County Service Area 7
Published drinking-water records and contacts for County Service Area 7. System CA4100509. Review sources and dates; not a real-time water assessment.
- System ID
- CA4100509
- State or territory
- CA
- Published population served
- 300
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 22 — 2003-01-01 – 2028-12-31
- California DDW laboratory results: 223 — 2026-01-26 – 2026-06-22
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) | 0.0018 mg/L | 2026-01-01 – 2028-12-31 | 2026Q3 |
| Lead (PB90) | 0.0021 mg/L | 2025-07-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.0018 mg/L | 2025-01-01 – 2025-06-30 | 2026Q3 |
| Lead (PB90) | 0.0017 mg/L | 2024-07-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.0011 mg/L | 2024-01-01 – 2024-06-30 | 2026Q3 |
| Lead (PB90) | 0.0028 mg/L | 2023-07-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0.0024 mg/L | 2023-01-01 – 2023-06-30 | 2026Q3 |
| Lead (PB90) | 0.0033 mg/L | 2022-07-01 – 2022-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| MONOBROMOACETIC ACID | < 1.000000000 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| DICHLOROACETIC ACID | 33 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| BROMOFORM | < 1.000000000 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| TTHM | 61 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| MONOCHLOROACETIC ACID | 4 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| DIBROMOCHLOROMETHANE | 9 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| TRICHLOROACETIC ACID | 32 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| DIBROMOACETIC ACID | 3 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| CHLOROFORM | 34 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| BROMODICHLOROMETHANE | 18 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| TOTAL HALOACETIC ACIDS (HAA5) | 72 UG/L | 2026-06-22 | DBPR Sample / California DDW laboratory results |
| PERFLUOROHEXANOIC ACID (PFHXA) | < 2.000000000 NG/L | 2026-04-27 | ALPINE CREEK - RAW / 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
32 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 |
|---|---|---|---|---|
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2025-01-01 – 2025-03-31 | Resolved | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2020-01-01 – 2020-03-31 | Resolved | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2018-04-01 – 2018-06-30 | Resolved | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2018-01-01 – 2018-03-31 | Resolved | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2017-10-01 – 2017-12-31 | Resolved | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2017-07-01 – 2017-09-30 | Resolved | Yes | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-09-01 – 1984-09-30 | Archived | No | 2026Q3 |
| 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 |
| Miscellaneous Other Rules / Notification, Public | 1984-06-01 – 1984-06-30 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-05-01 – 1984-05-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-04-01 – 1984-04-30 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-03-01 – 1984-03-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-02-01 – 1984-02-29 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1984-01-01 – 1984-01-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-12-01 – 1983-12-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-11-01 – 1983-11-30 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-10-01 – 1983-10-31 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-09-01 – 1983-09-30 | Archived | No | 2026Q3 |
| Miscellaneous Other Rules / Notification, Public | 1983-08-01 – 1983-08-31 | 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)
Newman, Tory: 650-599-7390
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.