1 open health-based violation on EPA record.
Serves about 4,340 people (1,353 connections) with surface water from its own intake, and buys water from San Lorenzo Valley Water Dist.
From EPA's record for CA4410002. PurityMap is independent of SLVWD.
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1 health-based violation in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From October 2024 | Lead and copper rule revisions | – | – | Unaddressed |
EPA required this system to test for 30 unregulated and emerging contaminants, from March 2025 to September 2025.
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: SLVWD - FELTON WATER SYSTEM (CA4410002) |
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.
Get PurityMap updates about this water system.
Follow this water →SLVWD's phone number on EPA record is 831-430-4624. Its mailing address is 13060 Hwy 9, BOULDER CREEK, CA 95006.
According to EPA's record, SLVWD uses surface water from its own intake, and buys water from San Lorenzo Valley Water Dist.
EPA's record shows 1 health-based violation for SLVWD in the 10 years to July 9, 2026. EPA's record lists 1 open health-based violation. EPA also lists 2 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in SLVWD's latest lead and copper round, which ended in December 2023. The federal action level is 15 µg/L.
PurityMap has no verified website for SLVWD. Its phone number on EPA record is 831-430-4624. Its mailing address on EPA record is 13060 Hwy 9, BOULDER CREEK, CA 95006. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.