Markham Vineyards
Published drinking-water records and contacts for Markham Vineyards. System CA2800110. Review sources and dates; not a real-time water assessment.
- System ID
- CA2800110
- State or territory
- CA
- Published population served
- 25
- System type (source code)
- TNCWS
Published records and dates
- California DDW laboratory results: 8 — 2026-01-06 – 2026-06-01
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
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| ARSENIC | 9.4 UG/L | 2026-06-01 | TREATMENT PLANT / California DDW laboratory results |
| ARSENIC | 2.9 UG/L | 2026-05-04 | TREATMENT PLANT / California DDW laboratory results |
| ARSENIC | 5.9 UG/L | 2026-04-06 | TREATMENT PLANT / California DDW laboratory results |
| ARSENIC | 14 UG/L | 2026-04-06 | WELL 001 / California DDW laboratory results |
| ARSENIC | 5.3 UG/L | 2026-03-02 | TREATMENT PLANT / California DDW laboratory results |
| ARSENIC | 3.9 UG/L | 2026-02-02 | TREATMENT PLANT / California DDW laboratory results |
| ARSENIC | 18 UG/L | 2026-01-06 | WELL 001 / California DDW laboratory results |
| ARSENIC | 6.4 UG/L | 2026-01-06 | TREATMENT PLANT / 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
0 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
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: 2026-10-17
Administrative contact (EPA filing)
Uboldi, Adrienne: 707-963-5292
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.