Cws-Split Mountain Water System
Published drinking-water records and contacts for Cws-Split Mountain Water System. System CA1500407. Review sources and dates; not a real-time water assessment.
- System ID
- CA1500407
- State or territory
- CA
- Published population served
- 226
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 25 — 1994-01-01 – 2026-12-31
- California DDW laboratory results: 457 — 2026-01-05 – 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 | 2024-01-01 – 2026-12-31 | 2026Q3 |
| Lead (PB90) | 0.0031 mg/L | 2023-01-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0.0036 mg/L | 2022-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0.0063 mg/L | 2021-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2020-01-01 – 2020-12-31 | 2026Q3 |
| Lead (PB90) | 0.0081 mg/L | 2019-07-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0.00823 mg/L | 2019-01-01 – 2019-06-30 | 2026Q3 |
| Lead (PB90) | 0.0171 mg/L | 2016-01-01 – 2018-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| TEMPERATURE (CENTIGRADE) | 21.3 C | 2026-06-23 | WELL 15 / California DDW laboratory results |
| PH, FIELD | 7.1 PH | 2026-06-23 | WELL 15 / California DDW laboratory results |
| TURBIDITY | 0.20 NTU | 2026-06-23 | WELL 15 / California DDW laboratory results |
| ARSENIC | < 2.000000000 UG/L | 2026-06-18 | HOMESTEAD WELL 02 - DIRECT FILTRATION / California DDW laboratory results |
| ARSENIC | 6.2 UG/L | 2026-06-18 | HOMESTEAD WELL 02 (GWUDI) - RAW / California DDW laboratory results |
| TEMPERATURE (CENTIGRADE) | 19.8 C | 2026-06-16 | WELL 15 / California DDW laboratory results |
| TURBIDITY | 0.10 NTU | 2026-06-16 | WELL 15 / California DDW laboratory results |
| PH, FIELD | 6.6 PH | 2026-06-16 | WELL 15 / California DDW laboratory results |
| MONOBROMOACETIC ACID | < 1.000000000 UG/L | 2026-06-09 | DBPR Sample / California DDW laboratory results |
| MONOCHLOROACETIC ACID | < 2.000000000 UG/L | 2026-06-09 | DBPR Sample / California DDW laboratory results |
| DICHLOROACETIC ACID | 4.8 UG/L | 2026-06-09 | DBPR Sample / California DDW laboratory results |
| TURBIDITY | 0.15 NTU | 2026-06-09 | WELL 15 / 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
4 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 |
|---|---|---|---|---|
| Miscellaneous Other Rules / Notification, Public | 1984-08-01 – 1984-08-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-07-01 – 1984-07-31 | Archived | No | 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: 2026-10-17
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.