Lake Morena'S Oak Shores Mwc
Published drinking-water records and contacts for Lake Morena'S Oak Shores Mwc. System CA3700923. Review sources and dates; not a real-time water assessment.
- System ID
- CA3700923
- State or territory
- CA
- Published population served
- 670
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 15 — 1993-07-01 – 2026-12-31
- California DDW laboratory results: 165 — 2026-01-06 – 2026-06-02
Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.
Published testing results
Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.
“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example
Lead and copper: 90th-percentile summaries
These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0.0069 mg/L | 2024-01-01 – 2026-12-31 | 2026Q3 |
| Lead (PB90) | 0.0086 mg/L | 2023-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2017-01-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0.006 mg/L | 2014-01-01 – 2016-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2013-01-01 – 2013-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2012-01-01 – 2012-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2011-07-01 – 2011-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2011-01-01 – 2011-06-30 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| NITRATE | 5.4 MG/L | 2026-06-02 | EFFLUENT - NITRATE TREATMENT FACILITY / California DDW laboratory results |
| NITRATE | 24 MG/L | 2026-06-02 | INFLUENT - NITRATE TREATMENT FACILITY / California DDW laboratory results |
| COMBINED URANIUM | < 1.000000000 PCI/L | 2026-06-02 | 286K GAL STORAGE TANK / California DDW laboratory results |
| NITRATE | 5.3 MG/L | 2026-06-02 | 286K GAL STORAGE TANK / California DDW laboratory results |
| PERFLUOROCTANE SULFONIC ACID (PFOS) | < 2.000000000 NG/L | 2026-05-11 | WELL 07 / California DDW laboratory results |
| PERFLUOROHEXANOIC ACID (PFHXA) | 31 NG/L | 2026-05-11 | WELL 02 / California DDW laboratory results |
| NITRATE | 4.5 MG/L | 2026-05-11 | 286K GAL STORAGE TANK / California DDW laboratory results |
| PERFLUOROCTANE SULFONIC ACID (PFOS) | 2.0 NG/L | 2026-05-11 | WELL 02 / California DDW laboratory results |
| PERFLUOROHEPTANESULFONIC ACID (PFHPS) | < 2.000000000 NG/L | 2026-05-11 | WELL 07 / California DDW laboratory results |
| PERFLUORO PFMBA | < 2.000000000 NG/L | 2026-05-11 | WELL 02 / California DDW laboratory results |
| PERFLUORO PFMBA | < 2.000000000 NG/L | 2026-05-11 | WELL 07 / California DDW laboratory results |
| PERFLUORONONANOIC ACID (PFNA) | < 2.000000000 NG/L | 2026-05-11 | WELL 02 / California DDW laboratory results |
State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.
Download state records with source notes (CSV)
Published compliance history
9 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Lead and Copper Rule Revisions / LSL Inventory | 2024-10-17 – — | Unaddressed | Yes | 2026Q3 |
| Lead and Copper Rule Revisions / LSL Reporting | 2024-10-17 – — | Unaddressed | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2024-01-01 – 2024-01-31 | Resolved | No | 2026Q3 |
| Total Coliform Rule / Maximum Contaminant Level Violation, Monthly (TCR) | 1999-06-01 – 1999-07-31 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 1989-10-13 – 1990-10-12 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 1986-07-01 – 1987-06-30 | Archived | Yes | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1982-11-01 – 1982-11-30 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 1981-10-01 – 1982-09-30 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 1980-10-30 – 1981-10-29 | Archived | No | 2026Q3 |
Source dates and refresh checks
A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.
- EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
- EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
- EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
- California DDW laboratory results — last successful check: 2026-10-18
Administrative contact (EPA filing)
Leon, Raymond: 619-971-3779
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.