Rancho Borromeo Mwc
Published drinking-water records and contacts for Rancho Borromeo Mwc. System CA2700709. Review sources and dates; not a real-time water assessment.
- System ID
- CA2700709
- State or territory
- CA
- Published population served
- 100
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 17 — 1999-07-01 – 2025-12-31
- California DDW laboratory results: 105 — 2026-01-13 – 2026-06-16
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) | 0.0028 mg/L | 2025-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.0006 mg/L | 2024-01-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2023-01-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2022-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2021-01-01 – 2021-12-31 | 2026Q3 |
| Copper (CU90) | 1.493 mg/L | 2021-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0.0003 mg/L | 2020-01-01 – 2020-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2018-01-01 – 2018-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| BARIUM | 100 UG/L | 2026-06-16 | WELL 01 / California DDW laboratory results |
| ALUMINUM | < 10.000000000 UG/L | 2026-06-16 | WELL 01 / California DDW laboratory results |
| NICKEL | < 5.000000000 UG/L | 2026-06-16 | WELL 01 / California DDW laboratory results |
| CALCIUM | 31 MG/L | 2026-06-16 | WELL 01 / California DDW laboratory results |
| ALKALINITY, BICARBONATE | 104 MG/L | 2026-06-16 | WELL 01 / California DDW laboratory results |
| CONDUCTIVITY @ 25 C UMHOS/CM | 683 UMHO/CM | 2026-06-16 | WELL 01 / California DDW laboratory results |
| CHROMIUM | 5.1 UG/L | 2026-06-16 | WELL 01 / California DDW laboratory results |
| SELENIUM | 2.7 UG/L | 2026-06-16 | WELL 01 / California DDW laboratory results |
| LANGELIER INDEX (PH(S)) | -0.71 LANG | 2026-06-16 | WELL 01 / California DDW laboratory results |
| BERYLLIUM, TOTAL | < 0.500000000 UG/L | 2026-06-16 | WELL 01 / California DDW laboratory results |
| SILVER | < 1.500000000 UG/L | 2026-06-16 | WELL 01 / California DDW laboratory results |
| LEAD | 1.2 UG/L | 2026-06-16 | 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
3 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 / Follow-up Or Routine LCR Tap M/R | 2017-10-01 – — | Unaddressed | 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)
Munoz, Alfred: 831-663-6071
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.