No health-based violations on EPA record since 2016.
Serves about 4,102 people (1,250 connections) with groundwater from its own wells.
From EPA's record for CA1710007. PurityMap is independent of Kelseyville Co Waterworks District 3.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2025 to August 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 | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| 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 | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| 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 | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| 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 | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| 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 | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| 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 | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| 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 | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-08-05 | UCMR5 Analytical Results: KELSEYVILLE CO WATERWORKS DISTRICT 3 (CA1710007) |
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 →Kelseyville Co Waterworks District 3's phone number on EPA record is 707-263-3260. Its mailing address is 230 N. Main Street, LAKEPORT, CA 95453.
According to EPA's record, Kelseyville Co Waterworks District 3 uses groundwater from its own wells.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Kelseyville Co Waterworks District 3's latest lead and copper round, which ended in December 2024, was 5.2 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Kelseyville Co Waterworks District 3. Its phone number on EPA record is 707-263-3260. Its mailing address on EPA record is 230 N. Main Street, LAKEPORT, CA 95453. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.