Sherwin Inc
Active WDID 4 19I020513 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
- Receiving water
- Pacific Ocean (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; 2 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 89 distinct results, 10 reporting years (2015 to 2025)
- Most recent sample Feb 19, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 3 violation records · 2 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
- 33.9261, -118.17294
- 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
- 5530 Borwick Ave, South Gate 90280
- 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
- Sherwin Inc
- Primary industry (SIC)
- 2899-Chemicals and Chemical Preparations, NEC
- Application ID
- 313091
- NOI processed
- Oct 23, 2006
- Last certified
- Mar 27, 2015
- Facility size
- 33540 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 313091 | Industrial | Active | Oct 23, 2006 | — | Mar 27, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Pacific Ocean
- Discharges directly / indirectly
- N / N (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
290 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 |
|---|---|---|---|
| Los Angeles River Reach 2 (Carson to Figueroa Street) CAR4051501019990202085021 | 334 m | listed | 9 |
| Rio Hondo Reach 1 (Confl. LA River to Snt Ana Fwy) CAR4051501019990202112624 | 680 m | listed | 8 |
Waterbodies within 1.0 km of the reported facility location. Method proximity/1.
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.
89 distinct measurements across 3 parameters, most recent sample Feb 19, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 12 | 3 | 0 | Oct 14, 2025 | Feb 19, 2026 |
| 2024 | 6 | 3 | 0 | Feb 05, 2025 | Mar 07, 2025 |
| 2023 | 9 | 3 | 0 | Dec 21, 2023 | Feb 01, 2024 |
| 2022 | 9 | 3 | 0 | Nov 08, 2022 | Feb 24, 2023 |
| 2021 | 9 | 3 | 0 | Oct 25, 2021 | Mar 28, 2022 |
| 2020 | 9 | 3 | 0 | Dec 28, 2020 | Mar 15, 2021 |
| 2019 | 12 | 3 | 0 | Nov 27, 2019 | Apr 07, 2020 |
| 2017 | 6 | 3 | 0 | Jan 09, 2018 | Mar 02, 2018 |
| 2016 | 9 | 3 | 0 | Dec 22, 2016 | Feb 06, 2017 |
| 2015 | 8 | 3 | 0 | Sep 15, 2015 | Jan 05, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| pH | SU | 30 | 0 | Sep 15, 2015 | Feb 19, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 30 | 2 | Sep 15, 2015 | Feb 19, 2026 | Results |
| Oil and Grease | mg/L | 29 | 9 | Dec 22, 2015 | Feb 19, 2026 | Results |
All results (89 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 19, 2026 | Oil and Grease | 1.3 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1370544 | |
| Feb 19, 2026 | pH | 8.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1370544 | |
| Feb 19, 2026 | Total Suspended Solids (TSS) | 17.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1370544 | |
| Nov 21, 2025 | Oil and Grease | 6.6 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1363302 | |
| Nov 21, 2025 | pH | 7.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1363302 | |
| Nov 21, 2025 | Total Suspended Solids (TSS) | 6.51 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1363302 | |
| Nov 14, 2025 | Oil and Grease | 3.01 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1363296 | |
| Nov 14, 2025 | pH | 7.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1363296 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 10.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1363296 | |
| Oct 14, 2025 | Oil and Grease | 1.44 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1360271 | |
| Oct 14, 2025 | pH | 8.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1360271 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | 100 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1360271 | |
| Mar 07, 2025 | Oil and Grease | 22.9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1330838 | |
| Mar 07, 2025 | pH | 8.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1330838 | |
| Mar 07, 2025 | Total Suspended Solids (TSS) | 14 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1330838 | |
| Feb 05, 2025 | Oil and Grease | 1.05 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1328122 | |
| Feb 05, 2025 | pH | 8.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1328122 | |
| Feb 05, 2025 | Total Suspended Solids (TSS) | 15.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1328122 | |
| Feb 01, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1285292 | |
| Feb 01, 2024 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1285292 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 4.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1285292 | |
