No health-based violations on EPA record since 2016.
Serves about 26,240 people (5,047 connections) with surface water bought from Metropolitan Water Dist. of So. Cal..
From EPA's record for CA1910223. PurityMap is independent of GSWC-South San Gabriel.
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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 October 2023 to July 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 57 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluorobutanoic acid (PFBA) | 5.6 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| 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 | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-10-10 to 2024-07-09 | UCMR5 Analytical Results: GSWC-SOUTH SAN GABRIEL (CA1910223) |
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 →GSWC-South San Gabriel's phone number on EPA record is 760-515-8322. Its mailing address is 401 S. San Dimas Canyon Road, SAN DIMAS, CA 91773.
According to EPA's record, GSWC-South San Gabriel 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.
Lead was not detected at the 90th percentile of tap samples in GSWC-South San Gabriel'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 GSWC-South San Gabriel. Its phone number on EPA record is 760-515-8322. Its mailing address on EPA record is 401 S. San Dimas Canyon Road, SAN DIMAS, CA 91773. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.