Redwood Heights Mutual Water Company
Published drinking-water records and contacts for Redwood Heights Mutual Water Company. System CA4900639. Review sources and dates; not a real-time water assessment.
- System ID
- CA4900639
- State or territory
- CA
- Published population served
- 30
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 9 — 2002-01-01 – 2024-12-31
- California DDW laboratory results: 63 — 2026-04-15 – 2026-04-15
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 | 2019-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2016-01-01 – 2018-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2011-01-01 – 2013-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2010-01-01 – 2010-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2009-01-01 – 2009-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2009-07-01 – 2009-12-31 | 2026Q3 |
| Lead (PB90) | 0.005 mg/L | 2002-01-01 – 2004-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| HEPTACHLOR EPOXIDE | < 0.004900000 UG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| HEPTACHLOR EPOXIDE | < 0.010000000 UG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| HEPTACHLOR | < 0.010000000 UG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| 2,3,7,8-TCDD | < 0.005000000 NG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| DIQUAT | < 0.400000000 UG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| AROCLOR 1232 | < 0.097000000 UG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| LASSO | < 0.200000000 UG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| BUTACHLOR | < 0.380000000 UG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| PARA-PARA DDT | < 0.004900000 UG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| SIMAZINE | < 1.000000000 UG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| LASSO | < 1.000000000 UG/L | 2026-04-15 | WELL 01 / California DDW laboratory results |
| ATRAZINE | < 0.500000000 UG/L | 2026-04-15 | WELL 01 / 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
40 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 / Variance/Exemption/Other Compliance | 2022-01-01 – 2022-03-31 | Archived | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2021-10-01 – 2021-12-31 | Archived | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2021-07-01 – 2021-09-30 | Archived | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2021-01-01 – 2021-12-31 | Archived | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP) | 2021-01-01 – 2021-12-31 | Archived | No | 2026Q3 |
| Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R | 2017-10-01 – — | Resolved | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2017-05-01 – 2017-05-31 | Resolved | No | 2026Q3 |
| Surface Water Treatment Rule / Failure to Filter (SWTR) | 2012-02-29 – — | Addressed | 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 |
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)
Labranche, Steve: 707-235-3833
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.