Barton Flats Water System
Published drinking-water records and contacts for Barton Flats Water System. System CA3601048. Review sources and dates; not a real-time water assessment.
- System ID
- CA3601048
- State or territory
- CA
- Published population served
- 1070
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 6 — 2019-01-01 – 2025-12-31
- California DDW laboratory results: 93 — 2026-03-16 – 2026-03-16
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) | 0.0028 mg/L | 2023-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.0028 mg/L | 2023-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.011 mg/L | 2020-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0.011 mg/L | 2020-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2019-07-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0.005 mg/L | 2019-01-01 – 2019-06-30 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| TOLUENE | < 0.500000000 UG/L | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| RADIUM-228 | 0.06 PCI/L | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| ALKALINITY, BICARBONATE | 40 MG/L | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| ANTIMONY, TOTAL | < 6.000000000 UG/L | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| VANADIUM, TOTAL | < 3.000000000 UG/L | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| PH | 7.0 PH | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| TETRACHLOROETHYLENE | < 0.500000000 UG/L | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| ZINC | < 50.000000000 UG/L | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| NITRATE-NITRITE | < 0.400000000 MG/L | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| BARIUM | < 100.000000000 UG/L | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| METHYL TERT-BUTYL ETHER | < 3.000000000 UG/L | 2026-03-16 | SOUTH FORK INTAKE / California DDW laboratory results |
| 1,1,1-TRICHLOROETHANE | < 0.500000000 UG/L | 2026-03-16 | SOUTH FORK INTAKE / 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
13 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 / LSL Inventory | 2024-10-17 – — | Unaddressed | Yes | 2026Q3 |
| Lead and Copper Rule Revisions / LSL Reporting | 2024-10-17 – — | Unaddressed | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2022-01-01 – 2022-12-31 | Resolved | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2022-01-01 – 2022-12-31 | Resolved | No | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 2022-01-01 – 2022-12-31 | Resolved | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2021-01-01 – 2021-12-31 | Resolved | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2021-01-01 – 2021-12-31 | Resolved | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2020-01-01 – 2020-12-31 | Resolved | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2020-01-01 – 2020-12-31 | Resolved | No | 2026Q3 |
| Interim and Long Term 1 Enhanced Surface Water Treatment Rule / Monthly Turbidity Exceed (Enhanced SWTR) | 2017-07-01 – 2017-07-31 | Resolved | Yes | 2026Q3 |
| Interim and Long Term 1 Enhanced Surface Water Treatment Rule / Monthly Turbidity Exceed (Enhanced SWTR) | 2017-06-01 – 2017-06-30 | Resolved | Yes | 2026Q3 |
| Interim and Long Term 1 Enhanced Surface Water Treatment Rule / Monthly Turbidity Exceed (Enhanced SWTR) | 2017-05-01 – 2017-05-31 | Resolved | Yes | 2026Q3 |
| Interim and Long Term 1 Enhanced Surface Water Treatment Rule / Monthly Turbidity Exceed (Enhanced SWTR) | 2017-03-01 – 2017-03-31 | Resolved | Yes | 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)
_valencia, Gabe: 909-794-2824
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.