Short answer: No measured result is above a legal limit. Stanford University serves 23,817 residents.
Your water bill or annual water quality report names your actual supplier.
STANFORD UNIVERSITY (EPA PWSID CA4310013) delivers surface water to 23,817 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
The records describe the system. A certified lab test shows what reaches your glass.
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Silver Lake Research
Lead, bacteria, nitrate, copper, iron, chlorine, hardness and pH
What it can't tell you: Each test gives a yes/no or a rough range, not a lab number, and it cannot detect PFAS or arsenic.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
When your results arrive, read them here →
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Stanford, no regulated PFAS were detected in EPA's 2024 testing. STANFORD UNIVERSITY (PWSID CA4310013) has a Purity Score of 99/100 (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.
STANFORD UNIVERSITY (PWS ID CA4310013) is the public water system on record for Stanford, California, serving about 23,817 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
None of the 29 PFAS in EPA's UCMR 5 testing (2024-11-20 to 2025-08-20) was detected. "Not detected" means below the lab's reporting limit, not proven zero.
Lead is not in Stanford'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 Stanford holds 31 findings: 31 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 |
|---|---|---|---|---|---|
| 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 | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| 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 | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| 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 | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| 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 | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| 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 | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2022–2024 monitoring period | Lead & Copper Rule 90th-percentile: STANFORD UNIVERSITY (CA4310013) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| 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 | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-11-20 to 2025-08-20 | UCMR5 Analytical Results: STANFORD UNIVERSITY (CA4310013) |
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)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorooctanesulfonic acid (PFOS)
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: STANFORD UNIVERSITY (CA4310013)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: STANFORD UNIVERSITY (CA4310013)
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 Stanford University reported something related, it's shown below.
Lead at Stanford University: not detected (90th percentile, 2022–2024 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.