No health-based violations on EPA record since 2016.
Serves about 35,500 people (7,062 connections) with surface water bought from Helix Water District and Padre Dam Municipal Water District.
From EPA's record for CA3710013. PurityMap is independent of Lakeside WD.
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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 April 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 31 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 | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorooctanesulfonic acid (PFOS) | 4.8 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorohexanesulfonic acid (PFHxS) | 4.8 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorobutanesulfonic acid (PFBS) | 4.8 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| 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 | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| 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 | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| 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 | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| 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 | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| 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 | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-18 to 2024-04-02 | UCMR5 Analytical Results: LAKESIDE WD (CA3710013) |
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 →Lakeside WD's phone number on EPA record is 619-443-3805. Its mailing address is 10375 Vine Street, LAKESIDE, CA 92040.
According to EPA's record, Lakeside WD uses surface water bought from Helix Water District and Padre Dam Municipal Water District.
No health-based violations on EPA record since 2016. EPA also lists 3 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 Lakeside WD's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Lakeside WD. Its phone number on EPA record is 619-443-3805. Its mailing address on EPA record is 10375 Vine Street, LAKESIDE, CA 92040. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.