North Shore Mwc
Published drinking-water records and contacts for North Shore Mwc. System CA3600184. Review sources and dates; not a real-time water assessment.
- System ID
- CA3600184
- State or territory
- CA
- Published population served
- 7
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 10 — 2015-01-01 – 2027-12-31
- California DDW laboratory results: 36 — 2026-01-05 – 2026-06-10
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 | 2025-01-01 – 2027-12-31 | 2026Q3 |
| Copper (CU90) | 1.595 mg/L | 2025-01-01 – 2027-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2026-01-01 – 2026-06-30 | 2026Q3 |
| Copper (CU90) | 1.595 mg/L | 2023-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2023-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.012 mg/L | 2022-01-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.012 mg/L | 2020-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0.0191 mg/L | 2019-01-01 – 2021-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| COMBINED URANIUM | 1.4 PCI/L | 2026-06-10 | ION EXCHANGE TREATMENT PLANT / California DDW laboratory results |
| COMBINED URANIUM | 2.1 PCI/L | 2026-05-06 | ION EXCHANGE TREATMENT PLANT / California DDW laboratory results |
| IRON | 470 UG/L | 2026-04-06 | VERTICAL WELL #1 / California DDW laboratory results |
| GROSS ALPHA PARTICLE ACTIVITY | 20 PCI/L | 2026-04-06 | VERTICAL WELL #1 / California DDW laboratory results |
| COMBINED URANIUM | 1.3 PCI/L | 2026-04-06 | ION EXCHANGE TREATMENT PLANT / California DDW laboratory results |
| MANGANESE | 140 UG/L | 2026-04-06 | VERTICAL WELL #1 / California DDW laboratory results |
| COMBINED URANIUM | 24 PCI/L | 2026-04-06 | VERTICAL WELL #1 / California DDW laboratory results |
| LEAD | < 5.000000000 UG/L | 2026-04-06 | LCR Tap Sample / California DDW laboratory results |
| COPPER, FREE | 58 UG/L | 2026-04-06 | LCR Tap Sample / California DDW laboratory results |
| LEAD | < 5.000000000 UG/L | 2026-03-26 | LCR Tap Sample / California DDW laboratory results |
| COPPER, FREE | 340 UG/L | 2026-03-26 | LCR Tap Sample / California DDW laboratory results |
| COPPER, FREE | < 50.000000000 UG/L | 2026-03-26 | LCR Tap 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
18 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 |
|---|---|---|---|---|
| Nitrate Rule / Monitoring, Regular | 2022-01-01 – 2022-12-31 | Resolved | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2021-12-01 – 2021-12-31 | Resolved | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2021-01-01 – 2021-03-31 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2020-10-01 – 2020-12-31 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2020-07-01 – 2020-09-30 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2020-04-01 – 2020-06-30 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2020-01-01 – 2020-03-31 | Resolved | Yes | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 2020-01-01 – 2022-12-31 | Resolved | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2019-10-01 – 2019-12-31 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2019-07-01 – 2019-09-30 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2019-04-01 – 2019-06-30 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2019-01-01 – 2019-03-31 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2018-10-01 – 2018-12-31 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2018-07-01 – 2018-09-30 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2018-04-01 – 2018-06-30 | Resolved | Yes | 2026Q3 |
| Radionuclides and Revised Rad Rule / Maximum Contaminant Level Violation, Average | 2018-01-01 – 2018-03-31 | Resolved | Yes | 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: 2026-10-18
Administrative contact (EPA filing)
Sixsmith, Tom: 949-500-6358
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.