Stadco
Active WDID 4 19I002304 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
- 3 waterbodies; 3 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 447 distinct results, 10 reporting years (2016 to 2025)
- Most recent sample Nov 20, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 9 violation records · 8 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
- 34.07378, -118.22129
- 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
- 107 S Avenue 20th, Los Angeles 90031
- 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
- Active
- Operator
- Stadco
- Primary industry (SIC)
- 3599-Industrial and Commercial Machinery and Equipment, NEC
- Application ID
- 188932
- NOI processed
- Mar 31, 1992
- Last certified
- Jan 13, 2023
- Facility size
- 262209 SqFt
- Impervious area
- 15 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 188932 | Industrial | Active | Mar 31, 1992 | — | Jan 13, 2023 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- DWP
- Discharges directly / indirectly
- N / Y (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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Los Angeles River Reach 2 (Carson to Figueroa Street) CAR4051501019990202085021 | 375 m | listed | 9 |
| Arroyo Seco Reach 1 (LA River to West Holly Ave.) CAR4051501019990202132906 | 738 m | listed | 2 |
| Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.) CAR4052100019990202090157 | 738 m | listed | 5 |
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 |
| Los Angeles River Nitrogen TMDL | Los Angeles River Watershed | Nitrite Plus Nitrate (as N) | 8 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
2 records. 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.
447 distinct measurements across 12 parameters, most recent sample Nov 20, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 72 | 12 | 0 | Oct 14, 2025 | Nov 20, 2025 |
| 2024 | 48 | 12 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2023 | 60 | 12 | 0 | Jan 03, 2024 | Feb 06, 2024 |
| 2022 | 96 | 12 | 0 | Dec 12, 2022 | Feb 24, 2023 |
| 2021 | 21 | 7 | 0 | Dec 14, 2021 | Dec 14, 2021 |
| 2020 | 28 | 7 | 0 | Jan 29, 2021 | Mar 03, 2021 |
| 2019 | 48 | 6 | 0 | Nov 20, 2019 | Apr 06, 2020 |
| 2018 | 48 | 6 | 0 | Nov 29, 2018 | May 16, 2019 |
| 2017 | 18 | 6 | 0 | Jan 08, 2018 | Jan 08, 2018 |
| 2016 | 8 | 2 | 0 | Feb 24, 2017 | Feb 24, 2017 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 53 | 40 | Feb 24, 2017 | Nov 20, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 53 | 23 | Feb 24, 2017 | Nov 20, 2025 | Results |
| Aluminum, Total | mg/L | 49 | 6 | Jan 08, 2018 | Nov 20, 2025 | Results |
| Iron, Total | mg/L | 49 | 13 | Jan 08, 2018 | Nov 20, 2025 | Results |
| pH | SU | 49 | 0 | Jan 08, 2018 | Nov 20, 2025 | Results |
| Nickel, Total | mg/L | 42 | 5 | Jan 08, 2018 | Nov 20, 2025 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 30 | 0 | Jan 29, 2021 | Nov 20, 2025 | Results |
| Zinc, Total | mg/L | 30 | 0 | Jan 29, 2021 | Nov 20, 2025 | Results |
| Copper, Total | mg/L | 23 | 0 | Dec 12, 2022 | Nov 20, 2025 | Results |
| Lead, Total | mg/L | 23 | 7 | Dec 12, 2022 | Nov 20, 2025 | Results |
| Magnesium, Total | mg/L | 23 | 2 | Dec 12, 2022 | Nov 20, 2025 | Results |
| Titanium, Total | mg/L | 23 | 4 | Dec 12, 2022 | Nov 20, 2025 | Results |
All results (447 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Nov 20, 2025 | Aluminum, Total | .179 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Aluminum, Total | .0206 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Aluminum, Total | .0159 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Copper, Total | .0169 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Copper, Total | .0123 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Copper, Total | .0118 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Iron, Total | .13 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361458 | |
| Nov 20, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361458 | |
| Nov 20, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361458 | |
| Nov 20, 2025 | Lead, Total | .0013 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Lead, Total | < .0008 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Lead, Total | < .0008 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Magnesium, Total | .2 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361458 | |
| Nov 20, 2025 | Magnesium, Total | .32 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361458 | |
| Nov 20, 2025 | Magnesium, Total | .16 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361458 | |
| Nov 20, 2025 | Nickel, Total | .0044 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Nickel, Total | .0034 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Nickel, Total | .0019 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Nitrite Plus Nitrate (as N) | .51 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1361458 | |
| Nov 20, 2025 | Nitrite Plus Nitrate (as N) | 1.37 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1361458 | |
| Nov 20, 2025 | Nitrite Plus Nitrate (as N) | .48 | mg/L | Effluent | Qualifying Storm Event | E353.2 | 1361458 | |
| Nov 20, 2025 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1361458 | |
