Emcore
Terminated WDID 4 19I025688 Alhambra, Los Angeles County Region 4 · Los Angeles
At a glance
- Permit Evidence: SMARTS record
- Terminated Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Alhambra, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Los Angeles River (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
- None
- Monitoring results Evidence: facility-reported
- 222 distinct results, 8 reporting years (2015 to 2023)
- Most recent sample Jan 22, 2024 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 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
- 34.08211, -118.14573
- Precision
- 5 decimal places
- Shared point
- 3 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
- 2015 Chestnut St, Alhambra 91803
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Chavez Ravine-Los Angeles River HUC12 180701050401
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
- Emcore
- Primary industry (SIC)
- 3674-Semiconductors and Related Devices
- Secondary SIC
- 3679-Electronic Components, NEC
- Application ID
- 456694
- NOI processed
- Jun 25, 2015
- Termination effective
- Sep 03, 2024
- Last certified
- Aug 07, 2024
- Facility size
- 2.94 Acres
- Impervious area
- 95 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 456694 | Industrial | Terminated | Jun 25, 2015 | Sep 03, 2024 | Aug 07, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Los Angeles River
- 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 (1)
- C1 name is only a prefix of official names
7 official waterbodies share 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.
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.
222 distinct measurements across 3 parameters, most recent sample Jan 22, 2024.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2023 | 18 | 3 | 0 | Jan 03, 2024 | Jan 22, 2024 |
| 2022 | 24 | 3 | 0 | Nov 07, 2022 | Jan 10, 2023 |
| 2020 | 9 | 3 | 0 | Mar 10, 2021 | Mar 10, 2021 |
| 2019 | 36 | 3 | 0 | Nov 20, 2019 | Apr 07, 2020 |
| 2018 | 36 | 3 | 0 | Nov 29, 2018 | Jan 31, 2019 |
| 2017 | 18 | 3 | 0 | Jan 09, 2018 | Mar 02, 2018 |
| 2016 | 36 | 3 | 0 | Nov 21, 2016 | Jan 20, 2017 |
| 2015 | 45 | 3 | 0 | Sep 15, 2015 | Apr 08, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 75 | 29 | Sep 15, 2015 | Jan 22, 2024 | Results |
| Total Suspended Solids (TSS) | mg/L | 75 | 4 | Sep 15, 2015 | Jan 22, 2024 | Results |
| pH | SU | 72 | 0 | Sep 15, 2015 | Jan 22, 2024 | Results |
All results (222 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Jan 22, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1275327 | |
| Jan 22, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1275327 | |
| Jan 22, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1275327 | |
| Jan 22, 2024 | pH | 6.94 | SU | Effluent | Qualifying Storm Event | pH_Field | 1275327 | |
| Jan 22, 2024 | pH | 7.12 | SU | Effluent | Qualifying Storm Event | pH_Field | 1275327 | |
| Jan 22, 2024 | pH | 6.96 | SU | Effluent | Qualifying Storm Event | pH_Field | 1275327 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 12 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1275327 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 7.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1275327 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1275327 | |
| Jan 03, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1274410 | |
| Jan 03, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1274410 | |
| Jan 03, 2024 | Oil and Grease | DNQ 2.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1274410 | |
| Jan 03, 2024 | pH | 7.32 | SU | Effluent | Qualifying Storm Event | pH_Field | 1274410 | |
| Jan 03, 2024 | pH | 6.91 | SU | Effluent | Qualifying Storm Event | pH_Field | 1274410 | |
| Jan 03, 2024 | pH | 6.97 | SU | Effluent | Qualifying Storm Event | pH_Field | 1274410 | |
| Jan 03, 2024 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1274410 | |
| Jan 03, 2024 | Total Suspended Solids (TSS) | 4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1274410 | |
| Jan 03, 2024 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1274410 | |
| Jan 10, 2023 | Oil and Grease | 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1226488 | |
| Jan 10, 2023 | Oil and Grease | 10 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1226488 | |
