Las Deltas Mutual Water Company
Published drinking-water records and contacts for Las Deltas Mutual Water Company. System CA1000054. Review sources and dates; not a real-time water assessment.
- System ID
- CA1000054
- State or territory
- CA
- Published population served
- 375
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 10 — 1999-01-01 – 2026-12-31
- California DDW laboratory results: 95 — 2026-01-15 – 2026-04-24
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) | 0.0008 mg/L | 2024-01-01 – 2026-12-31 | 2026Q3 |
| Lead (PB90) | 0 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 | 2010-01-01 – 2010-12-31 | 2026Q3 |
| Lead (PB90) | 0.012 mg/L | 2009-01-01 – 2009-12-31 | 2026Q3 |
| Lead (PB90) | 0.0025 mg/L | 2008-01-01 – 2008-12-31 | 2026Q3 |
| Lead (PB90) | 0.00805 mg/L | 2007-01-01 – 2007-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| DIBROMOACETIC ACID | 14 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| 1,1,1,2-TETRACHLOROETHANE | < 0.500000000 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| 4-METHYL-2-PENTANONE | < 5.000000000 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| STYRENE | < 0.500000000 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| CIS-1,3-DICHLOROPROPENE | < 3.000000000 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| ACROLEIN | < 20.000000000 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| N-BUTYLBENZENE | < 0.500000000 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| ETHYL-TERT-BUTYL ETHER | < 3.000000000 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| ISOPROPYL ETHER | < 3.000000000 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| CARBON TETRACHLORIDE | < 0.200000000 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| TRICHLOROACETIC ACID | < 1.000000000 UG/L | 2026-04-24 | DBPR Sample / California DDW laboratory results |
| TRICHLOROFLUOROMETHANE | < 0.500000000 UG/L | 2026-04-24 | DBPR Sample / 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
16 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 |
|---|---|---|---|---|
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2024-11-01 – 2024-11-30 | Resolved | No | 2026Q3 |
| Consumer Confidence Rule / Consumer Confidence Report Complete Failure to Report | 2021-07-01 – — | Addressed | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2020-01-01 – 2020-03-31 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2019-07-01 – 2019-09-30 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2019-04-01 – 2019-06-30 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2019-01-01 – 2019-03-31 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2018-10-01 – 2018-12-31 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2018-07-01 – 2018-09-30 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2018-04-01 – 2018-06-30 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2018-01-01 – 2018-03-31 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2017-07-01 – 2017-09-30 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2017-04-01 – 2017-06-30 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2017-01-01 – 2017-03-31 | Archived | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2016-07-01 – 2016-09-30 | Archived | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 1981-10-01 – 1982-09-30 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 1980-10-30 – 1981-10-29 | Archived | 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: 2026-10-18
Administrative contact (EPA filing)
Kellam, Hamish: 559-449-2700
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.