West Coast Aerospace Inc
Active WDID 4 19I023808 Rancho Dominguez, Los Angeles 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
- Rancho Dominguez, 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
- 2 waterbodies; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 70 distinct results, 7 reporting years (2015 to 2023)
- Most recent sample Feb 01, 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
- 33.869883, -118.209188
- Precision
- 6 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
- 3017 E Las Hermanas, Rancho Dominguez 90221
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Compton Creek-Los Angeles River HUC12 180701050402
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
- West Coast Aerospace Inc
- Primary industry (SIC)
- 3451-Screw Machine Products
- Secondary SIC
- 3452-Bolts, Nuts, Screws, Rivets, and Washers
- Application ID
- 430953
- NOI processed
- Sep 07, 2012
- Last certified
- Sep 28, 2017
- Facility size
- 57000 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 430953 | Industrial | Active | Sep 07, 2012 | — | Sep 28, 2017 |
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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Compton Creek CAR4051501019990202111430 | 569 m | listed | 8 |
| Compton Creek, unnamed tributary at Santa Fe Rd CAR4051501020110225144256 | 626 m | not listed | 0 |
Waterbodies within 1.0 km of the reported facility location. Method proximity/1.
SMARTS TMDL records Evidence: SMARTS-reported
SMARTS TMDL record as reported for this facility; it is not a determination that the TMDL applies to the facility.
| TMDL | Waterbody (as reported) | Parameter | Limit | Type | Period | Due | Discharges to TMDL water |
|---|---|---|---|---|---|---|---|
| Los Angeles River Metals TMDL | Los Angeles River and Los Angeles River Tributaries | Zinc, Total | .159 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
1 record. Links between these records and specific TMDL projects or listed waterbodies have not been reviewed and are not shown.
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 7 parameters, most recent sample Feb 01, 2024.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2023 | 7 | 7 | 0 | Feb 01, 2024 | Feb 01, 2024 |
| 2021 | 7 | 7 | 0 | Mar 28, 2022 | Mar 28, 2022 |
| 2020 | 14 | 7 | 0 | Mar 03, 2021 | Mar 15, 2021 |
| 2019 | 7 | 7 | 0 | Mar 13, 2020 | Mar 13, 2020 |
| 2018 | 21 | 7 | 0 | Dec 03, 2018 | Jan 17, 2019 |
| 2016 | 7 | 7 | 0 | Feb 07, 2017 | Feb 07, 2017 |
| 2015 | 7 | 7 | 0 | Mar 07, 2016 | Mar 07, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Aluminum, Total | mg/L | 10 | 0 | Mar 07, 2016 | Feb 01, 2024 | Results |
| Iron, Total | mg/L | 10 | 2 | Mar 07, 2016 | Feb 01, 2024 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 10 | 2 | Mar 07, 2016 | Feb 01, 2024 | Results |
| Oil and Grease | mg/L | 10 | 10 | Mar 07, 2016 | Feb 01, 2024 | Results |
| pH | SU | 10 | 0 | Mar 07, 2016 | Feb 01, 2024 | Results |
| Total Suspended Solids (TSS) | mg/L | 10 | 3 | Mar 07, 2016 | Feb 01, 2024 | Results |
| Zinc, Total | mg/L | 10 | 0 | Mar 07, 2016 | Feb 01, 2024 | Results |
All results (70 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 01, 2024 | Aluminum, Total | .0593 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1288090 | |
| Feb 01, 2024 | Iron, Total | .09 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1288090 | |
| Feb 01, 2024 | Nitrite Plus Nitrate (as N) | < .05 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1288090 | |
| Feb 01, 2024 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1288090 | |
| Feb 01, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1288090 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1288090 | |
| Feb 01, 2024 | Zinc, Total | .0827 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1288090 | |
| Mar 28, 2022 | Aluminum, Total | .14 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1180563 | |
| Mar 28, 2022 | Iron, Total | .23 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1180563 | |
| Mar 28, 2022 | Nitrite Plus Nitrate (as N) | .08 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1180563 | |
| Mar 28, 2022 | Oil and Grease | < 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1180563 | |
| Mar 28, 2022 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | A4500HB | 1180563 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | 39 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1180563 | |
| Mar 28, 2022 | Zinc, Total | .2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1180563 | |
| Mar 15, 2021 | Aluminum, Total | .13 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1148730 | |
| Mar 15, 2021 | Iron, Total | .13 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1148730 | |
| Mar 15, 2021 | Nitrite Plus Nitrate (as N) | .07 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1148730 | |
| Mar 15, 2021 | Oil and Grease | < 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1148730 | |
