Costanoa Campground
Published drinking-water records and contacts for Costanoa Campground. System CA4100603. Review sources and dates; not a real-time water assessment.
- System ID
- CA4100603
- State or territory
- CA
- Published population served
- 583
- System type (source code)
- NTNCWS
Published records and dates
- Lead and copper monitoring summaries: 44 — 2002-01-01 – 2026-06-30
- California DDW laboratory results: 56 — 2026-01-15 – 2026-06-09
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 |
|---|---|---|---|
| Copper (CU90) | 4.12 mg/L | 2026-01-01 – 2026-06-30 | 2026Q3 |
| Lead (PB90) | 0.0068 mg/L | 2026-01-01 – 2026-06-30 | 2026Q3 |
| Copper (CU90) | 2.68 mg/L | 2025-07-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.0014 mg/L | 2025-07-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.0072 mg/L | 2025-01-01 – 2025-06-30 | 2026Q3 |
| Copper (CU90) | 3.665 mg/L | 2025-01-01 – 2025-06-30 | 2026Q3 |
| Copper (CU90) | 3.665 mg/L | 2025-01-01 – 2025-06-30 | 2026Q3 |
| Lead (PB90) | 0.0072 mg/L | 2025-01-01 – 2025-06-30 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| COPPER, FREE | 3140 UG/L | 2026-06-09 | LCR Tap Sample / California DDW laboratory results |
| BROMOFORM | 22 UG/L | 2026-06-09 | DBPR Sample / California DDW laboratory results |
| MANGANESE | 530 UG/L | 2026-06-09 | WELL #3 / California DDW laboratory results |
| IRON | 6690 UG/L | 2026-06-09 | WELL #3 / California DDW laboratory results |
| ARSENIC | 15.4 UG/L | 2026-06-09 | WELL #3 / California DDW laboratory results |
| DICHLOROACETIC ACID | < 1.000000000 UG/L | 2026-06-09 | DBPR Sample / California DDW laboratory results |
| COPPER, FREE | 5100 UG/L | 2026-06-09 | LCR Tap Sample / California DDW laboratory results |
| TOTAL HALOACETIC ACIDS (HAA5) | < 2.000000000 UG/L | 2026-06-09 | DBPR Sample / California DDW laboratory results |
| LEAD | 1.5 UG/L | 2026-06-09 | LCR Tap Sample / California DDW laboratory results |
| COPPER, FREE | 1040 UG/L | 2026-06-09 | LCR Tap Sample / California DDW laboratory results |
| TRICHLOROACETIC ACID | < 1.000000000 UG/L | 2026-06-09 | DBPR Sample / California DDW laboratory results |
| IRON | < 30.000000000 UG/L | 2026-06-09 | TREATMENT PLANT - TREATED (FE/MN/AS) / 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
5 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 | 2025-10-01 – 2025-12-31 | Resolved | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2025-07-01 – 2025-09-30 | Resolved | Yes | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2025-04-01 – 2025-06-30 | Resolved | Yes | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2020-08-01 – 2020-08-31 | Archived | No | 2026Q3 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule / Maximum Contaminant Level Violation, Average | 2020-07-01 – 2020-09-30 | Resolved | Yes | 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)
Parris, Logan: 650-879-7300
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.