Silicon Microstructures Inc
Terminated WDID 2 43I017419 Milpitas, Santa Clara County Region 2 · San Francisco Bay
At a glance
- Permit Evidence: SMARTS record
- Terminated Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Milpitas, Santa Clara County
- Region 2 · San Francisco Bay · Location · Statewide map
- Receiving water
- Coyote Creek (as reported by the facility)
- Evidence: candidate, awaiting review Details
- 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
- 2 waterbodies; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 90 distinct results, 6 reporting years (2015 to 2020)
- Most recent sample Mar 18, 2021 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 3 violation records · 5 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
- 37.40365, -121.9159
- Precision
- 4 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
- 1701 Mccarthy Blvd, Milpitas 95035
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- Lower Penitencia Creek-Frontal San Francisco Bay Estuaries HUC12 180500030204
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
- Terminated
- Operator
- Silicon Microstructures Inc
- Primary industry (SIC)
- 3674-Semiconductors and Related Devices
- Application ID
- 184294
- NOI processed
- Aug 13, 2002
- Termination effective
- Aug 05, 2021
- Last certified
- Jun 17, 2021
- Facility size
- 2 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 184294 | Industrial | Terminated | Aug 13, 2002 | Aug 05, 2021 | Jun 17, 2021 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Coyote Creek
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: not confirmed Evidence: candidate, awaiting review Awaiting review
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
Why it is not confirmed (3)
- C2 candidate in another or unknown Regional Board
- C3 facility HUC12 not corroborated (complete published list)
- C4 candidate more than 5 km away
1 official waterbody shares this name; none is assigned without review.
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 |
|---|---|---|---|
| Coyote Creek (Santa Clara Co.) CAR2053002119990218112824 | 172 m | listed | 9 |
| Lower Penitencia Creek (Santa Clara) CAR2053008020210406043684 | 895 m | not listed | 0 |
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.
90 distinct measurements across 3 parameters, most recent sample Mar 18, 2021.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2020 | 12 | 3 | 0 | Jan 28, 2021 | Mar 18, 2021 |
| 2019 | 6 | 3 | 0 | Jan 16, 2020 | Jan 16, 2020 |
| 2018 | 12 | 3 | 0 | Feb 14, 2019 | Mar 27, 2019 |
| 2017 | 30 | 3 | 0 | Nov 16, 2017 | Apr 12, 2018 |
| 2016 | 24 | 3 | 0 | Oct 16, 2016 | Feb 21, 2017 |
| 2015 | 6 | 3 | 0 | Jan 06, 2016 | Jan 06, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 30 | 22 | Jan 06, 2016 | Mar 18, 2021 | Results |
| pH | SU | 30 | 0 | Jan 06, 2016 | Mar 18, 2021 | Results |
| Total Suspended Solids (TSS) | mg/L | 30 | 0 | Jan 06, 2016 | Mar 18, 2021 | Results |
All results (90 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Mar 18, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1151574 | |
| Mar 18, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1151574 | |
| Mar 18, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1151574 | |
| Mar 18, 2021 | pH | 5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1151574 | |
| Mar 18, 2021 | Total Suspended Solids (TSS) | 31 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1151574 | |
| Mar 18, 2021 | Total Suspended Solids (TSS) | 55 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1151574 | |
| Jan 28, 2021 | Oil and Grease | DNQ 2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1151573 | |
| Jan 28, 2021 | Oil and Grease | ND 1.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1151573 | |
| Jan 28, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1151573 | |
| Jan 28, 2021 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1151573 | |
| Jan 28, 2021 | Total Suspended Solids (TSS) | 6.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1151573 | |
| Jan 28, 2021 | Total Suspended Solids (TSS) | 11 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1151573 | |
| Jan 16, 2020 | Oil and Grease | 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1120987 | |
| Jan 16, 2020 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1120987 | |
| Jan 16, 2020 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1120987 | |
| Jan 16, 2020 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1120987 | |
| Jan 16, 2020 | Total Suspended Solids (TSS) | 35 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1120987 | |
| Jan 16, 2020 | Total Suspended Solids (TSS) | 35 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1120987 | |
| Mar 27, 2019 | Oil and Grease | 2.5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1062830 | |
