What was found in ZIP 95138
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 | 2/2 | SYR4 |
| Nitrate | 6555 µg/L 66% of the EPA limit 10000 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 2/2 | 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 | 2/2 | SYR4 |
| Barium | 170 µg/L 8.5% of the EPA limit 2000 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 2/2 | SYR4 |
| TTHM | 12.6 µg/L 16% of the EPA limit 80 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019
Highest in the ZIP: 53.4495 µg/L — CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 2/2 | SYR4 |
| Bromoform | 8.64 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2019
Highest in the ZIP: 24.33 µg/L — CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 4.04 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2019
Highest in the ZIP: 20.152 µg/L — CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 2/2 | SYR4 |
| Lithium | 16 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2025 | 2/2 | UCMR-5 |
| Chloroform | 15.974 µg/L No EPA limit set Highest in the ZIP: CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 1/2 | 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
Highest in the ZIP: 13.56 µg/L — CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 2/2 | SYR4 |
| Chromium | 13 µg/L 13% of the EPA limit 100 µg/L Highest in the ZIP: CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 1.1 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2019
Highest in the ZIP: 12.4495 µg/L — CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 2.085 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2019
Highest in the ZIP: 8.065 µg/L — CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 6.68 µg/L No EPA limit set Highest in the ZIP: CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 5.9 µg/L No EPA limit set Highest in the ZIP: CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 1/2 | SYR4 |
| Gross Beta Particle Activity | 4.7 pCi/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2016 | 2/2 | SYR4 |
| Monobromoacetic Acid | 2.22 µg/L No EPA limit set Highest in the ZIP: CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 1/2 | SYR4 |
| Arsenic | 2.1 µg/L 21% of the EPA limit 10 µg/L Highest in the ZIP: CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2019 | 1/2 | SYR4 |
| Mercury | 1.9 µg/L 95% of the EPA limit 2 µg/L Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/2 | 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 | 2/2 | SYR4 |
| Combined Uranium | 0.4381 µg/L 1.5% of the EPA limit 30 µg/L Highest in the ZIP: CITY OF SAN JOSE - EVG/EDV/COY · 101,265 people · 2017 | 1/2 | SYR4 |
| Asbestos | 0.1900 MFL 2.7% of the EPA limit 7 MFL Main supplier: GREAT OAKS WC INC · 110,088 people · 2019 | 1/2 | SYR4 |
| PFHXS | 0.0080 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2025 | 1/2 | UCMR-5 |
| Pfpea | 0.0047 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2025 | 1/2 | UCMR-5 |
| PFOS | 0.0046 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2025 | 1/2 | UCMR-5 |
| Pfhxa | 0.0045 µg/L No EPA limit set Main supplier: GREAT OAKS WC INC · 110,088 people · 2025 | 1/2 | 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 | 2/2 | 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 95138
| Supplier | State | Population served |
|---|---|---|
| GREAT OAKS WC INC | CA | 110,088 |
| CITY OF SAN JOSE - EVG/EDV/COY | CA | 101,265 |
Frequently asked questions about ZIP 95138 tap water
Is the tap water in ZIP 95138 safe to drink?
EPA testing detected 27 contaminants across the water suppliers serving ZIP 95138. 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 95138?
2 public water suppliers report EPA drinking-water monitoring for ZIP 95138. Each is listed above with its population served.
What contaminants are in ZIP 95138's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.