Bayer Research And Development LLC
Published drinking-water records and contacts for Bayer Research And Development LLC. System CA5700785. Review sources and dates; not a real-time water assessment.
- System ID
- CA5700785
- State or territory
- CA
- Published population served
- 178
- System type (source code)
- NTNCWS
Published records and dates
- Lead and copper monitoring summaries: 5 — 2013-01-01 – 2025-12-31
- California DDW laboratory results: 140 — 2026-01-05 – 2026-06-30
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) | 0.007 mg/L | 2023-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0 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 | 2016-01-01 – 2018-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2013-01-01 – 2015-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| NITRITE | < 0.050000000 MG/L | 2026-06-30 | WELL 2 / California DDW laboratory results |
| NITRATE | 0.2 MG/L | 2026-06-02 | BLDG 7 FOUNTAIN RO NITRATE SAMPLE POINT / California DDW laboratory results |
| CHROMIUM, HEX | 0.23 UG/L | 2026-06-02 | BLDG 7 FOUNTAIN RO NITRATE SAMPLE POINT / California DDW laboratory results |
| NITRATE | 0.6 MG/L | 2026-06-02 | POE RO BUILDING 12 BOTTLE FILL STATION / California DDW laboratory results |
| CHROMIUM, HEX | 0.13 UG/L | 2026-06-02 | POE RO BUILDING 12 BOTTLE FILL STATION / California DDW laboratory results |
| HEPTACHLOR | < 0.010000000 UG/L | 2026-05-06 | WELL 2 / California DDW laboratory results |
| PROPACHLOR | < 0.500000000 UG/L | 2026-05-06 | WELL 2 / California DDW laboratory results |
| BENTAZON | < 2.000000000 UG/L | 2026-05-06 | WELL 2 / California DDW laboratory results |
| DI(2-ETHYLHEXYL) PHTHALATE | < 3.000000000 UG/L | 2026-05-06 | WELL 2 / California DDW laboratory results |
| METHOMYL | < 2.000000000 UG/L | 2026-05-06 | WELL 2 / California DDW laboratory results |
| METOLACHLOR | < 0.500000000 UG/L | 2026-05-06 | WELL 2 / California DDW laboratory results |
| TOTAL POLYCHLORINATED BIPHENYLS (PCB) | < 0.500000000 UG/L | 2026-05-06 | WELL 2 / 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)
Rosenberger, Staci: 530-631-9606
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.