Southwest Plating
Active WDID 4 19I003448 Los Angeles, 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
- Los Angeles, Los Angeles 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
- None
- Monitoring results Evidence: facility-reported
- 211 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Feb 16, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 2 inspections · 17 violation records · 16 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
- 33.98911, -118.29898
- 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
- 1344 Slauson 1344 W SLAUSON AVE, Los Angeles 90044
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Ballona Creek HUC12 180701040300
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
- Southwest Plating
- Primary industry (SIC)
- 3471-Electroplating, Plating, Polishing, Anodizing, and Coloring
- Application ID
- 189156
- NOI processed
- Apr 03, 1992
- Last certified
- Mar 14, 2017
- Facility size
- 12150 SqFt
- Impervious area
- 95 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 189156 | Industrial | Active | Apr 03, 1992 | — | Mar 14, 2017 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- —
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
No receiving-water text was reported for this permit.
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.
211 distinct measurements across 11 parameters, most recent sample Feb 16, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 33 | 11 | 0 | Oct 14, 2025 | Feb 16, 2026 |
| 2024 | 11 | 11 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2023 | 22 | 11 | 0 | Dec 22, 2023 | Feb 25, 2024 |
| 2022 | 10 | 10 | 0 | Nov 08, 2022 | Nov 08, 2022 |
| 2021 | 29 | 10 | 0 | Oct 25, 2021 | Mar 28, 2022 |
| 2020 | 10 | 10 | 0 | Dec 28, 2020 | Dec 28, 2020 |
| 2019 | 20 | 10 | 0 | Dec 04, 2019 | Mar 12, 2020 |
| 2018 | 40 | 10 | 0 | Nov 29, 2018 | Feb 14, 2019 |
| 2017 | 10 | 10 | 0 | Jan 18, 2018 | Jan 18, 2018 |
| 2016 | 12 | 10 | 0 | Dec 22, 2016 | Feb 17, 2017 |
| 2015 | 14 | 7 | 0 | Jan 05, 2016 | Mar 11, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Nitrite Plus Nitrate (as N) | mg/L | 23 | 6 | Jan 05, 2016 | Feb 16, 2026 | Results |
| Aluminum, Total | mg/L | 21 | 5 | Jan 05, 2016 | Feb 16, 2026 | Results |
| Oil and Grease | mg/L | 21 | 15 | Jan 05, 2016 | Feb 16, 2026 | Results |
| pH | SU | 21 | 0 | Jan 05, 2016 | Feb 16, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 21 | 11 | Jan 05, 2016 | Feb 16, 2026 | Results |
| Zinc, Total | mg/L | 21 | 7 | Jan 05, 2016 | Feb 16, 2026 | Results |
| Iron, Total | mg/L | 20 | 11 | Jan 05, 2016 | Feb 16, 2026 | Results |
| Cadmium, Total | mg/L | 19 | 0 | Dec 22, 2016 | Feb 16, 2026 | Results |
| Chromium (Total) | mg/L | 19 | 12 | Dec 22, 2016 | Feb 16, 2026 | Results |
| Cyanide, Total (as CN) | mg/L | 19 | 12 | Dec 22, 2016 | Feb 16, 2026 | Results |
| Copper, Total | mg/L | 6 | 3 | Dec 22, 2023 | Feb 16, 2026 | Results |
All results (211 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 16, 2026 | Aluminum, Total | < .0044 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377306 | |
| Feb 16, 2026 | Cadmium, Total | .001 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377306 | |
| Feb 16, 2026 | Chromium (Total) | .0003 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377306 | |
| Feb 16, 2026 | Copper, Total | < .0002 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377306 | |
| Feb 16, 2026 | Cyanide, Total (as CN) | .006 | mg/L | Effluent | Qualifying Storm Event | A4500CE | 1377306 | |
| Feb 16, 2026 | Iron, Total | < .0075 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1377306 | |
| Feb 16, 2026 | Nitrite Plus Nitrate (as N) | < .036 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1377306 | |
| Feb 16, 2026 | Oil and Grease | < 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1377306 | |
| Feb 16, 2026 | pH | 6.8 | SU | Effluent | Qualifying Storm Event | A4500HB | 1377306 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | < .2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1377306 | |
| Feb 16, 2026 | Zinc, Total | < .0017 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377306 | |
| Dec 24, 2025 | Aluminum, Total | < .0044 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377302 | |
| Dec 24, 2025 | Cadmium, Total | .0068 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377302 | |
| Dec 24, 2025 | Chromium (Total) | .0003 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377302 | |
| Dec 24, 2025 | Copper, Total | .013 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377302 | |
| Dec 24, 2025 | Cyanide, Total (as CN) | < .005 | mg/L | Effluent | Qualifying Storm Event | A4500CE | 1377302 | |
| Dec 24, 2025 | Iron, Total | < .0075 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1377302 | |
| Dec 24, 2025 | Nitrite Plus Nitrate (as N) | < .036 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1377302 | |
| Dec 24, 2025 | Oil and Grease | 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1377302 | |
| Dec 24, 2025 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | A4500HB | 1377302 | |
| Dec 24, 2025 | Total Suspended Solids (TSS) | 1.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1377302 | |
| Dec 24, 2025 | Zinc, Total | .014 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377302 | |
| Oct 14, 2025 | Aluminum, Total | .01 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377298 | |
| Oct 14, 2025 | Cadmium, Total | .0011 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377298 | |
