No health-based violations on EPA record since 2016.
Serves about 6,801 people (2,921 connections) with surface water bought from Casitas Municipal Water Dist.
From EPA's record for CA5610014. PurityMap is independent of Ojai Water System.
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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 March 2025 to September 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 37 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| 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 | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-11 to 2025-09-15 | UCMR5 Analytical Results: OJAI WATER SYSTEM (CA5610014) |
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 →Ojai Water System's phone number on EPA record is 805-649-2251. Its mailing address is 1055 Ventura Avenue, OAK VIEW, CA 93022.
According to EPA's record, Ojai Water System uses surface water bought from Casitas Municipal Water Dist.
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 Ojai Water System'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 Ojai Water System. Its phone number on EPA record is 805-649-2251. Its mailing address on EPA record is 1055 Ventura Avenue, OAK VIEW, CA 93022. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.