Lake County Csa 21 - North Lakeport
Published drinking-water records and contacts for Lake County Csa 21 - North Lakeport. System CA1710021. Review sources and dates; not a real-time water assessment.
- System ID
- CA1710021
- State or territory
- CA
- Published population served
- 4046
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 19 — 1993-01-01 – 2024-12-31
- California DDW laboratory results: 59 — 2026-01-13 – 2026-06-04
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) | 0.005 mg/L | 2019-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0.0066 mg/L | 2016-01-01 – 2018-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2013-01-01 – 2015-12-31 | 2026Q3 |
| Lead (PB90) | 0.005 mg/L | 2010-01-01 – 2012-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2007-01-01 – 2009-12-31 | 2026Q3 |
| Lead (PB90) | 0.005 mg/L | 2006-01-01 – 2006-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2004-01-01 – 2006-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| BROMATE | < 5.000000000 UG/L | 2026-06-04 | TREATMENTPLANT_CLEAR LAKE - TRTD / California DDW laboratory results |
| BROMATE | < 5.000000000 UG/L | 2026-05-07 | TREATMENTPLANT_CLEAR LAKE - TRTD / California DDW laboratory results |
| MONOCHLOROACETIC ACID | < 2.000000000 UG/L | 2026-04-28 | DBPR Sample / California DDW laboratory results |
| TTHM | 25.63 UG/L | 2026-04-28 | DBPR Sample / California DDW laboratory results |
| DIBROMOACETIC ACID | 1.1 UG/L | 2026-04-28 | DBPR Sample / California DDW laboratory results |
| ODOR | 7.1 TON | 2026-04-28 | TREATMENTPLANT_CLEAR LAKE - TRTD / California DDW laboratory results |
| MANGANESE | < 20.000000000 UG/L | 2026-04-28 | TREATMENTPLANT_CLEAR LAKE - TRTD / California DDW laboratory results |
| DIBROMOCHLOROMETHANE | 1.69 UG/L | 2026-04-28 | DBPR Sample / California DDW laboratory results |
| MONOBROMOACETIC ACID | < 1.000000000 UG/L | 2026-04-28 | DBPR Sample / California DDW laboratory results |
| TRICHLOROACETIC ACID | 4.6 UG/L | 2026-04-28 | DBPR Sample / California DDW laboratory results |
| CHLOROFORM | 18.56 UG/L | 2026-04-28 | DBPR Sample / California DDW laboratory results |
| DICHLOROACETIC ACID | 7.4 UG/L | 2026-04-28 | 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
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: 2026-10-17
Administrative contact (EPA filing)
Borre, Robin: 707-263-3260
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.