| Oct 14, 2025 | Chromium (Total) | .0004 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377298 | |
| Oct 14, 2025 | Copper, Total | .001 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377298 | |
| Oct 14, 2025 | Cyanide, Total (as CN) | < .02 | mg/L | Effluent | Qualifying Storm Event | A4500CE | 1377298 | |
| Oct 14, 2025 | Iron, Total | < .0075 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1377298 | |
| Oct 14, 2025 | Nitrite Plus Nitrate (as N) | < .036 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1377298 | |
| Oct 14, 2025 | Oil and Grease | 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1377298 | |
| Oct 14, 2025 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | A4500HB | 1377298 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | 1.1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1377298 | |
| Oct 14, 2025 | Zinc, Total | < .0017 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1377298 | |
| Feb 13, 2025 | Aluminum, Total | .077 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1344199 | |
| Feb 13, 2025 | Cadmium, Total | .0079 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1344199 | |
| Feb 13, 2025 | Chromium (Total) | .0013 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1344199 | |
| Feb 13, 2025 | Copper, Total | .033 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1344199 | |
| Feb 13, 2025 | Cyanide, Total (as CN) | < .02 | mg/L | Effluent | Qualifying Storm Event | A4500CE | 1344199 | |
| Feb 13, 2025 | Iron, Total | .043 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1344199 | |
| Feb 13, 2025 | Nitrite Plus Nitrate (as N) | .4 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1344199 | |
| Feb 13, 2025 | Oil and Grease | < 1.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1344199 | |
| Feb 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | A4500HB | 1344199 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | .2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1344199 | |
| Feb 13, 2025 | Zinc, Total | .038 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1344199 | |
| Feb 25, 2024 | Aluminum, Total | .0061 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1292480 | |
| Feb 25, 2024 | Cadmium, Total | .001 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1292480 | |
| Feb 25, 2024 | Chromium (Total) | .000089 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1292480 | |
| Feb 25, 2024 | Copper, Total | < .00023 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1292480 | |
| Feb 25, 2024 | Cyanide, Total (as CN) | < .02 | mg/L | Effluent | Qualifying Storm Event | A4500CE | 1292480 | |
| Feb 25, 2024 | Iron, Total | < .0026 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1292480 |
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 | 17 | 16 Violation · 1 Potential (preliminary) · 0 Dismissed | Jul 02, 1999 – Sep 21, 2026 | Oct 21, 2026 | All violations |
| Enforcement actions | 16 | 16 issued · 0 draft · 0 withdrawn, rescinded or superseded | Sep 16, 2008 – Sep 21, 2026 | Oct 21, 2026 | All actions |
| Inspections | 2 | inspections, not findings | Sep 16, 2008 – Jul 01, 2019 | 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 (46 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Sep 21, 2026 | Enforcement actions | 473344 | EPL (Expedited Payment Letter) | Active | R4-2026-0261 |
| Sep 21, 2026 | Violations | 907283 | Late Report | Violation | Report |
| Jul 15, 2026 | Annual reports | 1335802 | Annual report 2025 | — | |
| Jul 30, 2025 | Enforcement actions | 456715 | NOV (Notice of Violation) | Active | |
| Jul 15, 2025 | Annual reports | 1294638 | Annual report 2024 | — | |
| Mar 05, 2025 | Enforcement actions | 455583 | EPL (Expedited Payment Letter) | Active | R4-2025-0109 |
| Mar 05, 2025 | Violations | 890893 | Late Report | Violation | Report |
| Feb 12, 2025 | Enforcement actions | 455466 | NOV (Notice of Violation) | Historical | |
| Feb 12, 2025 | Violations | 890768 | Late Report | Violation | Report |
| Jan 01, 2025 | Violations | 891994 | Late Report | Violation | Report |
| Sep 05, 2024 | Annual reports | 1189776 | Annual report 2022 | — | |
| Aug 21, 2024 | Annual reports | 1243747 | Annual report 2023 | — | |
| Jul 10, 2024 | Violations | 889352 | Enforcement Action | Potential | Internal Report |
| Jul 09, 2024 | Enforcement actions | 453656 | 13383 Order (Water Code section 13383 order) | Historical | R4-2024-0188 |
| Feb 21, 2024 | Enforcement actions | 452979 | NOV (Notice of Violation) | Active | |
| Feb 21, 2024 | Violations | 888562 | Late Report | Violation | Report |
| Nov 29, 2023 | Enforcement actions | 451505 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Oct 18, 2023 | Enforcement actions | 451136 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Oct 18, 2023 | Violations | 886206 | Late Report | Violation | Report |
| Jan 18, 2023 | Enforcement actions | 449477 | EPL (Expedited Payment Letter) | Active | R4-2022-0278 |
| Dec 28, 2022 | Enforcement actions | 448612 | NOV (Notice of Violation) | Active | |
| Dec 28, 2022 | Violations | 883688 | Incomplete/Insufficient SWPPP | Violation | Report |
| Jul 13, 2022 | Annual reports | 1113193 | Annual report 2021 | — | |
| Dec 22, 2021 | Annual reports | 1069226 | Annual report 2020 | — | |
| Nov 24, 2021 | Enforcement actions | 443918 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical |
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.