PFOS
2.1× the limitPerfluorooctanesulfonic acid
8.3ng/L
Each block = 4.0 ng/L federal MCL (2024)
EPA UCMR 5 · sampled 2024Evidence
Scwa - Arden Park Vista serves 10,068 people from groundwater. 31 results are on record. Two PFAS, PFOA and PFOS, each had a sample above a 2024 EPA limit (not a violation: the limits are judged on a yearly average, due 2029); 1 more is detected with no federal limit, and everything else measured is within its reference or not detected.
Each 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.
8.3ng/L
Each block = 4.0 ng/L federal MCL (2024)
5.5ng/L
Each block = 4.0 ng/L federal MCL (2024)
3,032service lines inventoried
From the utility's inventory reported to EPA (2026Q2). Look up your address with the utility.
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.
A federal limit (an MCL or action level) is an enforceable legal cap; a health goal is often stricter. Meeting the limit is a compliance fact, not a health clearance, and PurityMap publishes no overall compliance verdict.
A tap test can confirm levels at your home before you choose treatment.
PFOS 8.3 ng/L in one EPA sample, above the 4 ng/L limit EPA set in 2024 (+2 more PFAS detected)
Understand water treatment technologies →
Understand:PFAS in Scwa - Arden Park Vista
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★ Best choice: HealthShield™, certified for PFOA and PFOS.
| Pick | Product | Certification | Price | Link |
|---|---|---|---|---|
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PurityMap earns a commission from these links. "Best choice" and "Budget pick" go to certified products first; commission never decides them. As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
SCWA - ARDEN PARK VISTA (PWS ID CA3410002) is a public water system serving 10,068 people in Scwa - Arden Park Vista, California.
SCWA - ARDEN PARK VISTA is on record as drawing from groundwater. The source shapes which contaminants matter most for this system.
PurityMap's record for SCWA - ARDEN PARK VISTA holds 31 findings: 2 above a reference, 1 detected with no limit and 28 not detected, from 31 evidence records. Every finding links to its source; a substance that was never monitored is shown as pending, not as a pass.
PurityMap does not issue a safety verdict. It publishes SCWA - ARDEN PARK VISTA's measured results against each contaminant's benchmark so you can read them in context. Safety depends on the specific finding, your plumbing, and how the water reaches your tap.
The latest published record for SCWA - ARDEN PARK VISTA is dated 2026-10-15. Utilities report on regulatory cycles, so results reflect the monitoring period rather than a live reading.
No. It is assessed at the water-system level from SCWA - ARDEN PARK VISTA's own monitoring. It does not cover the service line to your building or the plumbing inside it, which can add lead and other metals after the water leaves the system. A tap test is the way to know what reaches your glass.
Perfluorooctanesulfonic acid (PFOS), Perfluorooctanoic acid (PFOA) and Perfluoropentanoic acid (PFPeA) were detected in this record. Each finding shows its measured value, its reference and its source on this page.
Start with what the record shows: the PFAS findings above list each measured value against its reference. This record cannot show your home's plumbing, so a tap test tells you what reaches your glass. If you decide to treat your water, look for a filter whose certification covers the specific PFAS compounds in your record; the section "Certified for a concern found here" lists only products with a current certification record for these concerns.
Follow Scwa - Arden Park Vista
One email when a new sampling round is published, a result moves above or below its reference, or the system's score changes.
Follow this water →As listed for this system in EPA's records. Your water bill names your supplier.
| Substance | Result | Reference | Sampled | Status | Evidence |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | 2024-11-13 to 2025-11-04 | Not detected | — |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit) | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | 2024-11-13 to 2025-11-04 | Not detected | View evidence |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluorooctanoic acid (PFOA) | 5.5 ng/L | 4.0 ng/L federal MCL (2024) | 2024-11-13 to 2025-11-04 | Above guideline | View evidence |
| Perfluorooctanesulfonic acid (PFOS) | 8.3 ng/L | 4.0 ng/L federal MCL (2024) | 2024-11-13 to 2025-11-04 | Above guideline | View evidence |
| Perfluoropentanoic acid (PFPeA) | 3.6 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Detected, no limit | View evidence |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | 2024-11-13 to 2025-11-04 | Not detected | — |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit) | 2024-11-13 to 2025-11-04 | Not detected | — |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | 2023–2025 monitoring period | Not detected | View evidence |
UCMR5 Analytical Results
UCMR5 Analytical Results: SCWA - ARDEN PARK VISTA (CA3410002)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: SCWA - ARDEN PARK VISTA (CA3410002)
US EPA SDWIS