Sumitomo Electric Interconnect
Active WDID 9 37I016251 San Marcos, San Diego County Region 9 · San Diego
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- San Marcos, San Diego County
- Region 9 · San Diego · 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
- None
- Monitoring results Evidence: facility-reported
- 948 distinct results, 9 reporting years (2016 to 2025)
- Most recent sample Nov 14, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 0 violation records · 0 enforcement actions
- 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
- 33.14515, -117.18506
- Precision
- 5 decimal places
- Shared point
- No
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 915 Armorlite Dr, San Marcos 92069
- Regional Water Board
- 9 — San Diego
HUC12 watershed Evidence: spatial
- San Marcos Creek HUC12 180703030503
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
- Sumitomo Electric Interconnect
- Primary industry (SIC)
- 3087-Custom Compounding of Purchased Plastics Resins
- Application ID
- 218771
- NOI processed
- Nov 28, 2000
- Last certified
- Nov 02, 2023
- Facility size
- 84525 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 218771 | Industrial | Active | Nov 28, 2000 | — | Nov 02, 2023 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- None
- Discharges directly / indirectly
- N / N (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.
No 2026 Integrated Report waterbody lies within the proximity threshold of the reported location.
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.
948 distinct measurements across 11 parameters, most recent sample Nov 14, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 12 | 4 | 0 | Nov 14, 2025 | Nov 14, 2025 |
| 2023 | 36 | 4 | 0 | Dec 28, 2023 | Feb 01, 2024 |
| 2022 | 81 | 9 | 0 | Nov 08, 2022 | Mar 29, 2023 |
| 2021 | 99 | 10 | 0 | Oct 08, 2021 | Mar 28, 2022 |
| 2020 | 120 | 10 | 0 | Dec 28, 2020 | Mar 15, 2021 |
| 2019 | 160 | 10 | 0 | Nov 19, 2019 | Mar 10, 2020 |
| 2018 | 176 | 11 | 0 | Nov 29, 2018 | Jan 31, 2019 |
| 2017 | 88 | 11 | 0 | Feb 27, 2018 | Mar 15, 2018 |
| 2016 | 176 | 11 | 0 | Sep 20, 2016 | Feb 06, 2017 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 99 | 81 | Sep 20, 2016 | Nov 14, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 99 | 9 | Sep 20, 2016 | Nov 14, 2025 | Results |
| Zinc, Dissolved | mg/L | 99 | 0 | Sep 20, 2016 | Nov 14, 2025 | Results |
| pH | SU | 98 | 0 | Sep 20, 2016 | Nov 14, 2025 | Results |
| Cadmium, Dissolved | mg/L | 87 | 64 | Sep 20, 2016 | Mar 29, 2023 | Results |
| Copper, Dissolved | mg/L | 87 | 26 | Sep 20, 2016 | Mar 29, 2023 | Results |
| Lead, Dissolved | mg/L | 87 | 60 | Sep 20, 2016 | Mar 29, 2023 | Results |
| Nickel, Dissolved | mg/L | 87 | 42 | Sep 20, 2016 | Mar 29, 2023 | Results |
| Silver, Dissolved | mg/L | 87 | 87 | Sep 20, 2016 | Mar 29, 2023 | Results |
| Chromium, Dissolved | mg/L | 78 | 52 | Sep 20, 2016 | Mar 28, 2022 | Results |
| Total Organic Carbon (TOC) | mg/L | 40 | 0 | Sep 20, 2016 | Jan 31, 2019 | Results |
All results (948 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Nov 14, 2025 | Oil and Grease | 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1371395 | |
| Nov 14, 2025 | Oil and Grease | 4.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1371395 | |
| Nov 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1371395 | |
| Nov 14, 2025 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | A4500HB | 1371395 | |
| Nov 14, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1371395 | |
| Nov 14, 2025 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | A4500HB | 1371395 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1371395 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 12 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1371395 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1371395 | |
| Nov 14, 2025 | Zinc, Dissolved | .28 | mg/L | Effluent | Qualifying Storm Event | 1371395 | ||
| Nov 14, 2025 | Zinc, Dissolved | .26 | mg/L | Effluent | Qualifying Storm Event | 1371395 | ||
| Nov 14, 2025 | Zinc, Dissolved | .031 | mg/L | Effluent | Qualifying Storm Event | 1371395 | ||
| Feb 01, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287358 | |
| Feb 01, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287358 | |
| Feb 01, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287358 | |
| Feb 01, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287358 | |
| Feb 01, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287358 | |
