Perfluorooctanesulfonic acid
6.2ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: PFOS is above its federal limit (a 2024 limit that water systems have until at least 2029 to meet); everything else measured is within its reference or not detected. San Jose Water serves 1,039,920 residents.
Your water bill or annual water quality report names your actual supplier.
Also supplies: Monte Sereno
The bar is drawn in blocks of the 4.0 ng/L federal MCL (2024), so the length shows how far above it the result sits.
6.2ng/L
Each block = 4.0 ng/L federal MCL (2024)
SAN JOSE WATER (EPA PWSID CA4310011) delivers surface water to 1,039,920 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
1health-based violation in the last 10 years
From EPA SDWIS. Counted once per contaminant per year, as in the Track record score.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Every filing is listed; the Track record score counts at most one per contaminant per year.
Resolved
to Resolved
A tap test can confirm levels at your home before you choose treatment.
PFOS 6.2 ng/L, above the 4 ng/L limit (+1 more PFAS detected)
Each card names which Campbell findings its current certification covers, and which it doesn't.
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PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Campbell, PFOS 6.2 ng/L was measured above the 4 ng/L federal limit in EPA's 2024 testing. SAN JOSE WATER (PWSID CA4310011) has a Purity Score of 66/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
SAN JOSE WATER (PWS ID CA4310011) is the public water system on record for Campbell, California, serving about 1,039,920 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
Yes. In EPA's UCMR 5 testing (2023-02-16 to 2025-02-11), PFOS was measured at 6.2 ng/L against a 4 ng/L federal limit. PFHxS was detected below its limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.
Lead is not in Campbell's current published record. Lead usually enters from a building's own pipes and fixtures, so a certified home test is the way to know yours.
PurityMap's current record for Campbell holds 31 findings: 1 above a reference, 2 detected within the reference and 28 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
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| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 6.2 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Lithium | 10 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2023-02-15 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluorohexanesulfonic acid (PFHxS) | 5.5 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2023–2025 monitoring period | Lead & Copper Rule 90th-percentile: SAN JOSE WATER (CA4310011) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-16 to 2025-02-11 | UCMR5 Analytical Results: SAN JOSE WATER (CA4310011) |
Perfluorooctanesulfonic acid (PFOS)
Perfluorohexanesulfonic acid (PFHxS)
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanoic acid (PFHxA)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: SAN JOSE WATER (CA4310011)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: SAN JOSE WATER (CA4310011)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where San Jose Water reported something related, it's shown below.
Lead at San Jose Water: not detected (90th percentile, 2023–2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.