South Gate Transfer Station
Active WDID 4 19I006188 South Gate, 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
- South Gate, 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
- 2 waterbodies; 2 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 574 distinct results, 10 reporting years (2015 to 2025)
- Most recent sample Dec 26, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 5 violation records · 4 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
- 33.9442, -118.16639
- Precision
- 4 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
- 9530 Garfield, South Gate 90280
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Alhambra Wash-Rio Hondo HUC12 180701050303
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
- Los Angeles County Sanitation Districts
- Primary industry (SIC)
- 4212-Local Trucking Without Storage
- Application ID
- 189578
- NOI processed
- Apr 22, 1992
- Last certified
- Aug 16, 2019
- Facility size
- 5.3 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 189578 | Industrial | Active | Apr 22, 1992 | — | Aug 16, 2019 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Rio Hondo Reach One
- Discharges directly / indirectly
- Y / N (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 |
|---|---|---|---|
| Rio Hondo Reach 1 (Confl. LA River to Snt Ana Fwy) CAR4051501019990202112624 | 97 m | listed | 8 |
| Los Angeles River Reach 2 (Carson to Figueroa Street) CAR4051501019990202085021 | 717 m | listed | 9 |
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 | Copper, Total | .06749 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Metals TMDL | Los Angeles River and Los Angeles River Tributaries | Lead, Total | .094 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| 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 Tributaries | Ammonia, Total (as N) | 10.1 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Nitrogen TMDL | Los Angeles River Watershed | Nitrate, Total (as N) | 8 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 |
| Los Angeles River Nitrogen TMDL | Los Angeles River Watershed | Nitrite, Total (as N) | 1 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
7 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.
574 distinct measurements across 22 parameters, most recent sample Dec 26, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 32 | 17 | 0 | Nov 21, 2025 | Dec 26, 2025 |
| 2023 | 16 | 16 | 0 | Feb 05, 2024 | Feb 05, 2024 |
| 2022 | 32 | 11 | 0 | Jan 10, 2023 | Mar 14, 2023 |
| 2021 | 44 | 11 | 0 | Dec 14, 2021 | Mar 28, 2022 |
| 2020 | 11 | 11 | 0 | Jan 29, 2021 | Jan 29, 2021 |
| 2019 | 54 | 11 | 0 | Dec 04, 2019 | Apr 06, 2020 |
| 2018 | 66 | 11 | 0 | Dec 06, 2018 | Feb 14, 2019 |
| 2017 | 44 | 11 | 0 | Jan 08, 2018 | Mar 02, 2018 |
| 2016 | 143 | 11 | 0 | Nov 26, 2016 | Feb 03, 2017 |
| 2015 | 132 | 16 | 0 | Sep 15, 2015 | Mar 11, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Chemical Oxygen Demand (COD) | mg/L | 51 | 8 | Sep 15, 2015 | Dec 26, 2025 | Results |
| Enterococci MPN | MPN/100 mL | 51 | 0 | Sep 15, 2015 | Dec 26, 2025 | Results |
| pH | SU | 51 | 0 | Sep 15, 2015 | Dec 26, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 51 | 0 | Sep 15, 2015 | Dec 26, 2025 | Results |
| E.coli | MPN/100 mL | 50 | 1 | Sep 15, 2015 | Dec 26, 2025 | Results |
| Oil and Grease | mg/L | 50 | 32 | Sep 15, 2015 | Dec 26, 2025 | Results |
| Aluminum, Total Recoverable | mg/L | 38 | 0 | Dec 22, 2015 | Jan 29, 2021 | Results |
| Copper, Total Recoverable | mg/L | 38 | 9 | Dec 22, 2015 | Jan 29, 2021 | Results |
| Iron, Total Recoverable | mg/L | 38 | 1 | Dec 22, 2015 | Jan 29, 2021 | Results |
| Lead, Total Recoverable | mg/L | 38 | 7 | Dec 22, 2015 | Jan 29, 2021 | Results |
| Zinc, Total Recoverable | mg/L | 38 | 1 | Dec 22, 2015 | Jan 29, 2021 | Results |
| Aluminum, Total | mg/L | 13 | 0 | Sep 15, 2015 | Dec 26, 2025 | Results |
Show 10 more parameters
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Copper, Total | mg/L | 13 | 0 | Sep 15, 2015 | Dec 26, 2025 | Results |
| Iron, Total | mg/L | 13 | 0 | Sep 15, 2015 | Dec 26, 2025 | Results |
