Blue Oak Terrace Mutual
Published drinking-water records and contacts for Blue Oak Terrace Mutual. System CA0409181. Review sources and dates; not a real-time water assessment.
- System ID
- CA0409181
- State or territory
- CA
- Published population served
- 81
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 6 — 2008-01-01 – 2022-12-31
- California DDW laboratory results: 122 — 2026-02-25 – 2026-03-13
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) | 0.00261 mg/L | 2020-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2017-01-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2014-01-01 – 2016-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2011-01-01 – 2013-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2010-01-01 – 2012-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2008-01-01 – 2010-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| MAGNESIUM | 12 MG/L | 2026-03-13 | WELL 002 / California DDW laboratory results |
| SILVER | < 1.000000000 UG/L | 2026-03-13 | WELL 002 / California DDW laboratory results |
| CALCIUM | 17 MG/L | 2026-03-13 | WELL 002 / California DDW laboratory results |
| NICKEL | < 3.000000000 UG/L | 2026-03-13 | WELL 002 / California DDW laboratory results |
| NITRATE | < 0.400000000 MG/L | 2026-03-13 | WELL 002 / California DDW laboratory results |
| ALKALINITY, CARBONATE | < 10.000000000 MG/L | 2026-03-13 | WELL 002 / California DDW laboratory results |
| HARDNESS, TOTAL (AS CACO3) | 91.8 MG/L | 2026-03-13 | WELL 002 / California DDW laboratory results |
| ODOR | < 1.000000000 TON | 2026-03-13 | WELL 002 / California DDW laboratory results |
| CHROMIUM | 11 UG/L | 2026-03-13 | WELL 002 / California DDW laboratory results |
| LANGELIER INDEX (PH(S)) | -0.6 LANG | 2026-03-13 | WELL 002 / California DDW laboratory results |
| BARIUM | < 1.000000000 UG/L | 2026-03-13 | WELL 002 / California DDW laboratory results |
| SODIUM | 7 MG/L | 2026-03-13 | WELL 002 / 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 / Follow-up Or Routine LCR Tap M/R | 2025-10-01 – — | Unaddressed | No | 2026Q3 |
| Consumer Confidence Rule / Consumer Confidence Report Complete Failure to Report | 2025-07-01 – — | Resolved | No | 2026Q3 |
| Arsenic Rule / Monitoring, Regular | 2020-01-01 – 2022-12-31 | Resolved | No | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 2020-01-01 – 2022-12-31 | Resolved | 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: 2026-10-17
Administrative contact (EPA filing)
Butler, Michael: 530-680-7079
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.