Short answer: No measured result is above a legal limit; lithium sits above a screening level. Cal/Am Water Company serves 48,065 residents.
Your water bill or annual water quality report names your actual supplier.
CAL/AM WATER COMPANY - SAN MARINO (EPA PWSID CA1910139) delivers surface water to 48,065 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.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
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.
A tap test can confirm levels at your home before you choose treatment.
PFBA 5.3 ng/L detected (no federal or state limit)
Lithium 91.9 µg/L, above the 10.0 µg/L EPA health reference level
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 →
Each card names which San Marino findings its current certification covers, and which it doesn't.
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No product in our catalogue has verified certification for these concerns yet.
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For San Marino, PFBA 5.3 ng/L was detected, with no federal or state limit. CAL/AM WATER COMPANY - SAN MARINO (PWSID CA1910139) has a Purity Score of 100/100 (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.
CAL/AM WATER COMPANY - SAN MARINO (PWS ID CA1910139) is the public water system on record for San Marino, California, serving about 48,065 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 (2023-05-16 to 2025-01-29), PFBA was detected at 5.3 ng/L. It has no federal or state limit, so PurityMap shows it without grading it. No PFAS with a limit was detected.
Lead is not in San Marino'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 San Marino holds 31 findings: 1 above a reference, 1 detected with no limit and 29 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 |
|---|---|---|---|---|---|
| Lithium | 91.9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluorobutanoic acid (PFBA) | 5.3 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| 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 | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| 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 | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| 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 | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| 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 | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| 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 | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2024–2026 monitoring period (still open) | Lead & Copper Rule 90th-percentile: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| 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 | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-16 to 2025-01-29 | UCMR5 Analytical Results: CAL/AM WATER COMPANY - SAN MARINO (CA1910139) |
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: CAL/AM WATER COMPANY - SAN MARINO (CA1910139)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: CAL/AM WATER COMPANY - SAN MARINO (CA1910139)
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 Cal/Am Water Company reported something related, it's shown below.
Lead at Cal/Am Water Company: not detected (90th percentile, 2024–2026 monitoring period (still open)). 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.