| Zinc, Total | mg/L | 13 | 0 | Sep 15, 2015 | Dec 26, 2025 | Results |
| Lead, Total | mg/L | 12 | 0 | Sep 15, 2015 | Nov 21, 2025 | Results |
| Ammonia, Total (as N) | mg/L | 3 | 1 | Feb 05, 2024 | Dec 26, 2025 | Results |
| Nitrate, Total (as N) | mg/L | 3 | 3 | Feb 05, 2024 | Dec 26, 2025 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 3 | 3 | Feb 05, 2024 | Dec 26, 2025 | Results |
| Nitrite, Total (as N) | mg/L | 3 | 2 | Feb 05, 2024 | Dec 26, 2025 | Results |
| Phosphorus, Total (as P) | mg/L | 3 | 0 | Feb 05, 2024 | Dec 26, 2025 | Results |
| Acrylonitrile | mg/L | 1 | 0 | Dec 26, 2025 | Dec 26, 2025 | Results |
All results (574 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Dec 26, 2025 | Acrylonitrile | .0394 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369650 | |
| Dec 26, 2025 | Aluminum, Total | 3.81 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369650 | |
| Dec 26, 2025 | Ammonia, Total (as N) | DNQ .099 | mg/L | Effluent | Qualifying Storm Event | A4500NHH | 1369650 | |
| Dec 26, 2025 | Chemical Oxygen Demand (COD) | 57.5 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1369650 | |
| Dec 26, 2025 | Copper, Total | .0351 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369650 | |
| Dec 26, 2025 | E.coli | 22000 | MPN/100 mL | Effluent | Qualifying Storm Event | A9223B | 1369650 | |
| Dec 26, 2025 | Enterococci MPN | 110000 | MPN/100 mL | Effluent | Qualifying Storm Event | DU | 1369650 | |
| Dec 26, 2025 | Iron, Total | 5.6 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369650 | |
| Dec 26, 2025 | Nitrate, Total (as N) | < .2 | mg/L | Effluent | Qualifying Storm Event | A4500F | 1369650 | |
| Dec 26, 2025 | Nitrite Plus Nitrate (as N) | DNQ .161 | mg/L | Effluent | Qualifying Storm Event | A4500F | 1369650 | |
| Dec 26, 2025 | Nitrite, Total (as N) | DNQ .012 | mg/L | Effluent | Qualifying Storm Event | A4500F | 1369650 | |
| Dec 26, 2025 | Oil and Grease | DNQ 3.5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1369650 | |
| Dec 26, 2025 | pH | 7.41 | SU | Effluent | Qualifying Storm Event | pH_Field | 1369650 | |
| Dec 26, 2025 | Phosphorus, Total (as P) | .326 | mg/L | Effluent | Qualifying Storm Event | A4500PFH | 1369650 | |
| Dec 26, 2025 | Total Suspended Solids (TSS) | 164 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1369650 | |
| Dec 26, 2025 | Zinc, Total | .195 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369650 | |
| Nov 21, 2025 | Aluminum, Total | 13 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365349 | |
| Nov 21, 2025 | Ammonia, Total (as N) | .103 | mg/L | Effluent | Qualifying Storm Event | A4500NHH | 1365349 | |
| Nov 21, 2025 | Chemical Oxygen Demand (COD) | 202 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1365349 | |
| Nov 21, 2025 | Copper, Total | .0982 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365349 | |
| Nov 21, 2025 | E.coli | 20000 | MPN/100 mL | Effluent | Qualifying Storm Event | A9223B | 1365349 | |
| Nov 21, 2025 | Enterococci MPN | 170000 | MPN/100 mL | Effluent | Qualifying Storm Event | DU | 1365349 | |
| Nov 21, 2025 | Iron, Total | 16.3 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365349 | |
| Nov 21, 2025 | Lead, Total | .142 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365349 | |
| Nov 21, 2025 | Nitrate, Total (as N) | < .2 | mg/L | Effluent | Qualifying Storm Event | A4500F | 1365349 | |
| Nov 21, 2025 | Nitrite Plus Nitrate (as N) | DNQ .2 | mg/L | Effluent | Qualifying Storm Event | A4500F | 1365349 | |
| Nov 21, 2025 | Nitrite, Total (as N) | DNQ .016 | mg/L | Effluent | Qualifying Storm Event | A4500F | 1365349 | |
| Nov 21, 2025 | Oil and Grease | 7.8 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1365349 | |
| Nov 21, 2025 | pH | 8.42 | SU | Effluent | Qualifying Storm Event | pH_Field | 1365349 | |
| Nov 21, 2025 | Phosphorus, Total (as P) | .85 | mg/L | Effluent | Qualifying Storm Event | E365.1 | 1365349 | |
| Nov 21, 2025 | Total Suspended Solids (TSS) | 585 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365349 | |
| Nov 21, 2025 | Zinc, Total | .671 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365349 | |
