No health-based violations on EPA record since 2016.
Serves about 71,452 people (24,493 connections) with surface water bought from Metropolitan Water Dist. of So. Cal..
From EPA's record for CA1910104. PurityMap is independent of California Water Service Co..
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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 July 2023 to July 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 66.3 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| 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 | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| 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 | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| 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 | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| 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 | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| 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 | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| 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 | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-25 to 2024-07-31 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - PALOS VER (CA1910104) |
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 →California Water Service Co.'s phone number on EPA record is 408-367-8593. Its mailing address is 1720 NORTH FIRST STREET, SAN JOSE, CA 95112.
According to EPA's record, California Water Service Co. uses surface water bought from Metropolitan Water Dist. of So. Cal..
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in California Water Service Co.'s latest lead and copper round, which ended in December 2023, was 1.6 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for California Water Service Co.. Its phone number on EPA record is 408-367-8593. Its mailing address on EPA record is 1720 NORTH FIRST STREET, SAN JOSE, CA 95112. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.