |
| Chromium | 17.6 µg/L 18% of the EPA limit 100 µg/L Highest in the city: U.S.N., SAN NICOLAS ISLAND · 254 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 9.2 µg/L No EPA limit set Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019
Highest in the city: 10.35 µg/L — NAVAL BASE VENTURA COUNTY, POINT MUGU · 5,700 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 10 µg/L No EPA limit set Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 6 µg/L No EPA limit set Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019
Highest in the city: 6.3 µg/L — NAVAL BASE VENTURA COUNTY, POINT MUGU · 5,700 people · 2019 | 3/3 | SYR4 |
| Chloroform | 4.9 µg/L No EPA limit set Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 3 µg/L No EPA limit set Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019
Highest in the city: 3.95 µg/L — NAVAL BASE VENTURA COUNTY, POINT MUGU · 5,700 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 2 µg/L No EPA limit set Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 people · 2019
Highest in the city: 2.5 µg/L — U.S.N., SAN NICOLAS ISLAND · 254 people · 2019 | 3/3 | SYR4 |
| Mercury | 0.0490 µg/L 2.5% of the EPA limit 2 µg/L Highest in the city: U.S.N., SAN NICOLAS ISLAND · 254 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: NAVAL BASE VENTURA COUNTY, PORT HUENEME · 8,625 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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Point Mugu
| Supplier | Population served |
|---|---|
| NAVAL BASE VENTURA COUNTY, PORT HUENEME | 8,625 |
| NAVAL BASE VENTURA COUNTY, POINT MUGU | 5,700 |
| U.S.N., SAN NICOLAS ISLAND | 254 |
Frequently asked questions about Point Mugu tap water
Is Point Mugu tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Point Mugu. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Point Mugu?
3 public water suppliers report drinking-water monitoring for Point Mugu, California to the EPA. Each is listed above with its population served.
What contaminants are in Point Mugu's water?
The contaminants EPA monitoring detected in Point Mugu include Nitrate-Nitrite, Nitrate, Selenium, Fluoride, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.