No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting August 2023.
Serves about 106,000 people (21,749 connections) with surface water bought from City of San Diego, Otay Water District, Sweetwater Authority and 1 more.
From EPA's record for CA3710001. PurityMap is independent of Cal-Am Water Coronado.
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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 August 2023 | E. coli | – | – | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from March 2023 to December 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 65.5 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 | 2023-03-14 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| 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 | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| 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 | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| 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 | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| 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 | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| 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 | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| 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 | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-02 to 2023-12-05 | UCMR5 Analytical Results: CAL-AM WATER CORONADO (CA3710001) |
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 →Cal-Am Water Coronado's phone number on EPA record is 619-446-5703. Its mailing address is 1025 Palm Avenue, IMPERIAL BEACH, CA 91932.
According to EPA's record, Cal-Am Water Coronado uses surface water bought from City of San Diego, Otay Water District, Sweetwater Authority and 1 more.
EPA's record shows 1 health-based violation for Cal-Am Water Coronado in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The latest legal-limit breach on record was in the period starting August 2023. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Cal-Am Water Coronado's latest lead and copper round, which ended in December 2026, was 2 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Cal-Am Water Coronado. Its phone number on EPA record is 619-446-5703. Its mailing address on EPA record is 1025 Palm Avenue, IMPERIAL BEACH, CA 91932. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.