What was found in ZIP 95139
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 | 838000 µg/L 8380% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Nitrate | 6555 µg/L 66% of the EPA limit 10000 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Fluoride | 224.5 µg/L 5.6% of the EPA limit 4000 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Barium | 170 µg/L 8.5% of the EPA limit 2000 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Lithium | 16 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2025 | 1/1 | UCMR-5 |
| TTHM | 12.6 µg/L 16% of the EPA limit 80 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Bromoform | 8.64 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 4.7 pCi/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2016 | 1/1 | SYR4 |
| Dibromochloromethane | 4.04 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.095 µg/L 3.5% of the EPA limit 60 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 2.085 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Mercury | 1.9 µg/L 95% of the EPA limit 2 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| 1,1,1-Trichloroethane | 1.55 µg/L 0.8% of the EPA limit 200 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 1.1 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| Asbestos | 0.1900 MFL 2.7% of the EPA limit 7 MFL Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/1 | SYR4 |
| PFHXS | 0.0080 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2025 | 1/1 | UCMR-5 |
| Pfpea | 0.0047 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2025 | 1/1 | UCMR-5 |
| PFOS | 0.0046 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2025 | 1/1 | UCMR-5 |
| Pfhxa | 0.0045 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2025 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2023 | 1/1 | 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 95139
| Supplier | State | Population served |
|---|---|---|
| GREAT OAKS WC INC | CA | 110,088 |
Frequently asked questions about ZIP 95139 tap water
Is the tap water in ZIP 95139 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 95139. 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 95139?
1 public water supplier report EPA drinking-water monitoring for ZIP 95139. Each is listed above with its population served.
What contaminants are in ZIP 95139'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.