Golden State Water Company-Cypress Ridge
Published drinking-water records and contacts for Golden State Water Company-Cypress Ridge. System CA4010040. Review sources and dates; not a real-time water assessment.
- System ID
- CA4010040
- State or territory
- CA
- Published population served
- 2026
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 31 — 1995-01-01 – 2028-12-31
- California DDW laboratory results: 751 — 2026-01-06 – 2026-07-14
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) | 0.0041 mg/L | 2026-01-01 – 2028-12-31 | 2026Q3 |
| Lead (PB90) | 0.0015 mg/L | 2023-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2020-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0.0022 mg/L | 2017-01-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0.0044 mg/L | 2014-01-01 – 2016-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2012-01-01 – 2014-12-31 | 2026Q3 |
| Lead (PB90) | 0.0088 mg/L | 2010-01-01 – 2012-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2005-01-01 – 2007-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| NITRATE | 6.5 MG/L | 2026-07-14 | CR WELL 07 / California DDW laboratory results |
| NITRATE | 6.5 MG/L | 2026-07-14 | CR WELL 06 / California DDW laboratory results |
| NITRATE | 4.7 MG/L | 2026-07-14 | CR WELL 05 / California DDW laboratory results |
| NITRATE | 6.8 MG/L | 2026-07-14 | RWC WELL 02 (1983) / California DDW laboratory results |
| NITRATE | 4.8 MG/L | 2026-07-14 | RW RESERVOIR NITRATE BLEND / California DDW laboratory results |
| NITRATE | 6.5 MG/L | 2026-07-14 | RWC WELL 07/5A / California DDW laboratory results |
| NITRATE | 8.5 MG/L | 2026-07-14 | RWC WELL 06 (1990) / California DDW laboratory results |
| NITRATE | 6.7 MG/L | 2026-07-14 | CR RESERVOIR NITRATE BLENDING / California DDW laboratory results |
| NITRATE | 6.2 MG/L | 2026-07-14 | RWC WELL 04 (1989) / California DDW laboratory results |
| NITRATE | 6.7 MG/L | 2026-07-07 | RWC WELL 02 (1983) / California DDW laboratory results |
| NITRATE | 6.2 MG/L | 2026-07-07 | RWC WELL 04 (1989) / California DDW laboratory results |
| NITRATE | 4.9 MG/L | 2026-07-07 | CR WELL 05 / 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)
White, Dawn: 916-853-3615
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.