San Joaquin Estates Mutual Water Company
Published drinking-water records and contacts for San Joaquin Estates Mutual Water Company. System CA1500575. Review sources and dates; not a real-time water assessment.
- System ID
- CA1500575
- State or territory
- CA
- Published population served
- 165
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 11 — 1995-01-01 – 2024-12-31
- California DDW laboratory results: 4 — 2026-03-27 – 2026-04-20
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) | 0.0007 mg/L | 2022-01-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.0006 mg/L | 2021-01-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0.0006 mg/L | 2021-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0.001 mg/L | 2020-01-01 – 2020-12-31 | 2026Q3 |
| Lead (PB90) | 0.005 mg/L | 2014-01-01 – 2016-12-31 | 2026Q3 |
| Lead (PB90) | 0.002 mg/L | 2013-01-01 – 2013-12-31 | 2026Q3 |
| Lead (PB90) | 0.005 mg/L | 2013-01-01 – 2013-06-30 | 2026Q3 |
| Lead (PB90) | 0.005 mg/L | 1996-01-01 – 1998-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| 1,2,3-TRICHLOROPROPANE | 0.10 UG/L | 2026-04-20 | WELL 01 / California DDW laboratory results |
| NITRATE | 19 MG/L | 2026-04-20 | WELL 01 / California DDW laboratory results |
| NITRATE | 23 MG/L | 2026-03-27 | WELL 01 / California DDW laboratory results |
| 1,2,3-TRICHLOROPROPANE | 0.071 UG/L | 2026-03-27 | WELL 01 / 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
60 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 |
|---|---|---|---|---|
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2026-02-01 – 2026-02-28 | Archived | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2026-01-01 – 2026-01-31 | Archived | No | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2025-07-01 – 2025-09-30 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2025-04-01 – 2025-06-30 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2025-01-01 – 2025-03-31 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2024-10-01 – 2024-12-31 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2024-07-01 – 2024-09-30 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2024-04-01 – 2024-06-30 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2024-01-01 – 2024-03-31 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2023-10-01 – 2023-12-31 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2023-07-01 – 2023-09-30 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2023-04-01 – 2023-06-30 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2023-01-01 – 2023-03-31 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2022-10-01 – 2022-12-31 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2022-07-01 – 2022-09-30 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2022-04-01 – 2022-06-30 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2021-07-01 – 2021-09-30 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2021-04-01 – 2021-06-30 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2021-01-01 – 2021-03-31 | Archived | Yes | 2026Q3 |
| Nitrate Rule / Maximum Contaminant Level Violation, Single Sample | 2020-10-01 – 2020-12-31 | Archived | Yes | 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)
Arrington, Allen: 661-978-5876
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.