| Jan 04, 2024 | Oil and Grease | 1.35 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1283892 | |
| Jan 04, 2024 | pH | 6.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1283892 | |
| Jan 04, 2024 | Total Suspended Solids (TSS) | 4.85 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1283892 | |
| Dec 21, 2023 | Oil and Grease | 1.51 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1283892 | |
| Dec 21, 2023 | pH | 6.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1283892 | |
| Dec 21, 2023 | Total Suspended Solids (TSS) | 16.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1283892 | |
| Feb 24, 2023 | Oil and Grease | 1.25 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1239981 | |
| Feb 24, 2023 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1239981 | |
| Feb 24, 2023 | Total Suspended Solids (TSS) | 11.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1239981 | |
| Jan 04, 2023 | Oil and Grease | 6.49 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1239981 | |
| Jan 04, 2023 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1239981 | |
| Jan 04, 2023 | Total Suspended Solids (TSS) | 46.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1239981 | |
| Nov 08, 2022 | Oil and Grease | 2.35 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1239981 | |
| Nov 08, 2022 | pH | 6.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1239981 | |
| Nov 08, 2022 | Total Suspended Solids (TSS) | 17.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1239981 | |
| Mar 28, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1182289 | |
| Mar 28, 2022 | pH | 6.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1182289 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | 32 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1182289 | |
| Dec 14, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1172270 | |
| Dec 14, 2021 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1172270 | |
| Dec 14, 2021 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1172270 | |
| Oct 25, 2021 | Oil and Grease | 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1172267 | |
| Oct 25, 2021 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1172267 | |
| Oct 25, 2021 | Total Suspended Solids (TSS) | 29 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1172267 | |
| Mar 15, 2021 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1151086 | |
| Mar 15, 2021 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1151086 | |
| Mar 15, 2021 | Total Suspended Solids (TSS) | 10 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1151086 | |
| Jan 29, 2021 | Oil and Grease | 2.6 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1140176 | |
| Jan 29, 2021 | pH | 6.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1140176 |
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 | 3 | 3 Violation · 0 Potential (preliminary) · 0 Dismissed | Nov 26, 2009 – Apr 24, 2021 | Oct 21, 2026 | All violations |
| Enforcement actions | 2 | 1 issued · 0 draft · 1 withdrawn, rescinded or superseded | Feb 25, 2010 – Apr 10, 2024 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Mar 18, 2024 – Mar 18, 2024 | 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 (17 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 30, 2026 | Annual reports | 1330831 | Annual report 2025 | — | |
| Jun 27, 2025 | Annual reports | 1295736 | Annual report 2024 | — | |
| Jul 02, 2024 | Annual reports | 1244902 | Annual report 2023 | — | |
| Apr 10, 2024 | Enforcement actions | 453261 | EPL (Expedited Payment Letter) | Rescinded | R4-2024-0116 |
| Mar 18, 2024 | Inspections | 2063868 | B Type compliance | Finalized | Additional Info Required |
| Jul 07, 2023 | Annual reports | 1190984 | Annual report 2022 | — | |
| Jul 08, 2022 | Annual reports | 1114502 | Annual report 2021 | — | |
| Jul 15, 2021 | Annual reports | 1070596 | Annual report 2020 | — | |
| Apr 24, 2021 | Violations | 888903 | Late Report | Violation | Report |
| Mar 11, 2021 | Violations | 888902 | Late Report | Violation | Report |
| Jul 14, 2020 | Annual reports | 988002 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 955630 | Annual report 2018 | — | |
| Jun 22, 2018 | Annual reports | 941052 | Annual report 2017 | — | |
| Jul 10, 2017 | Annual reports | 880416 | Annual report 2016 | — | |
| Jun 23, 2016 | Annual reports | 843412 | Annual report 2015 | — | |
| Feb 25, 2010 | Enforcement actions | 405065 | SEL (Staff Enforcement Letter) | Historical | |
| Nov 26, 2009 | Violations | 844314 | Deficient BMP Implementation | Violation | Report |
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.