No open EPA violations as of 2026-10-15.
EPA record checked 2026-10-06
From EPA's record for CA4310014. PurityMap is independent of City of Sunnyvale.
Every community water system publishes one each year. Your water bill or the utility's website links to it.
As listed in EPA's records. Your water bill names your supplier.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.
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31 results are on record. These 5 come first.
| Contaminant | Result | Limit | 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 | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| 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 | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| 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 | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| 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 | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| 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 | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| 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: CITY OF SUNNYVALE (CA4310014) |
| 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 | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| 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 | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-10 to 2025-01-22 | UCMR5 Analytical Results: CITY OF SUNNYVALE (CA4310014) |
0health-based violations in the last 10 years · none open as of 2026-10-15
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit. Meeting a federal limit is a compliance fact, not a health clearance.
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
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
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.
Tested your own tap? Read your results →
One email when a new sampling round is published or a result moves across its reference.
Follow this water →Its phone number on EPA record is 408-730-7561 and its mailing address is P.O. BOX 3707, SUNNYVALE, CA 94088. These details come from the system's EPA record.
PurityMap has no verified website for City of Sunnyvale. Its mailing address on EPA record is P.O. BOX 3707, SUNNYVALE, CA 94088. Your water bill lists the ways to pay. PurityMap does not take payments.
EPA's records list City of Sunnyvale as serving Sunnyvale, California. Your water bill names your supplier.
PurityMap's record for City of Sunnyvale holds results for 29 PFAS substances. None was detected, and none is above a federal legal limit. Each result links to its source in the city report.
No open EPA violations as of 2026-10-15: that is what EPA's record shows for City of Sunnyvale. The record comes from EPA's SDWIS compliance database.
City of Sunnyvale is on EPA record as drawing from surface water.
Start with the hot-or-cold tap check. Where City of Sunnyvale reported something related, it's shown below.
Lead at City of Sunnyvale: not detected (90th percentile, 2023–2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.