Mjusd Cordua School
Published drinking-water records and contacts for Mjusd Cordua School. System CA5800840. Review sources and dates; not a real-time water assessment.
- System ID
- CA5800840
- State or territory
- CA
- Published population served
- 110
- System type (source code)
- NTNCWS
Published records and dates
- Lead and copper monitoring summaries: 20 — 2006-01-01 – 2026-06-30
- California DDW laboratory results: 402 — 2026-01-15 – 2026-06-25
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) | 0.0072 mg/L | 2026-01-01 – 2026-06-30 | 2026Q3 |
| Lead (PB90) | 0.00626 mg/L | 2025-07-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.00708 mg/L | 2025-01-01 – 2025-06-30 | 2026Q3 |
| Lead (PB90) | 0.00774 mg/L | 2024-07-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.00611 mg/L | 2024-01-01 – 2024-06-30 | 2026Q3 |
| Lead (PB90) | 0.0259 mg/L | 2023-07-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0.0224 mg/L | 2022-07-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0.127 mg/L | 2022-01-01 – 2022-06-30 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| COPPER, FREE | 180 UG/L | 2026-06-25 | END IF DISTRIBUTION / California DDW laboratory results |
| HYDROXIDE AS CALCIUM CARBONATE | < 4.100000000 MG/L | 2026-06-25 | ENTRY POINT / California DDW laboratory results |
| HYDROXIDE AS CALCIUM CARBONATE | < 4.100000000 MG/L | 2026-06-25 | END IF DISTRIBUTION / California DDW laboratory results |
| LEAD | 2.8 UG/L | 2026-06-25 | WELL / California DDW laboratory results |
| CALCIUM | 15 MG/L | 2026-06-25 | ENTRY POINT / California DDW laboratory results |
| CONDUCTIVITY @ 25 C UMHOS/CM | 191 UMHO/CM | 2026-06-25 | END IF DISTRIBUTION / California DDW laboratory results |
| ALKALINITY, TOTAL | 67 MG/L | 2026-06-25 | WELL / California DDW laboratory results |
| ALKALINITY, CARBONATE | < 4.100000000 MG/L | 2026-06-25 | END IF DISTRIBUTION / California DDW laboratory results |
| CALCIUM | 14 MG/L | 2026-06-25 | WELL / California DDW laboratory results |
| COPPER, FREE | 92 UG/L | 2026-06-25 | WELL / California DDW laboratory results |
| LEAD | < 1.000000000 UG/L | 2026-06-25 | END IF DISTRIBUTION / California DDW laboratory results |
| ALKALINITY, BICARBONATE | 67 MG/L | 2026-06-25 | WELL / 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
4 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 / Notification, Known or Potential LSL | 2025-07-02 – — | Unaddressed | No | 2026Q3 |
| Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R | 2023-07-01 – — | Addressed | No | 2026Q3 |
| Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R | 2021-01-01 – — | Addressed | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1982-12-01 – 1982-12-31 | 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)
Upton, John: 530-788-8439
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.