| Feb 05, 2024 | Aluminum, Total | 3.35 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1286720 | |
| Feb 05, 2024 | Ammonia, Total (as N) | .64 | mg/L | Effluent | Qualifying Storm Event | A4500NHH | 1286720 | |
| Feb 05, 2024 | Chemical Oxygen Demand (COD) | 75.1 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1286720 | |
| Feb 05, 2024 | Copper, Total | .021 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1286720 | |
| Feb 05, 2024 | E.coli | 170000 | MPN/100 mL | Effluent | Qualifying Storm Event | A9223B | 1286720 | |
| Feb 05, 2024 | Enterococci MPN | 770000 | MPN/100 mL | Effluent | Qualifying Storm Event | 650399 | 1286720 | |
| Feb 05, 2024 | Iron, Total | 4.92 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1286720 | |
| Feb 05, 2024 | Lead, Total | .0446 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1286720 | |
| Feb 05, 2024 | Nitrate, Total (as N) | < .2 | mg/L | Effluent | Qualifying Storm Event | A4500F | 1286720 | |
| Feb 05, 2024 | Nitrite Plus Nitrate (as N) | DNQ .16 | mg/L | Effluent | Qualifying Storm Event | A4500F | 1286720 | |
| Feb 05, 2024 | Nitrite, Total (as N) | .038 | mg/L | Effluent | Qualifying Storm Event | A4500F | 1286720 | |
| Feb 05, 2024 | Oil and Grease | 7.4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1286720 | |
| Feb 05, 2024 | pH | 7.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1286720 | |
| Feb 05, 2024 | Phosphorus, Total (as P) | .324 | mg/L | Effluent | Qualifying Storm Event | A4500PFH | 1286720 | |
| Feb 05, 2024 | Total Suspended Solids (TSS) | 90 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1286720 | |
| Feb 05, 2024 | Zinc, Total | .22 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1286720 | |
| Mar 14, 2023 | Aluminum, Total | 2.4 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1237183 | |
| Mar 14, 2023 | Chemical Oxygen Demand (COD) | 162 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1237183 |
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 | 5 | 4 Violation · 1 Potential (preliminary) · 0 Dismissed | Sep 18, 2001 – Aug 02, 2023 | Oct 21, 2026 | All violations |
| Enforcement actions | 4 | 4 issued · 0 draft · 0 withdrawn, rescinded or superseded | Sep 18, 2001 – Sep 18, 2020 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Sep 18, 2001 – Sep 18, 2001 | 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 (21 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 09, 2026 | Annual reports | 1335448 | Annual report 2025 | — | |
| Jul 14, 2025 | Annual reports | 1294267 | Annual report 2024 | — | |
| Jul 03, 2024 | Annual reports | 1243353 | Annual report 2023 | — | |
| Aug 02, 2023 | Violations | 885588 | Effluent | Violation | Report |
| Jul 12, 2023 | Annual reports | 1189356 | Annual report 2022 | — | |
| Jul 13, 2022 | Annual reports | 1112737 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1068747 | Annual report 2020 | — | |
| Sep 18, 2020 | Enforcement actions | 437626 | TSO (Time Schedule Order) | Historical | R4-2020-0067 |
| Sep 18, 2020 | Violations | 874017 | Effluent | Potential | Report |
| Jul 10, 2020 | Annual reports | 986009 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 953565 | Annual report 2018 | — | |
| Jul 12, 2018 | Annual reports | 938981 | Annual report 2017 | — | |
| Jul 07, 2017 | Annual reports | 878224 | Annual report 2016 | — | |
| Jul 06, 2016 | Annual reports | 840760 | Annual report 2015 | — | |
| Jun 12, 2012 | Enforcement actions | 409015 | SEL (Staff Enforcement Letter) | Historical | |
| Dec 17, 2010 | Violations | 848077 | Deficient BMP Implementation | Violation | Report |
| Nov 24, 2010 | Enforcement actions | 404640 | SEL (Staff Enforcement Letter) | Historical | |
| Dec 22, 2008 | Violations | 843907 | Deficient BMP Implementation | Violation | Report |
| Sep 18, 2001 | Enforcement actions | 238455 | NTC (Notice to Comply) | Historical | UNKNOWN |
| Sep 18, 2001 | Inspections | 1733760 | B Type compliance | — | Additional Info Required |
| Sep 18, 2001 | Violations | 191105 | Deficient BMP Implementation | 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.