Short answer: No measured result is above a legal limit. Triunfo Water & Sanitation District serves 13,898 residents.
Your water bill or annual water quality report names your actual supplier.
TRIUNFO WATER & SANITATION DISTRICT (EPA PWSID CA5610043) delivers surface water to 13,898 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.
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 Oak Park, no regulated PFAS were detected in EPA's 2024 testing. TRIUNFO WATER & SANITATION DISTRICT (PWSID CA5610043) 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.
TRIUNFO WATER & SANITATION DISTRICT (PWS ID CA5610043) is the public water system on record for Oak Park, California, serving about 13,898 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 (2024-09-24 to 2025-06-03) was detected. "Not detected" means below the lab's reporting limit, not proven zero.
Lead is not in Oak Park'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 Oak Park holds 31 findings: 1 detected within the reference and 30 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 | 9.8 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 | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| 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 | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| 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 | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| 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 | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| 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 | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| 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 | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| 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: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| 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 | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-24 to 2025-06-03 | UCMR5 Analytical Results: TRIUNFO WATER & SANITATION DISTRICT (CA5610043) |
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: TRIUNFO WATER & SANITATION DISTRICT (CA5610043)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: TRIUNFO WATER & SANITATION DISTRICT (CA5610043)
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 Triunfo Water & Sanitation District reported something related, it's shown below.
Lead at Triunfo Water & Sanitation District: not detected (90th percentile, 2023–2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
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