| Mar 27, 2019 | Oil and Grease | 2.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1062830 | |
| Mar 27, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1062830 | |
| Mar 27, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1062830 | |
| Mar 27, 2019 | Total Suspended Solids (TSS) | 19 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1062830 | |
| Mar 27, 2019 | Total Suspended Solids (TSS) | 35 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1062830 | |
| Feb 14, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 1062811 | |
| Feb 14, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 1062811 | |
| Feb 14, 2019 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1062811 | |
| Feb 14, 2019 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1062811 | |
| Feb 14, 2019 | Total Suspended Solids (TSS) | 13 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1062811 | |
| Feb 14, 2019 | Total Suspended Solids (TSS) | 25 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1062811 | |
| Apr 12, 2018 | Oil and Grease | 1.9 | mg/L | Effluent | Qualifying Storm Event | A5220B | 990507 | |
| Apr 12, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 990507 | |
| Apr 12, 2018 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 990507 | |
| Apr 12, 2018 | pH | 6 | SU | Effluent | Qualifying Storm Event | A4500HB | 990507 | |
| Apr 12, 2018 | Total Suspended Solids (TSS) | 58 | mg/L | Effluent | Qualifying Storm Event | A2540D | 990507 | |
| Apr 12, 2018 | Total Suspended Solids (TSS) | 45 | mg/L | Effluent | Qualifying Storm Event | A2540D | 990507 | |
| Mar 01, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 990507 | |
| Mar 01, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 990507 | |
| Mar 01, 2018 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 990507 | |
| Mar 01, 2018 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 990507 | |
| Mar 01, 2018 | Total Suspended Solids (TSS) | 24 | mg/L | Effluent | Qualifying Storm Event | A2540D | 990507 | |
| Mar 01, 2018 | Total Suspended Solids (TSS) | 27 | mg/L | Effluent | Qualifying Storm Event | A2540D | 990507 | |
| Jan 08, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 990507 | |
| Jan 08, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 990507 | |
| Jan 08, 2018 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 990507 | |
| Jan 08, 2018 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 990507 | |
| Jan 08, 2018 | Total Suspended Solids (TSS) | 30 | mg/L | Effluent | Qualifying Storm Event | A2540D | 990507 | |
| Jan 08, 2018 | Total Suspended Solids (TSS) | 28 | mg/L | Effluent | Qualifying Storm Event | A2540D | 990507 | |
| Nov 17, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 990507 | |
| Nov 17, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 990507 |
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 | 3 | 3 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 02, 2010 – Aug 15, 2015 | Oct 21, 2026 | All violations |
| Enforcement actions | 5 | 5 issued · 0 draft · 0 withdrawn, rescinded or superseded | Sep 30, 2010 – Dec 11, 2015 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Sep 12, 2011 – Sep 12, 2011 | Oct 21, 2026 | All inspections |
| Annual reports | 7 | certified reports (contents not shown) | 2015 – 2021 | 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 (16 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Aug 05, 2021 | Annual reports | 1110935 | Annual report 2021 | — | |
| Jul 02, 2021 | Annual reports | 1066861 | Annual report 2020 | — | |
| Jul 11, 2020 | Annual reports | 984006 | Annual report 2019 | — | |
| Jul 15, 2019 | Annual reports | 951499 | Annual report 2018 | — | |
| Jul 11, 2018 | Annual reports | 936905 | Annual report 2017 | — | |
| Jun 28, 2017 | Annual reports | 876045 | Annual report 2016 | — | |
| Dec 13, 2016 | Annual reports | 846118 | Annual report 2015 | — | |
| Dec 11, 2015 | Enforcement actions | 421992 | NNC (Notice of Non-Compliance) | Active | |
| Oct 30, 2015 | Enforcement actions | 421099 | NNC (Notice of Non-Compliance) | Active | |
| Aug 15, 2015 | Violations | 858778 | Failure to Obtain Permit | Violation | Report |
| Jan 30, 2014 | Enforcement actions | 415111 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 02, 2013 | Violations | 854269 | Late Report | Violation | Report |
| Sep 12, 2011 | Inspections | 2012845 | B Type compliance | — | No Further Action |
| Sep 30, 2010 | Enforcement actions | 402978 | NOV (Notice of Violation) | Active | |
| Sep 30, 2010 | Enforcement actions | 402979 | EPL (Expedited Payment Letter) | Historical | R2-2011-0110 |
| Jul 02, 2010 | Violations | 842726 | Late Report | Violation | Report |
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.