Mercury Systems
Active WDID 4 56I030103 Oxnard, Ventura County Region 4 · Los Angeles
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Oxnard, Ventura County
- Region 4 · Los Angeles · Location · Statewide map
- Identified receiving water on the 2026 303(d) list
- Not established
- Shown only when the reported receiving water is identified and corroborated.
- 2026 Integrated Report waters within 1.0 km Evidence: geographic proximity
- 1 waterbody; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 70 distinct results, 3 reporting years (2023 to 2025)
- Most recent sample Nov 20, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 0 inspections · 1 violation record · 1 enforcement action
- Counts as published in SMARTS; not a compliance determination · Details
Each label shows where a statement comes from. How to read the labels.
Overview and location
Reported facility location HUC12 watershed Corroborated receiving water 2026 Integrated Report waterbodies nearby
Reported location Evidence: facility-reported
- Coordinates
- 34.20363, -119.12625
- Precision
- 5 decimal places
- Shared point
- 2 permits report this exact point
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 300 North Del Norte Boulevard, Oxnard 93030
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Mugu Lagoon HUC12 180701030201
The facility's reported location lies within this HUC12 watershed (spatial derivation); it is not a discharge location.
Permits and applications Evidence: SMARTS record
Current permit record
- Permit type
- Industrial
- Application type
- Notice of Intent (WDID code I)
- Status
- Active
- Operator
- Mercury Systems
- Primary industry (SIC)
- 3679-Electronic Components, NEC
- Application ID
- 556258
- NOI processed
- Feb 13, 2023
- Last certified
- Feb 05, 2025
- Facility size
- 1.82 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 556258 | Industrial | Active | Feb 13, 2023 | — | Feb 05, 2025 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Beardsley Wash
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: not confirmed Not matchable to a single waterbody
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
Impaired waters and TMDLs
Two kinds of information, kept apart: 2026 Integrated Report waterbodies near the reported location (geographic proximity only), and TMDL records that SMARTS lists for this facility. Neither establishes where the facility discharges; see Receiving water for the facility's own statement.
Nearby waterbodies Evidence: geographic proximity
Spatial proximity only; discharge pathway not established. Being near a waterbody does not mean the facility discharges to it.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Duck Pond Agricultural Drains/Mugu Drain/Oxnard Drain No 2 CAR4031100020000228145414 | 924 m | listed | 20 |
Waterbodies within 1.0 km of the reported facility location. Method proximity/1.
SMARTS TMDL records Evidence: SMARTS-reported
No TMDL records for this facility in the SMARTS TMDL export.
Reported monitoring results Evidence: facility-reported
Numeric Action Level (NAL) screening is being independently validated and is not shown. Nothing on this page states whether a result exceeded a NAL.
70 distinct measurements across 11 parameters, most recent sample Nov 20, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 33 | 11 | 0 | Nov 20, 2025 | Nov 20, 2025 |
| 2024 | 10 | 10 | 0 | Nov 26, 2024 | Nov 26, 2024 |
| 2023 | 27 | 9 | 0 | Dec 20, 2023 | Dec 20, 2023 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Boron, Total | ug/L | 7 | 3 | Dec 20, 2023 | Nov 20, 2025 | Results |
| Chloride | mg/L | 7 | 0 | Dec 20, 2023 | Nov 20, 2025 | Results |
| Copper, Total | mg/L | 7 | 2 | Dec 20, 2023 | Nov 20, 2025 | Results |
| Mercury, Total | ug/L | 7 | 6 | Dec 20, 2023 | Nov 20, 2025 | Results |
| Nickel, Total | mg/L | 7 | 3 | Dec 20, 2023 | Nov 20, 2025 | Results |
| Oil and Grease | mg/L | 7 | 1 | Dec 20, 2023 | Nov 20, 2025 | Results |
| pH | SU | 7 | 0 | Dec 20, 2023 | Nov 20, 2025 | Results |
| Sulfate, Total (as SO4) | mg/L | 7 | 0 | Dec 20, 2023 | Nov 20, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 7 | 0 | Dec 20, 2023 | Nov 20, 2025 | Results |
| Boron, Total Recoverable | ug/L | 4 | 3 | Nov 26, 2024 | Nov 20, 2025 | Results |
| Total Dissolved Solids (TDS) | mg/L | 3 | 0 | Nov 20, 2025 | Nov 20, 2025 | Results |
All results (70 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Nov 20, 2025 | Boron, Total | ND | ug/L | Effluent | Qualifying Storm Event | E200.7 | 1360908 | |
| Nov 20, 2025 | Boron, Total | ND 0 | ug/L | Effluent | Qualifying Storm Event | E200.7 | 1360908 | |
| Nov 20, 2025 | Boron, Total | ND 0 | ug/L | Effluent | Qualifying Storm Event | E200.7 | 1360908 | |
| Nov 20, 2025 | Boron, Total Recoverable | ND | ug/L | Effluent | Qualifying Storm Event | 1360908 | ||
| Nov 20, 2025 | Boron, Total Recoverable | ND 0 | ug/L | Effluent | Qualifying Storm Event | 1360908 | ||
