Cal-Water Service Co.-Hamilton City
Published drinking-water records and contacts for Cal-Water Service Co.-Hamilton City. System CA1110002. Review sources and dates; not a real-time water assessment.
- System ID
- CA1110002
- State or territory
- CA
- Published population served
- 1799
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 19 — 1993-01-01 – 2026-12-31
- California DDW laboratory results: 125 — 2026-01-20 – 2026-07-13
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 mg/L | 2024-01-01 – 2026-12-31 | 2026Q3 |
| Lead (PB90) | 0.0018 mg/L | 2021-01-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0.00095 mg/L | 2018-01-01 – 2020-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2015-01-01 – 2017-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2012-01-01 – 2014-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2011-01-01 – 2013-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2008-01-01 – 2010-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2007-01-01 – 2007-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| 1,4-DIOXANE | < 0.069000000 UG/L | 2026-07-13 | WELL 02-02 / California DDW laboratory results |
| NITRATE-NITRITE | 3.1 MG/L | 2026-04-21 | WELL 02-02 / California DDW laboratory results |
| TEMPERATURE (CENTIGRADE) | 17.9 C | 2026-04-21 | WELL 02-02 / California DDW laboratory results |
| PH, FIELD | 7.4 PH | 2026-04-21 | WELL 02-02 / California DDW laboratory results |
| ORTHOPHOSPHATE | < 0.300000000 MG/L | 2026-04-21 | WELL 02-02 / California DDW laboratory results |
| SULFATE | 21 MG/L | 2026-04-21 | WELL 02-02 / California DDW laboratory results |
| FLUORIDE | 0.1 MG/L | 2026-04-21 | WELL 02-02 / California DDW laboratory results |
| NITRITE | < 0.400000000 MG/L | 2026-04-21 | WELL 02-02 / California DDW laboratory results |
| NITRATE | 3.1 MG/L | 2026-04-21 | WELL 02-02 / California DDW laboratory results |
| SULFATE | 22 MG/L | 2026-04-20 | WELL 01-01 / California DDW laboratory results |
| TEMPERATURE (CENTIGRADE) | 18.9 C | 2026-04-20 | WELL 01-01 / California DDW laboratory results |
| ORTHOPHOSPHATE | < 0.300000000 MG/L | 2026-04-20 | WELL 01-01 / 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: 2026-10-18
Administrative contact (EPA filing)
James, Sophie: 408-367-8593
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.