| Mar 15, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | A4500HB | 1148730 | |
| Mar 15, 2021 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1148730 | |
| Mar 15, 2021 | Zinc, Total | .16 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1148730 | |
| Mar 03, 2021 | Aluminum, Total | .55 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1148729 | |
| Mar 03, 2021 | Iron, Total | .76 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1148729 | |
| Mar 03, 2021 | Nitrite Plus Nitrate (as N) | .06 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1148729 | |
| Mar 03, 2021 | Oil and Grease | < 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1148729 | |
| Mar 03, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | A4500HB | 1148729 | |
| Mar 03, 2021 | Total Suspended Solids (TSS) | 26 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1148729 | |
| Mar 03, 2021 | Zinc, Total | .17 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1148729 | |
| Mar 13, 2020 | Aluminum, Total | .025 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1106801 | |
| Mar 13, 2020 | Iron, Total | .03 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1106801 | |
| Mar 13, 2020 | Nitrite Plus Nitrate (as N) | .12 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1106801 | |
| Mar 13, 2020 | Oil and Grease | < 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1106801 | |
| Mar 13, 2020 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1106801 | |
| Mar 13, 2020 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1106801 | |
| Mar 13, 2020 | Zinc, Total | .13 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1106801 | |
| Jan 17, 2019 | Aluminum, Total | .0069 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1039979 | |
| Jan 17, 2019 | Iron, Total | .02 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1039979 | |
| Jan 17, 2019 | Nitrite Plus Nitrate (as N) | .05 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1039979 | |
| Jan 17, 2019 | Oil and Grease | < 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1039979 | |
| Jan 17, 2019 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1039979 | |
| Jan 17, 2019 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1039979 | |
| Jan 17, 2019 | Zinc, Total | .12 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1039979 | |
| Dec 07, 2018 | Aluminum, Total | .022 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1032650 | |
| Dec 07, 2018 | Iron, Total | .03 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1032650 | |
| Dec 07, 2018 | Nitrite Plus Nitrate (as N) | .07 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1032650 | |
| Dec 07, 2018 | Oil and Grease | < 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1032650 | |
| Dec 07, 2018 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | A4500HB | 1032650 | |
| Dec 07, 2018 | Total Suspended Solids (TSS) | < 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1032650 | |
| Dec 07, 2018 | Zinc, Total | .11 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1032650 | |
| Dec 03, 2018 | Aluminum, Total | .059 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1032650 |
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 | May 19, 2026 – May 19, 2026 | Oct 21, 2026 | All violations |
| Enforcement actions | 1 | 1 issued · 0 draft · 0 withdrawn, rescinded or superseded | May 19, 2026 – May 19, 2026 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Oct 09, 2013 – Oct 09, 2013 | 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 | 1 | reports, by parameter | 2020-21 – 2020-21 | Oct 21, 2026 | All reports |
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 (15 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 14, 2026 | Annual reports | 1338007 | Annual report 2025 | — | |
| May 19, 2026 | Enforcement actions | 469916 | EPL (Expedited Payment Letter) | Historical | R4-2026-0042 |
| May 19, 2026 | Violations | 903991 | Late Report | Violation | Report |
| Jul 15, 2025 | Annual reports | 1296965 | Annual report 2024 | — | |
| Jul 08, 2024 | Annual reports | 1246188 | Annual report 2023 | — | |
| Jul 05, 2023 | Annual reports | 1192325 | Annual report 2022 | — | |
| Aug 30, 2022 | Water-quality-based corrective action reports | 1203254 | WQBCAR 2020-21 | — | Zinc, Total |
| Jul 01, 2022 | Annual reports | 1115994 | Annual report 2021 | — | |
| Jul 02, 2021 | Annual reports | 1064126 | Annual report 2020 | — | |
| Jul 14, 2020 | Annual reports | 981084 | Annual report 2019 | — | |
| Jun 20, 2019 | Annual reports | 957371 | Annual report 2018 | — | |
| Jul 11, 2018 | Annual reports | 942808 | Annual report 2017 | — | |
| Jul 03, 2017 | Annual reports | 882309 | Annual report 2016 | — | |
| Jul 29, 2016 | Annual reports | 843902 | Annual report 2015 | — | |
| Oct 09, 2013 | Inspections | 2019994 | B Type compliance | — | No Further Action |
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.