| Nov 20, 2025 | Boron, Total Recoverable | ND 0 | ug/L | Effluent | Qualifying Storm Event | 1360908 | ||
| Nov 20, 2025 | Chloride | 2.8 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1360908 | |
| Nov 20, 2025 | Chloride | 2.8 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1360908 | |
| Nov 20, 2025 | Chloride | 2.8 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1360908 | |
| Nov 20, 2025 | Copper, Total | .007 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1360908 | |
| Nov 20, 2025 | Copper, Total | .007 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1360908 | |
| Nov 20, 2025 | Copper, Total | .0125 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1360908 | |
| Nov 20, 2025 | Mercury, Total | ND 0 | ug/L | Effluent | Qualifying Storm Event | E245.1 | 1360908 | |
| Nov 20, 2025 | Mercury, Total | ND 0 | ug/L | Effluent | Qualifying Storm Event | E245.1 | 1360908 | |
| Nov 20, 2025 | Mercury, Total | .0001 | ug/L | Effluent | Qualifying Storm Event | E245.1 | 1360908 | |
| Nov 20, 2025 | Nickel, Total | .003 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1360908 | |
| Nov 20, 2025 | Nickel, Total | .003 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1360908 | |
| Nov 20, 2025 | Nickel, Total | .003 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1360908 | |
| Nov 20, 2025 | Oil and Grease | 6.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1360908 | |
| Nov 20, 2025 | Oil and Grease | 5.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1360908 | |
| Nov 20, 2025 | Oil and Grease | 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1360908 | |
| Nov 20, 2025 | pH | 6.4 | SU | Effluent | Qualifying Storm Event | A4500HB | 1360908 | |
| Nov 20, 2025 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | A4500HB | 1360908 | |
| Nov 20, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1360908 | |
| Nov 20, 2025 | Sulfate, Total (as SO4) | 1.2 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1360908 | |
| Nov 20, 2025 | Sulfate, Total (as SO4) | 4.2 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1360908 | |
| Nov 20, 2025 | Sulfate, Total (as SO4) | 4.5 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1360908 | |
| Nov 20, 2025 | Total Dissolved Solids (TDS) | 16 | mg/L | Effluent | Qualifying Storm Event | A2540C | 1360908 | |
| Nov 20, 2025 | Total Dissolved Solids (TDS) | 33 | mg/L | Effluent | Qualifying Storm Event | A2540C | 1360908 | |
| Nov 20, 2025 | Total Dissolved Solids (TDS) | 33 | mg/L | Effluent | Qualifying Storm Event | A2540C | 1360908 | |
| Nov 20, 2025 | Total Suspended Solids (TSS) | 24 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1360908 | |
| Nov 20, 2025 | Total Suspended Solids (TSS) | 24 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1360908 | |
| Nov 20, 2025 | Total Suspended Solids (TSS) | 19 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1360908 | |
| Nov 26, 2024 | Boron, Total | .074 | ug/L | Effluent | Qualifying Storm Event | 1321941 | ||
| Nov 26, 2024 | Boron, Total Recoverable | .074 | ug/L | Effluent | Qualifying Storm Event | 1321941 | ||
| Nov 26, 2024 | Chloride | 6.1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1321941 | |
| Nov 26, 2024 | Copper, Total | .117 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1321941 | |
| Nov 26, 2024 | Mercury, Total | ND | ug/L | Effluent | Qualifying Storm Event | E245.1 | 1321941 | |
| Nov 26, 2024 | Nickel, Total | .026 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1321941 | |
| Nov 26, 2024 | Oil and Grease | 5.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1321941 | |
| Nov 26, 2024 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | A4500HB | 1321941 | |
| Nov 26, 2024 | Sulfate, Total (as SO4) | 11 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1321941 | |
| Nov 26, 2024 | Total Suspended Solids (TSS) | 169 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1321941 | |
| Dec 20, 2023 | Boron, Total | 26 | ug/L | Effluent | Qualifying Storm Event | 1270749 | ||
| Dec 20, 2023 | Boron, Total | 22 | ug/L | Effluent | Qualifying Storm Event | 1270749 | ||
| Dec 20, 2023 | Boron, Total | 28 | ug/L | Effluent | Qualifying Storm Event | 1270749 | ||
| Dec 20, 2023 | Chloride | 1.7 | mg/L | Effluent | Qualifying Storm Event | 1270749 | ||
| Dec 20, 2023 | Chloride | .93 | mg/L | Effluent | Qualifying Storm Event | 1270749 | ||
| Dec 20, 2023 | Chloride | 1.96 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1270749 | |
| Dec 20, 2023 | Copper, Total | .021 | mg/L | Effluent | Qualifying Storm Event | 1270749 |
Results are shown exactly as reported by the discharger. Identical rows repeated in the State's export are shown once. Where the export contains different versions of the same sample and parameter, each version is listed and flagged. Details.