| Jan 10, 2023 | Oil and Grease | 2.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1226488 | |
| Jan 10, 2023 | pH | 8.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1226488 | |
| Jan 10, 2023 | pH | 8.62 | SU | Effluent | Qualifying Storm Event | pH_Field | 1226488 | |
| Jan 10, 2023 | pH | 8.23 | SU | Effluent | Qualifying Storm Event | pH_Field | 1226488 | |
| Jan 10, 2023 | Total Suspended Solids (TSS) | 2.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1226488 | |
| Jan 10, 2023 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1226488 | |
| Jan 10, 2023 | Total Suspended Solids (TSS) | 1.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1226488 | |
| Jan 05, 2023 | Oil and Grease | 3.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1226486 | |
| Jan 05, 2023 | Oil and Grease | 2.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1226486 | |
| Jan 05, 2023 | Oil and Grease | 2.6 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1226486 | |
| Jan 05, 2023 | Total Suspended Solids (TSS) | 3.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1226486 | |
| Jan 05, 2023 | Total Suspended Solids (TSS) | 6.1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1226486 | |
| Jan 05, 2023 | Total Suspended Solids (TSS) | 4.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1226486 | |
| Nov 07, 2022 | Oil and Grease | 2.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1216342 | |
| Nov 07, 2022 | Oil and Grease | 2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1216342 | |
| Nov 07, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1216342 | |
| Nov 07, 2022 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1216342 | |
| Nov 07, 2022 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1216342 | |
| Nov 07, 2022 | pH | 7.7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1216342 | |
| Nov 07, 2022 | Total Suspended Solids (TSS) | 56 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1216342 | |
| Nov 07, 2022 | Total Suspended Solids (TSS) | 20 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1216342 | |
| Nov 07, 2022 | Total Suspended Solids (TSS) | 35 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1216342 | |
| Mar 10, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1151736 | |
| Mar 10, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1151736 | |
| Mar 10, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1151736 | |
| Mar 10, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1151736 | |
| Mar 10, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1151736 | |
| Mar 10, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1151736 | |
| Mar 10, 2021 | Total Suspended Solids (TSS) | 14 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1151736 | |
| Mar 10, 2021 | Total Suspended Solids (TSS) | 32 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1151736 |
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 | Dec 06, 2023 – Dec 06, 2023 | Oct 21, 2026 | All violations |
| Enforcement actions | 1 | 1 issued · 0 draft · 0 withdrawn, rescinded or superseded | Dec 06, 2023 – Dec 06, 2023 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Apr 12, 2024 – Apr 12, 2024 | Oct 21, 2026 | All inspections |
| Annual reports | 9 | certified reports (contents not shown) | 2015 – 2023 | 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 |
|---|---|---|---|---|---|
| Jun 04, 2024 | Annual reports | 1247366 | Annual report 2023 | — | |
| Apr 12, 2024 | Inspections | 2064677 | B Type compliance | Finalized | No Further Action |
| Dec 06, 2023 | Enforcement actions | 451644 | NOV (Notice of Violation) | Historical | |
| Dec 06, 2023 | Violations | 886748 | Incomplete/Insufficient SWPPP | Violation | Report |
| Jun 29, 2023 | Annual reports | 1193563 | Annual report 2022 | — | |
| Jun 29, 2022 | Annual reports | 1117401 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1065618 | Annual report 2020 | — | |
| Jul 10, 2020 | Annual reports | 982725 | Annual report 2019 | — | |
| Jul 10, 2019 | Annual reports | 959076 | Annual report 2018 | — | |
| Jul 12, 2018 | Annual reports | 944513 | Annual report 2017 | — | |
| Jul 12, 2017 | Annual reports | 883915 | Annual report 2016 | — | |
| Jul 08, 2016 | Annual reports | 840185 | Annual report 2015 | — |
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.