Twin Lakes Resort
Published drinking-water records and contacts for Twin Lakes Resort. System CA3701793. Review sources and dates; not a real-time water assessment.
- System ID
- CA3701793
- State or territory
- CA
- Published population served
- 400
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 4 — 2010-01-01 – 2024-12-31
- California DDW laboratory results: 8 — 2026-03-18 – 2026-06-23
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 | 2022-01-01 – 2024-12-31 | 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 |
| Lead (PB90) | 0 mg/L | 2010-01-01 – 2012-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| COMBINED URANIUM | 14 PCI/L | 2026-06-23 | TREATMENT PLANT 01 - IX EFFLUENT / California DDW laboratory results |
| ARSENIC | < 2.000000000 UG/L | 2026-06-23 | TREATMENT PLANT 01 - IX EFFLUENT / California DDW laboratory results |
| RADIUM-228 | < 0.690000000 PCI/L | 2026-03-25 | WELL 07 / California DDW laboratory results |
| COMBINED URANIUM | 19.9 PCI/L | 2026-03-25 | WELL 07 / California DDW laboratory results |
| COMBINED RADIUM (-226 & -228) | < 0.690000000 PCI/L | 2026-03-25 | WELL 07 / California DDW laboratory results |
| RADIUM-226 | < 0.410000000 PCI/L | 2026-03-25 | WELL 07 / California DDW laboratory results |
| GROSS ALPHA PARTICLE ACTIVITY | 30.5 PCI/L | 2026-03-25 | WELL 07 / California DDW laboratory results |
| ARSENIC | < 2.000000000 UG/L | 2026-03-18 | WELL 07 / 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
72 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 |
|---|---|---|---|---|
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2026-01-01 – 2026-03-31 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2025-10-01 – 2025-12-31 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2025-07-01 – 2025-09-30 | Archived | No | 2026Q3 |
| Arsenic Rule / Maximum Contaminant Level Violation, Average | 2025-04-01 – 2025-06-30 | Archived | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2025-04-01 – 2025-06-30 | Archived | No | 2026Q3 |
| Arsenic Rule / Maximum Contaminant Level Violation, Average | 2025-01-01 – 2025-03-31 | Archived | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2025-01-01 – 2025-03-31 | Archived | No | 2026Q3 |
| Arsenic Rule / Maximum Contaminant Level Violation, Average | 2024-10-01 – 2024-12-31 | Archived | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2024-10-01 – 2024-12-31 | Archived | No | 2026Q3 |
| Arsenic Rule / Maximum Contaminant Level Violation, Average | 2024-07-01 – 2024-09-30 | Archived | Yes | 2026Q3 |
| Arsenic Rule / Monitoring, Check/Repeat/Confirmation | 2024-07-01 – 2024-09-30 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2024-07-01 – 2024-09-30 | Archived | No | 2026Q3 |
| Arsenic Rule / Maximum Contaminant Level Violation, Average | 2024-04-01 – 2024-06-30 | Archived | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2024-04-01 – 2024-06-30 | Archived | No | 2026Q3 |
| Arsenic Rule / Maximum Contaminant Level Violation, Average | 2024-01-01 – 2024-03-31 | Archived | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2024-01-01 – 2024-03-31 | Archived | No | 2026Q3 |
| Arsenic Rule / Maximum Contaminant Level Violation, Average | 2023-10-01 – 2023-12-31 | Archived | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2023-10-01 – 2023-12-31 | Archived | No | 2026Q3 |
| Arsenic Rule / Maximum Contaminant Level Violation, Average | 2023-07-01 – 2023-09-30 | Archived | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Check/Repeat/Confirmation | 2023-07-01 – 2023-09-30 | 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)
Gonzalez, Georgina: 619-283-6432
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.