| Feb 01, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287358 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 12 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287358 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 11 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287358 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 19 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287358 | |
| Feb 01, 2024 | Zinc, Dissolved | .075 | mg/L | Effluent | Qualifying Storm Event | 1287358 | ||
| Feb 01, 2024 | Zinc, Dissolved | .045 | mg/L | Effluent | Qualifying Storm Event | 1287358 | ||
| Feb 01, 2024 | Zinc, Dissolved | .094 | mg/L | Effluent | Qualifying Storm Event | 1287358 | ||
| Jan 19, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287234 | |
| Jan 19, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287234 | |
| Jan 19, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287234 | |
| Jan 19, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287234 | |
| Jan 19, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287234 | |
| Jan 19, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287234 | |
| Jan 19, 2024 | Total Suspended Solids (TSS) | 3.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287234 | |
| Jan 19, 2024 | Total Suspended Solids (TSS) | 1.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287234 | |
| Jan 19, 2024 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287234 | |
| Jan 19, 2024 | Zinc, Dissolved | .134 | mg/L | Effluent | Qualifying Storm Event | 1287234 | ||
| Jan 19, 2024 | Zinc, Dissolved | .07 | mg/L | Effluent | Qualifying Storm Event | 1287234 | ||
| Jan 19, 2024 | Zinc, Dissolved | .11 | mg/L | Effluent | Qualifying Storm Event | 1287234 | ||
| Dec 28, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287232 | |
| Dec 28, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287232 | |
| Dec 28, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287232 | |
| Dec 28, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287232 | |
| Dec 28, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287232 | |
| Dec 28, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287232 | |
| Dec 28, 2023 | Total Suspended Solids (TSS) | 8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287232 | |
| Dec 28, 2023 | Total Suspended Solids (TSS) | 38 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287232 | |
| Dec 28, 2023 | Total Suspended Solids (TSS) | 19 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287232 | |
| Dec 28, 2023 | Zinc, Dissolved | .061 | mg/L | Effluent | Qualifying Storm Event | 1287232 | ||
| Dec 28, 2023 | Zinc, Dissolved | .27 | mg/L | Effluent | Qualifying Storm Event | 1287232 | ||
| Dec 28, 2023 | Zinc, Dissolved | .063 | mg/L | Effluent | Qualifying Storm Event | 1287232 | ||
| Mar 29, 2023 | Cadmium, Dissolved | ND | mg/L | Effluent | Qualifying Storm Event | 1238779 | ||
| Mar 29, 2023 | Cadmium, Dissolved | ND | mg/L | Effluent | Qualifying Storm Event | 1238779 |
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 | 0 | 0 Violation · 0 Potential (preliminary) · 0 Dismissed | — | Oct 21, 2026 | |
| Enforcement actions | 0 | 0 issued · 0 draft · 0 withdrawn, rescinded or superseded | — | Oct 21, 2026 | |
| Inspections | 1 | inspections, not findings | Jun 14, 2001 – Jun 14, 2001 | Oct 21, 2026 | All inspections |
| Annual reports | 11 | certified reports (contents not shown) | 2015 – 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 (12 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 01, 2026 | Annual reports | 1335945 | Annual report 2025 | — | |
| Jul 08, 2025 | Annual reports | 1294782 | Annual report 2024 | — | |
| Jul 22, 2024 | Annual reports | 1243896 | Annual report 2023 | — | |
| Jul 10, 2023 | Annual reports | 1189927 | Annual report 2022 | — | |
| Jul 11, 2022 | Annual reports | 1113350 | Annual report 2021 | — | |
| Jul 12, 2021 | Annual reports | 1069390 | Annual report 2020 | — | |
| Jul 01, 2020 | Annual reports | 986704 | Annual report 2019 | — | |
| Jul 23, 2019 | Annual reports | 954286 | Annual report 2018 | — | |
| Jul 12, 2018 | Annual reports | 939704 | Annual report 2017 | — | |
| Jul 14, 2017 | Annual reports | 878988 | Annual report 2016 | — | |
| Jul 14, 2016 | Annual reports | 838917 | Annual report 2015 | — | |
| Jun 14, 2001 | Inspections | 313768 | B Type compliance | — |
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.