Compliance and enforcement records Evidence: SMARTS record
These are records as the State Water Board publishes them in SMARTS, with the source's own types and statuses. They are not a compliance determination or rating. A record listed here is not proof of a violation beyond what the source states, and the absence of records does not establish compliance.
| Record type | Records | As published | Dates | Retrieved | List |
|---|---|---|---|---|---|
| Violations | 1 | 1 Violation · 0 Potential (preliminary) · 0 Dismissed | Sep 21, 2026 – Sep 21, 2026 | Oct 21, 2026 | All violations |
| Enforcement actions | 1 | 1 issued · 0 draft · 0 withdrawn, rescinded or superseded | Sep 21, 2026 – Sep 21, 2026 | Oct 21, 2026 | All actions |
| Inspections | 0 | inspections, not findings | — | Oct 21, 2026 | |
| Annual reports | 4 | certified reports (contents not shown) | 2022 – 2025 | Oct 21, 2026 | All reports |
| Water-quality-based corrective action reports | 0 | reports, by parameter | — | Oct 21, 2026 |
Each record type is counted by its own SMARTS identifier. A violation and the enforcement action that cites it are two records in two lists; they are never added together.
Chronological record history (6 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Sep 21, 2026 | Enforcement actions | 473371 | EPL (Expedited Payment Letter) | Active | R4-2026-0268 |
| Sep 21, 2026 | Violations | 907310 | Late Report | Violation | Report |
| Jun 16, 2026 | Annual reports | 1341235 | Annual report 2025 | — | |
| Feb 25, 2025 | Annual reports | 1300432 | Annual report 2024 | — | |
| Jul 11, 2024 | Annual reports | 1249811 | Annual report 2023 | — | |
| Jul 18, 2023 | Annual reports | 1225670 | Annual report 2022 | — |
Sources and provenance
| Information | Source | Retrieved or published |
|---|---|---|
| Permit, location, receiving-water text | SMARTS Industrial Application Specific Data | Oct 20, 2026 |
| Permit history | SMARTS Storm Water Applications | Oct 20, 2026 |
| Monitoring results | SMARTS Industrial Parameter Data | Oct 20, 2026 |
| Watershed Boundary Dataset HU2 GeoPackages 15, 16, 18 (WBDHU12) | USGS | 2026-10-22 |
| 2026 California Integrated Report, Appendix A: 2026 303(d) List (final) | SWRCB | 2026-10-22 |
| Final_2026_Rivers_and_Streams + Final_2026_Lakes_and_Reservoirs (FeatureServer 0) | SWRCB GIS | 2026-10-22 |
| SMARTS TMDL requirements | SMARTS | 2026-10-21 |
Relationships computed 2026-10-22 with methods facility_huc12/1, proximity/1, receiving_water/2, tmdl_reference/1, waterbody_huc12_ovl/1, waterbody_huc12_pub/1; proximity threshold 1.0 km.
How to read the evidence labels
- Evidence: SMARTS record Evidence: facility-reported Information as published in SMARTS or reported by the discharger.
- Evidence: identification corroborated The reported receiving-water name identifies one official waterbody and the facility's location is consistent with it. It does not establish a discharge pathway.
- Evidence: candidate, awaiting review Evidence: not confirmed The reported name could match one or more official waterbodies, but no identification has been confirmed; nothing is assigned without review.
- Evidence: spatial Evidence: geographic proximity Derived from the reported location only.
- Evidence: SMARTS-reported Source records whose links to official references are not yet reviewed.
- Evidence: unavailable The information could not be loaded or is not in the sources.
Records are shown as published and are not compliance determinations. How geographic context is derived.