| Nov 20, 2025 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1361458 | |
| Nov 20, 2025 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1361458 | |
| Nov 20, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1361458 | |
| Nov 20, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1361458 | |
| Nov 20, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1361458 | |
| Nov 20, 2025 | Titanium, Total | .0099 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Titanium, Total | < .0008 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Titanium, Total | < .0008 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Total Suspended Solids (TSS) | < 4.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361458 | |
| Nov 20, 2025 | Total Suspended Solids (TSS) | < 4.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361458 | |
| Nov 20, 2025 | Total Suspended Solids (TSS) | 24 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361458 | |
| Nov 20, 2025 | Zinc, Total | .247 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Zinc, Total | .475 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Nov 20, 2025 | Zinc, Total | .0937 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361458 | |
| Oct 14, 2025 | Aluminum, Total | .0916 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1356126 | |
| Oct 14, 2025 | Aluminum, Total | .0868 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1356126 | |
| Oct 14, 2025 | Aluminum, Total | .117 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1356126 | |
| Oct 14, 2025 | Copper, Total | .0149 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1356126 | |
| Oct 14, 2025 | Copper, Total | .0132 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1356126 | |
| Oct 14, 2025 | Copper, Total | .0213 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1356126 | |
| Oct 14, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1356126 | |
| Oct 14, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1356126 | |
| Oct 14, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1356126 | |
| Oct 14, 2025 | Lead, Total | .0009 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1356126 | |
| Oct 14, 2025 | Lead, Total | < .0008 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1356126 | |
| Oct 14, 2025 | Lead, Total | < .0008 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1356126 | |
| Oct 14, 2025 | Magnesium, Total | .27 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1356126 | |
| Oct 14, 2025 | Magnesium, Total | .42 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1356126 |
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 | 9 | 9 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 01, 2001 – Oct 30, 2025 | Oct 21, 2026 | All violations |
| Enforcement actions | 8 | 7 issued · 0 draft · 1 withdrawn, rescinded or superseded | Aug 24, 2001 – Oct 30, 2025 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | May 01, 2002 – May 01, 2002 | 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 | 2023-24 – 2023-24 | 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 (30 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| May 29, 2026 | Annual reports | 1336326 | Annual report 2025 | — | |
| Dec 23, 2025 | Water-quality-based corrective action reports | 1361027 | WQBCAR 2023-24 | — | Zinc, Total |
| Oct 30, 2025 | Enforcement actions | 467645 | ACL (Administrative Civil Liability) | Historical | R4-2025-0217 |
| Oct 30, 2025 | Violations | 902142 | Effluent | Violation | Report |
| Jun 06, 2025 | Annual reports | 1295185 | Annual report 2024 | — | |
| Jun 12, 2024 | Annual reports | 1244316 | Annual report 2023 | — | |
| Jun 05, 2024 | Enforcement actions | 453389 | ACL (Administrative Civil Liability) | Historical | R4-2024-0205 |
| Jun 05, 2024 | Violations | 889062 | Effluent | Violation | Report |
| May 11, 2023 | Annual reports | 1190364 | Annual report 2022 | — | |
| Jun 09, 2022 | Annual reports | 1113839 | Annual report 2021 | — | |
| Apr 28, 2022 | Enforcement actions | 446432 | ACL (Administrative Civil Liability) | Historical | R4-2022-0113 |
| Apr 28, 2022 | Violations | 881630 | Effluent | Violation | Report |
| Jun 16, 2021 | Annual reports | 1069902 | Annual report 2020 | — | |
| Jul 01, 2020 | Annual reports | 987254 | Annual report 2019 | — | |
| Jun 19, 2019 | Annual reports | 954856 | Annual report 2018 | — | |
| Jun 13, 2018 | Annual reports | 940274 | Annual report 2017 | — | |
| Jun 27, 2017 | Annual reports | 879594 | Annual report 2016 | — | |
| Jul 19, 2016 | Annual reports | 847228 | Annual report 2015 | — | |
| Feb 20, 2015 | Enforcement actions | 418389 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 02, 2014 | Violations | 856464 | Late Report | Violation | Report |
| Jul 02, 2013 | Violations | 856463 | Late Report | Violation | Report |
| Jul 02, 2010 | Violations | 856462 | Late Report | Violation | Report |
| Aug 19, 2002 | Enforcement actions | 247735 | NOV (Notice of Violation) | Historical | UNKNOWN |
| Jul 19, 2002 | Enforcement actions | 247734 | SEL (Staff Enforcement Letter) | Withdrawn | UNKNOWN |
| Jul 01, 2002 | Violations | 218503 | Deficient Report | Violation | Inspection |
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.